HP 1900 Service Manual

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Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments

Index

Presario 1900 Series

Welcome to the Maintenance & Service Guide
(MSG). This online guide is designed to serve the
needs of technicians whose job it is to repair
Compaq products. The

copyright and trademark information. The

Notice contains the

Preface

shows symbol conventions, Technician Notes and
Serial Number locations on the unit.

This MSG periodically will be maintained and
updated online as needed.

Tech Support..

To report a technical problem, contact your
Regional Support Center or IM Help Center.

For the best results when printing this MSG, set
printer properties to landscape.

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Preface

This Maintenance and Service Guide is a troubleshooting guide that can be used for reference when
servicing the Compaq Presario 1900 Series Portable Computers.

Compaq Computer Corporation reserves the right to make changes to the Compaq Presario 1900
Series Portable Computers without notice. See

Notice for license and nondisclosure agreements.

Symbols

The following words and symbols mark special messages throughout this guide.

WARNING: Text set off in this manner indicates that failure to follow directions in the warning could result in bodily harm or loss of
life.

CAUTION: Text set off in this manner indicates that failure to follow directions could result in damage to equipment or loss of data.

IMPORTANT:

Text set off in this manner presents clarifying information or specific instructions.

Text set off in this manner presents commentary, sidelights, or interesting points of

NOTE:

information.

Technician Notes

WARNING: Only authorized technicians trained by Compaq should repair this equipment. All troubleshooting and repair procedures
are detailed to allow only subassembly/module level repair. Because of the complexity of the individual boards and subassemblies,
the user should not attempt to make repairs at the component level or to make modifications to any printed circuit board. Improper
repairs can create a safety hazard. Any indications of component replacement or printed circuit board modifications may void any
warranty

Serial Number

When requesting information or ordering spare parts, the computer serial number should be
provided to Compaq. The serial number is located on the bottom of the computer.

Locating Additional Information

The following documentation is available to support this product:

● Compaq Presario 1900 Series Portable Computer documentation set

● Introducing Windows 98 Guide

● Service Training Guides

● Compaq Service Advisories and Bulletins

● Compaq QuickFind

● Compaq Service Quick Reference Guide

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Specifications Parts Catalog

Notice

The information in this guide is subject to change without notice.

COMPAQ COMPUTER CORPORATION SHALL NOT BE LIABLE FOR TECHNICAL OR
EDITORIAL ERRORS OR OMISSIONS CONTAINED HEREIN, NOR FOR INCIDENTAL
OR CONSEQUENTIAL DAMAGES RESULTING FROM THE FURNISHING,
PERFORMANCE, OR USE OF THIS MATERIAL.

This guide contains information protected by copyright. No part of this guide may be
photocopied or reproduced in any form without prior written consent from Compaq
Computer Corporation.

© 2000 Compaq Computer Corporation.
All rights reserved. Printed in the U.S.A.

Compaq, Presario Registered U. S. Patent and Trademark Office.

Microsoft, MS-DOS, and Windows are registered trademarks of Microsoft Corporation.
Windows 98 is a trademark of Microsoft Corporation.

The software described in this guide is furnished under a license agreement or
nondisclosure agreement. The software may be used or copied only in accordance with
the terms of the agreement.

Product names mentioned herein may be trademarks and/or registered trademarks of
their respective companies.

Maintenance and Service Guide

Compaq Presario 1900 Series Portable Computers

First Edition (Oct. 1998)
Compaq Computer Corporation

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Specifications

This chapter covers the following specifications of Compaq Presario 1900
Series Portable Computers:

● Physical and Environmental

● System Interrupts

● System DMA

● System I/O Addresses

● System Memory Catalog

● Display Information

● Diskette Drive

● Hard Drive

● CD ROM or DVD Drive

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Specifications

Physical and Environmental

Presario 1900 Series

Computer Specifications

12.1 in TFT Dimensions

Height
Depth
Width

13.3 in TFT Dimensions

Height
Depth
Width

Weight

12.1 in TFT

13.3 in TFT
Wedge

1.1 in

11.6 in

9.2 in

1.2 in

11.6 in

9.2 in

4.5 lbs

5.0 lbs

1.8 lbs

U.S. Metric

234mm

294.7mm
29mm

234mm

294.7mm

30.5mm

Stand-Alone (Battery Pack) Power Requirements

Li-ion

Nominal Operating
Maximum Average
Peak Operating

AC Power Requirements

Operating Voltage
Operating Current
Operating Frequency

Maximum Transient

Temperature

Operating 50° to 95 °F 10° to 35 °C
Nonoperating -4° to 140 °F -20° to 60 °C

Relative Humidity (noncondensing)

100-240 V

0.8/0.4 A RMS
47-63 Hz
Meets IEC 801-4 and IEC801-5
1kV for 50 ns

W @ 14.4 V
W @ 14.4 V
W @ 14.4 V

Operating 10 to 90% 35°C to 90%
Nonoperating (tw = 38.7°C max) 5 to 95% 60°C to 95%

Altitude

Operating 0 to 10,000 ft 0 to 3.15 km
Nonoperating 0 to 30,000 ft 0 to 9.14 km

Shock

Operating 10 G, 11 ms, half sine
Non operating 240 G, 2 ms, half sine

Vibration

Operating 0.5 G
Nonoperating

NOTE: Applicable product safety standards specify thermal limits for plastic surfaces. Compaq
Presario 1900 Series Portable Computers operate well within this range of temperatures.

1.5 G

Next Page

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Specifications

System Interrupts

IRQ Device(s)

Maintenance & Service Guide

Presario 1900 Series

1922, 1925, 1926, 1927, 1928, 1929, and 1930

0 System Timer
1 Standard 101/102-Key or Microsoft

Natural Keyboard
2 Programmable Interrupt Controller
3 Ambit Modem
4 Communications Port (COM1)
5 NMA2 Audio Controller
6 Standard Floppy Disk Controller
7 Printer Port (LPT1)
8 System CMOS/Real Time Clock
9 Intel 82371AB/EB PCI to USB Universal

Host Controller
10 PCI Fast Ethernet DEC 21143 Based

Adapter
11 Texas Instruments PCI-1225 CardBus

Controller

NeoMagic NMG5 Graphics Controller
12 PS/2 Compatible Mouse Port
13 Numeric Data Processor
14 Intel 82371AB/EB PCI Bus Master IDE

Controller
15 Intel 82371AB/EB PCI Bus Master IDE

Controller

Next Page

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Specifications

System DMA

Maintenance & Service Guide

Presario 1900 Series

1922, 1925, 1926, 1927, 1928, 1929, and 1930

DMA Device(s)

0 NMA2 Audio Controller

1 NMA2 Audio Controller

2 Floppy Disk Controller

3 Parallel Port (ECP Mode)

5 Free

6 Free

7 Free

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Specifications

System I/O Address

I/O Address System Function (Shipping Configuration)

Maintenance & Service Guide

Presario 1900 Series

0000 - 000F Direct Memory Access Controller
0020 - 0021 Programmable Interrupt Controller
0040 - 0043 System Timer
0060 - 0060 Standard 101/102-Key or Microsoft Natural Keyboard
0061 - 0061 System Speaker
0064 - 0064 Standard 101/102-Key or Microsoft Natural Keyboard
0070 - 0071 System CMOS/Real Time Clock
0081 - 008F Direct Memory Access Controller
00A0 - 00A1 Programmable Interrupt Controller
00C0 - 00DF Direct Memory Access Controller
00E0 - 00E1 Motherboard Resources
00F0 - 00FF Numeric Data Processor
0170 - 0177 Intel 82371AB/EB PCI Bus Master IDE Controller
01F0 - 01F7 Intel 82371AB/EB PCI Bus Master IDE Controller
0201 - 0201 Gameport Joystick
0274 - 0277 IO read data port for ISA Plug and Play Enumerator
0376 - 0376 Intel 82371AB/EB PCI Bus Master IDE Controller
0378 - 037F Printer Port (LPT1)
03B0 - 03BB NeoMagic NMG5 Graphics Controller
03C0 - 03DF NeoMagic NMG5 Graphics Controller
03F0 - 03F5 Standard Floppy Disk Controller
03F6 - 03F6 Intel 82371AB/EB PCI Bus Master IDE Controller
03F7 - 03F7 Standard Floppy Disk Controller
03F8 - 03FF Communications Port (COM1)
03D0 - 04D1 Motherboard Resources
0CF8 - 0CFF PCI Bus
1000 - 103F Motherboard Resources
1040 - 104F Motherboard Resources
1050 - 105F Intel 82371AB/EB PCI Bus Master IDE Controller
1060 - 107F Intel 82371AB/EB PCI to USB Universal Host Controller
1080 - 10FF PCI Fast Ethernet DEC 21143 Based Adapter
1400 - 14FF PCI Communication Device
1800 - 1807 PCI Communication Device

System Memory Catalog

Memory
Address

00000000 ­0009FFFF

000A0000 ­000AFFFF

Device

System Board Extension for PnP BIOS

NeoMagic NMG5 Graphics Controller

000B0000 ­000BFFFF

000C0000 ­000CBFFF

000E4000 ­000FFFFF

00100000 ­03FFFFFF

04000000 ­04000FFF

04001000 ­04001FFF

NeoMagic NMG5 Graphics Controller

NeoMagic NMG5 Graphics Controller

System Board Extension for PnP BIOS

System Board Extension for PnP BIOS

Texas Instruments PCI-1225 CardBus Controller

Texas Instruments PCI-1225 CardBus Controller

F4000000 ­F40000FF

F4000400 ­F40007FF

F4100000 ­F41FFFFF

F4100000 ­F47FFFFF

F4200000 ­F42FFFFF

F4400000 ­F47FFFFF

PCI Communication Device

PCI Fast Ethernet DEC 21143 Based Adapter

NeoMagic NMG5 Graphics Controller

Intel 82443BX Pentium(r) II Processor to AGP
Controller

PCI Multimedia Audio Device

NeoMagic NMG5 Graphics Controller

F4C00000 ­F4FFFFFF

F4C00000 ­F5FFFFFF

F5000000 ­F5FFFFFF

F8000000 ­FBFFFFFF

FFF80000 ­FFFFFFFF

Display Information

PCI Multimedia Audio Device

Intel 82443BX Pentium(r) II Processor to AGP
Controller

NeoMagic NMG5 Graphics Controller

Intel 82443BX Pentium(r) II Processor to PCI
Bridge (with GART support)

Motherboard Resources

12.1 in TFT
Dimensions

Height
Depth
Width

13.3 in TFT
Dimensions

Height
Depth
Width

12.1 in TFT Display

U.S. Metric

1.1 in

11.6 in

9.2"

1.2 in

11.6 in

9.2 in

234mm

294.7mm
29mm

234mm

294.7mm

30.5mm

Memory Expansion (Not Applicable in this Form Factor)

Diskette Drive

Storage Drives

Capacity per Diskette (High/Low)
Diskette Size 3.5 in

3.5 in Drive LS-120 Drive

Low 720KB
High 1.44MB

Information
Not Applicable

Number of LED Indicators

1

(Read/Write)
Number of Drives Supported 1
Drive Rotation (rpm) 360

Low 31

Transfer Rate (Kbps/Sec)

High 62

Bytes per Sector 512

Low 9

Sectors per Track (High/Low)

High 18

Access Times

3ms

Track-to-Track (ms)

15ms

Head Setting (ms)
Cylinders (High/Low) Not Available
Number of Read/Write Heads 2

Next Page

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Specifications

System I/O Address

I/O Address System Function (Shipping Configuration)

Maintenance & Service Guide

Presario 1900 Series

1922, 1925, 1926, 1927, 1928, 1929, and 1930

0000 - 000F Direct Memory Access Controller

0020 - 0021 Programmable Interrupt Controller

0040 - 0043 System Timer

0060 - 0060 Standard 101/102-Key or Microsoft Natural Keyboard

0061 - 0061 System Speaker

0064 - 0064 Standard 101/102-Key or Microsoft Natural Keyboard

0070 - 0071 System CMOS/Real Time Clock

0081 - 008F Direct Memory Access Controller

00A0 - 00A1 Programmable Interrupt Controller

00C0 - 00DF Direct Memory Access Controller

00E0 - 00E1 Motherboard Resources

00F0 - 00FF Numeric Data Processor

0170 - 0177 Intel 82371AB/EB PCI Bus Master IDE Controller

01F0 - 01F7 Intel 82371AB/EB PCI Bus Master IDE Controller

0201 - 0201 Gameport Joystick

0274 - 0277 IO Read Data Port for ISA Plug and Play Enumerator

0376 - 0376 Intel 82371AB/EB PCI Bus Master IDE Controller

0378 - 037F Printer Port (LPT1)

03B0 - 03BB NeoMagic NMG5 Graphics Controller

03C0 - 03DF NeoMagic NMG5 Graphics Controller

03F0 - 03F5 Standard Floppy Disk Controller

03F6 - 03F6 Intel 82371AB/EB PCI Bus Master IDE Controller

03F7 - 03F7 Standard Floppy Disk Controller

03F8 - 03FF Communications Port (COM1)

03D0 - 04D1 Motherboard Resources

0CF8 - 0CFF PCI Bus

1000 - 103F Motherboard Resources

1040 - 104F Motherboard Resources

1050 - 105F Intel 82371AB/EB PCI Bus Master IDE Controller

1060 - 107F Intel 82371AB/EB PCI to USB Universal Host Controller

1080 - 10FF PCI Fast Ethernet DEC 21143 Based Adapter

1400 - 14FF PCI Communication Device

1800 - 1807 PCI Communication Device

System Memory Catalog

Memory Address Device

00000000 - 0009FFFF System board extension for PnP BIOS

000A0000 - 000AFFFF NeoMagic NMG5 Graphics Controller

000B0000 - 000BFFFF NeoMagic NMG5 Graphics Controller

000C0000 - 000CBFFF NeoMagic NMG5 Graphics Controller

000E4000 - 000FFFFF System Board Extension for PnP BIOS

00100000 - 03FFFFFF System Board Extension for PnP BIOS

04000000 - 04000FFF Texas Instruments PCI-1225 CardBus Controller

04001000 - 04001FFF Texas Instruments PCI-1225 CardBus Controller

F4000000 - F40000FF PCI Communication Device

F4000400 - F40007FF PCI Fast Ethernet DEC 21143 Based Adapter

F4100000 - F41FFFFF NeoMagic NMG5 Graphics Controller

F4100000 - F47FFFFF Intel 82443BX Pentium(r) II Processor to AGP

Controller

F4200000 - F42FFFFF PCI Multimedia Audio Device

F4400000 - F47FFFFF NeoMagic NMG5 Graphics Controller

F4C00000 - F4FFFFFF PCI Multimedia Audio Device

F4C00000 - F5FFFFFF Intel 82443BX Pentium(r) II Processor to AGP

Controller

F5000000 - F5FFFFFF NeoMagic NMG5 Graphics Controller

F8000000 - FBFFFFFF Intel 82443BX Pentium(r) II Processor to PCI

FFF80000 - FFFFFFFF Motherboard Resources

Display Information

12.1 in TFT
Dimensions

Height
Depth
Width

Bridge (with GART Support)

12.1 in TFT Display

U.S. Metric

1.1 in

11.6 in

9.2 in

234mm

294.7mm
29mm

13.3 in TFT
Dimensions

Height
Depth
Width

Diskette Drive

Capacity per Diskette

1.2 in

11.6 in

9.2 in

Storage Drives

3.5 in Drive LS-120 Drive

Low 720KB

234mm

294.7mm

30.5mm

Information

(High/Low)

High 1.44MB
Diskette Size 3.5 in
Number of LED Indicators

1
(Read/Write)

Number of Drives Supported 1
Drive Rotation (rpm) 360

Low 31
Transfer Rate (Kbps/Sec)

High 62
Bytes per Sector 512

Low 9
Sectors per Track (High/Low)

High 18
Access Times

Not Applicable

Hard Drive

Track-to-Track (ms)
Head Setting (ms)

3ms

15ms
Cylinders (High/Low) Not Available
Number of Read/Write Heads 2

Hard Drives

DBCA-

DBCA-

Models
Capacity Per Drive

20648

4.8-GB 6.4-GB 10.0-GB

206480

Drive Type U-DMA/33 U-DMA/33

DCXA-

21000

U­DMA/33

Logical Configuration

Cylinders
Heads
Sectors per Track
Bytes per Sector

Seek Times

(Typical, including settling
in ms)

Single Track

Full Stroke

10068
3
63
512

Read
13ms
Write
14ms

Read

2.5ms
Write

3.0ms

13424
4
63
512

Read 13ms
Write 14ms

Read

2.5ms
Write

3.0ms
Read 23ms

Write

16383
6
63
512

Read
12ms
Write
14ms

Read

2.5ms
Write

3.0ms

Read

24ms
23ms
Write
24ms

Transfer Rate

16.6MB/s 16.6MB/s 16.6MB/s

At interface

Hard Drives, continued

MHH20

Models

MHH20 64AT

48AT

Capacity Per Drive

4.8-GB 6.4-GB 10.0-GB

Drive Type U-DMA/33 U-DMA/33
Logical Configuration

Cylinders

Not

13424

Read
23ms
Write
24ms

MHG2

102AT

U­DMA/33

16383
Heads
Sectors per Track
Bytes per Sector

Seek Times

(Typical, including settling
in ms)

Single Track

Full Stroke

Available
Not
Available
Not
Available
Not
Available

Read N/A
Write N/A

Read N/A
Write N/A

Read N/A
Write N/A

4
63
512

Read 13ms
Write 14ms

Read

2.5ms
Write

3.0ms
Read 23ms

Write

6

63

512

Read

13ms

Write

N/A

Read

1.5ms

Write

N/A

Transfer Rate

15.8MB/s 16.6MB/s 15.8MB/s

At interface

Hard Drives, continued

DK238 A-

Models

43

Capacity Per Drive

4.3 GB

Drive Type
Logical Configuration

24ms

DK228 A-65

6.4
GB(12.7mm)

Read

23ms

Write

N/A

DK239 A-

65

6.4 GB

U-

DMA/33

Cylinders
Heads
Sectors per Track
Bytes per Sector

Seek Times

(Typical, including settling
in ms)

Single Track

Full Stroke

Not
Available
Not
Available
Not
Available
Not
Available

Read N/A
Write N/A

Read N/A
Write N/A

Read N/A
Write N/A

13424
4
63
512

Read
Write

16383

6

63

512

Read

Write

N/A

Read

Write

N/A

Transfer Rate
At interface

CD ROM or DVD Drive

Models CRN-

Dimensions

Width

CD ROM Drive

(24X)

CDR-

8142B

128mm

U242Z

Not

DVD Drive (4X)

DRD-424 SD-C2202

128mm

128mm

Read

Write

N/A

Height
Depth

12.7mm
129mm

Available
Not
Available
Not
Available

Weight 300g Not

Available

Rotational
Speed

Typical
Transfer
Rate
Sustained

5000RPM Not

Available

16.67MB/s
3600KB/s

Not
Available
Not

Available
Data
Transfer
Rate

12.7mm
129mm

12.7mm
129mm

280g 270g

2300 RPM 2300RPM

16.6MB/s(PIO)
5400KB/s

16.7MB/s(PIO)
5400KB/s

Access
Time
Average

110ms Not

Available

150ms 140ms

Random
Access
Time

Spin Up
Time

Data Buffer
Capacity

5s Not

Available

1Mbit Not

Available

<15s*1 3.8s

128KB 128KB

Go back to the top of Specifications

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Illustrated Parts Catalog

Presario 1900 Series

System Unit
Boards
Display

Assembly
Mass Storage

Devices
Miscellaneous

Hardware and
Plastics Kit

Miscellaneous
Hardware and
Plastics Wedge
Kit

Miscellaneous

This
section
provides
an
illustrated
parts
breakdown
and a
reference
for spare
parts for
the
Presario
1900
Series
Portable
Computer.

Parts
Documentation

and Software
Configure to

Order

The
computer
(1) serial
number
should be
provided to
Compaq
whenever
requesting
information
or ordering
spare
parts. The
serial
number is
located

bottom of
unit.

on

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Illustrated Parts Catalog

System Unit

Boards
Display Assembly
Mass Storage

Devices
Miscellaneous

Hardware and
Plastics Kit

Parts Catalog

System Unit

Description

1. Keyboards
331419­001

U.S.

(or)
140676-

Miscellaneous
Hardware and
Plastics Wedge Kit

Miscellaneous
Parts

Documentation
and Software

Configure to
Order

International

United
Kingdom

001
(or)
159404­001
331419­002
(or)
140676­002
(or)
159404­002
331419­031
(or)
159404­031

Asia Pacific
People's

Republic of
China

France

Latin America

Japan

331419­AA1

331419­371

331419­051
(or)
140676­051
(or)
159404­051
331419­161
331419­291
(or)
159404­291
140676­061

Italy

(or)
159404­061

2. Upper CPU Cover
w/Palmrest and
TouchPad Spare
Part No: 331423­001 or 140678-001
or 159400-001

3. Speaker Assembly
w/Cable Spare Part
No: 331420-001

4. Battery Pack - Li
ion Spare Part No:
386500-001 or
140664-001

5.

CPU Base Assembly
Enclosure with System
Board and Speaker
Assembly, (Bottom
Plastics)
Spare Part No: 331414­001 or 140671-001 or
159398-001 (model

1930)

6. CPU Base Assembly

Enclosure with Shield,
(Bottom Plastics ­Not Shown)
Spare Part No: 331421­001 or 140679-001

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Illustrated Parts Catalog

Presario 1900 Series

System Unit

Boards

Display Assembly
Mass Storage

Devices
Miscellaneous

Hardware and
Plastics Kit

Miscellaneous
Hardware and
Plastics Wedge Kit

Miscellaneous
Parts

Documentation
and Software

Boards

Description Spare

Part
Number

1. Processors

Pentium
II/266-MHz
w/512 Cache
Pentium
II/300-MHz
w/512 Cache
Celeron/266­MHz w/128K

400779-001

400780-001

102422-001

Configure to Order

Cache
Celeron/300­MHz w/128K
Cache
Pentium
II/333-MHz
w/256K Cache
Celeron II/333­MHz w/128
Cache
Celeron II/400­MHz w/128K
Cache
Pentium
II/300-MHz
w/512 Cache
Celeron II/300-

102268-001

107999-001 or
159864-001

140670-001

159865-001

140667-001

MHz w/128
Cache
Pentium 333
MKz w/256c
Cache
Celeron II/333
MHz w/128
Cache
Celeron II/400
MHz w/128
Cache
Pentium
II/366-MHz
w/256 Cache
Pentium
II/400-MHz
w/256 Cache

140668-001

107999-001 or
159864-001

14670-001

159865-001

159866-001

159445-001

2. Hard
Drive/Battery
Charger Board
w/RTC Battery

3. Modem
w/Shield, 56.0
Kbps Data/Fax

4. Low Voltage
Differential
Signal Board
(For 13.3'
Display Panel)

331412­001

331429­001

331411­001
or
159396­001

5. Voltage
Converter Board

6. PC Card
Assembly

7. Fan Assembly
(Not Shown)

331413­001

102123­001

331410­001 or
159403­001

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Illustrated Parts Catalog

System Unit
Boards

Display
Assembly

Mass Storage
Devices

Miscellaneous
Hardware and
Plastics Kit

Miscellaneous
Hardware and
Plastics Wedge
Kit

Miscellaneous
Parts

Documentation
and Software

Configure to
Order

Display Panel
Assembly

Description Spare

Part
Number

Display
Panel
Assembly
w/Cable

13.3 inch
TFT

Display
Panel
Assembly
w/Cable and
Connector,

12.1 inch
TFT

331409­001 or
140666­001

331408­001 or
140665­001

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Illustrated Parts Catalog

Presario 1900 Series

System Unit
Boards
Display

Assembly

Mass Storage
Devices

Miscellaneous
Hardware and
Plastics Kit

Miscellaneous
Hardware and
Plastics Wedge
Kit

Miscellaneous
Parts

Documentation
and Software

Mass Storage
Devices

Description

1. Diskette
Drive
w/cable

1.44 MB,

3.5 inch

2. LS-120
Drive

3. Hard
Drive

Model

No.

1905,
1906,
1910,
1915,
1919
&
1920

1922
&
1925

1905,
1906,

Spare

Part

Number

331428­001

TDB

Configure to
Order

4.8-GB

6.4-GB

4.0-GB

6.4-GB

10-GB

1910,
1915,
1919,
&
1920

1905,
1906,
1910,
1915,
1919,
&
1920

1922
&
1925

331415­001

331416­001

140672­001

140673­001

140674­001

DVD Drive
w/Interface
Connector

1922
&
1925

1922
&
1925

1905,
1906,
1910,
1915,
1919,
&
1920

1922

331427­001

140682­002

&
1925

24X CD
Drive
w/cable

1905,
1906,
1910,
1915,
1919,
&
1920

102122­001

TBD

1922
&
1925

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Illustrated Parts Catalog

Presario 1900 Series

System Unit
Boards
Display

Assembly
Mass Storage

Devices

Miscellaneous
Hardware
and Plastics
Kit

Miscellaneous
Hardware and
Plastics Wedge
Kit

Miscellaneous
Parts

Miscellaneous
Hardware and
Plastics Kit

Spare Part Number:
331418-001
(Models: 1905,
1906, 1910, 1915,
1919, & 1920)

Spare Part Number:
140675-001
(Models: 1900T,
1922, 1925, 1926,
1927, 1928, 1929,

1930)

Documentation
and Software

Configure to Order

Description Quantity

1. Display

1 each
Panel
Assembly
Hinge Cover,
Left

2. Display

1 each
Panel
Assembly
Hinge Cover,
Right

3. CD/DVD

1 each
Guide Rails

4. PC Card
Placeholder

5. Display
Panel
Assembly
Hinge Frame
(Left and
Right)

6.
Heatspreader
with Thermal
Pad

12.1 inch
FPC Support

1 each

1 each

2 each

1 each
Bracket

(Not Shown)
Keyboard

Eject Latch
(Not Shown)

TouchPad
Switch (Not
Shown)

Scroll Button
Switch (Not
Shown)

Battery Eject
Latch (Not

1 each

1 each

1 each

1 each
Shown)

Display
Screw Hole
Covers
(Not Shown)

Battery Knob
Spring Coil
(Not Shown)

Volume
Switch Knob
(Not Shown)

Display Eject
Latch (Not

4 each

2 each

1 each

1 each
Shown)

RJ11 Jack
Assembly
(Not Shown)

Rubber Feet
(Not Shown)

1 each

2 each

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Illustrated Parts Catalog

Presario 1900 Series

System Unit
Boards
Display

Assembly
Mass Storage

Devices

Miscellaneous
Hardware
and Plastics
Kit

Miscellaneous
Hardware and
Plastics Wedge
Kit

Miscellaneous
Parts

Miscellaneous Hardware
and Plastics Wedge Kit

Spare Part Numbers:
331424-001
(Models: 1905, 1906,
1910, 1915, 1919, &

1920)

Spare Part Numbers:
140680-001
(Models: 1900T, 1922,
1925, 1926, 1927,
1928, 1929, 1930)

Description Quantity

Documentation
and Software

Configure to
Order

1. Diskette
Drive Shield

2. Alignment
Pins (Left and
Right)

3. DVD Drive
Shield

4. Eject
Mechanism
Assembly
w/Springs
(Left and
Right)

1 each

2 each

1 each

2 each

5. Rubber
Feet

6. Wedge to
Port
Replicator
Interface
Board

7.
Reinforcement
Bracket

Top and
Bottom
Wedge Cover
(Not Shown)

4 each

1 each

1 each

331425­001

System to

1 each
Wedge
Interface
Board

Eject Plunger

2 each
Knobs (Not
Shown)

Plunger

2 each
Spring Coil
(Not Shown)

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Illustrated Parts Catalog

Presario 1900 Series

System Unit
Boards
Display

Assembly
Mass Storage

Devices
Miscellaneous

Hardware and
Plastics Kit

Miscellaneous
Hardware and
Plastics Wedge
Kit

Miscellaneous
Parts

Documentation
and Software

Configure to
Order

Miscellaneous Parts

Description Spare

Part
Number

1. AC 45W
Adapter

2. Integrated
10/100BaseT
Ethernet Port
Replicator

Miscellaneous
Screw Kit
(Not Shown)

358976­001

331407­001 or
140663­001

331422­001
or
159399­001

Y Cable
Assembly
(Not Shown)

102422­001

Maintenance & Service Guide

117894-001 US/PR

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Illustrated Parts Catalog

Documentation and Software

Presario 1900 Series

System Unit
Boards
Display

Assembly
Mass Storage

Devices
Miscellaneous

Hardware and
Plastics Kit

Miscellaneous
Hardware and
Plastics Wedge
Kit

Miscellaneous
Parts

Documentation
and Software

Configure to
Order

Description Spare Part Number

Quick Restore CD 1

US/PR
Mexico
APD
PRC
Korea
AUS
Japan
UK
France
Italy
Belgium

122314­001
122314­161
122314­371
122314­AA1
122314­AD1
122314­371
122314­291
122314­031
122314­051
122314­061
122314­AK1

Quick Restore CD 2

Reference Guide

Quick Reference Guide

QuickFind for Windows, North America, Latin America, Asia

Belgium

Not Available

Not Available

122314­KK1

Pacific
QuickFind for Windows, Europe, Middle East, Africa Not Available

QuickFind is updated monthly. To complete the QuickFind part number, add the
suffix from the table below for the desired month. If you do not specify the 3­digit suffix, the default is the current month in which the order is placed.

QuickFind Part Number Suffix

Suffix Month Suffix Month

-001 January -007 July

-002 February -008 August

-003 March -009 September

-004 April -010 October

-005 May -011 November

-006 June -012 December

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Illustrated Parts Catalog

Configure To Order Features

Compaq Presario 1900T Portable Computer Configure To Order Features

Processors

Celeron 400 w/DC/BGA
Pentium II 400 w/256 Cache
Pentium II 366

System Memory

66MHz 128 (64down + 64up)
66Mhz 192 (64down + 128up)
66Mhz 96 (64down + 32up)

Diskette Drive

Standard 3.5" Floppy
LS-120 Super Drive

CD-ROM 24X

4X DVD

Hard Drive

4.8-GB

6.4-GB

10.0-GB

Miscellaneous

Miscellaneous over pack
POD Label

Software
Other CTO Options

Microsoft Office 2000 Professional Bundled CD
AC Adapter

Briefcase
External Zip
Folio Case
Extra SLilon for Presario 1900T
Port Replicator
Security Lock
Xircom 10/100 NIC

Back to Models and Features

Back to Illustrated Parts Catalog

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Product Description

Presario 1900 Series

Models and
Features

Controls and
Lights

Status Panel
Left Side

Components
Right Side

Components
Bottom of

Unit
Left Side

and Top
Wedge
Components

Models and Features

Compaq Discovery 1900 Series Portable Computer

Models

Display
Processor

Hard Drive

Model
1900T

12. 1" TFT or 13.3" 12. 1" TFT
Intel Celeron/400-

MHz
w/128K Cache
or
Pentium II/366-MHz
w/256 Cache
or
Pentium II/400-MHz
w/256 Cache

4.8-GB or 6.4-GB or

Model
1905 and 1906

Intel Celeron/266­MHz
w/128K Cache

4.0-GB

Right Side
Wedge
Components

Rear
Connectors

Port
Replicator
Connectors

<

Port
Replicator
Components

Power
Management

Modem

CD Drive

Display

Processor

10.0-GB

56.0 Kbps PCI
Data/Fax

6X-DVD or 24X CD­ROM

Model
1910

12.1" TFT or 13. 3"
TFT

Intel Celeron/300­MHz
w/128K Cache or
PII/300-MHz w/512

56.0 Kbps PCI
Data/Fax

24X CD-ROM

Model
1915

12. 1" TFT or 13.3"
TFT

Pentium II/266-MHz
w/512K or 256K
Cache or PII/300­MHz w/512 Cache

Hard Drive
Modem

DVD or CD
Drive

Display

Cache

4.8-GB or 6.4-GB 4.0-GB

56.0 Kbps PCI
Data/Fax or 56.0
Kbps PCI Data/Fax I

56.0 Kbps PCI
Data/Fax or

56.0 Kbps PCI
Data/Fax
(International)

24X CD Drive or 4X
DVD

Model
1919 and 1920

DVD or 24X CD
Drive

Model
1922 and 1925

13. 3" TFT 12.1" TFT or 13. 3"
TFT

Processor

Hard Drive
Modem

Intel Celeron/300­MHz
w/128K Cache
or
Pentium II/300-MHz
w/256K Cache

Intel Celeron/300­MHz
w/512K Cache or
Intel Celeron/333­MHz
w/128K Cache or
Intel
Celeron/400(128)
w/DC or
Pentium II/333-MHz
w/256K Cache

4.0-GB or 6.4-GB 4.8-GB or 6.4-GB

K-56.0 Kbps PCI
Data/Fax or

56.0 Kbps PCI

56.0 Kbps PCI
Data/Fax or
International

Data/Fax or

DVD Drive

56.0 Kbps PCI

Data/Fax
(International)

DVD Drive DVD Drive or 24X CD-

ROM

Next Page

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Models and Features

Models and
Features

Status Panel
Left Side

Components

Right Side
Components

Bottom of
Unit

Left Side
and Top
Wedge
Components

Right Side
Wedge
Components

Rear
Connectors

Port

Compaq Discovery 1900 Series Portable Computer

Models

Model
1926, 1927, and

Model
1929 and 1930

1928

Display

12. 1" TFT or 13.3

13. 3" TFT

TFT

Processor

Intel Celeron/400­MHz
w/128K Cache
or
Pentium II/333-MHz
w/256K Cache

Pentium II/366-MHz
w/256K Cache
or
Intel Celeron/400­MHz w/128K Cache
or
Intel Celeron/433­MHz w/128K Cache

Hard Drive
Modem

4.8-GB or 6.4-GB 4.8-GB or 6.4-GB

56.0 Kbps PCI
Data/Fax

56.0 Kbps PCI
Data/Fax or
International

CD Drive

4X DVD or 24X CD-

4X DVD

ROM

Replicator
Connectors

Port
Replicator
Components

Power
Management

Configure To Order Features (CTOs)

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Product Description

Presario 1900 Series

Models and
Features

Controls
and Lights

Status Panel
Left Side

Components
Right Side

Components
Bottom of

Unit
Left Side

and Top

Controls and Lights

Front of Unit

1. Display 9. TouchPad

2.
Backlight
Switch
Button

3.Instant
Internet
Access
Button

4.Instant
Search
Button

10. Left
TouchPad
Button

11. Power
(On/Off)
Light

12. Scroll
(Up/Down)
Button

Wedge
Components

Right Side
Wedge
Components

Rear
Connectors

Port
Replicator
Connectors

Port
Replicator
Components

Power

5. Power
(On/Off)
Button

6. Instant
E­Commerce
(or
Favorite
Web site)
Button

7. Instant
E-Mail
Button

8.
Keyboard

13. Battery
Charge Light

14. Display
Panel Release
Button

15. Right
TouchPad
Button

16.Integrated
Speakers

Management

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Product Description

Presario 1900 Series

Models and
Features

Controls and
Lights

Status Panel

Left Side
Components

Right Side
Components

Bottom of
Unit

Left Side
and Top
Wedge
Components

Right Side

Status
Panel
Lights

1. AC
Adapter
Light

2. Num
Lock
Light

3. Caps
Lock
Light

4. Scroll
Lock
Light

Wedge
Components

Rear
Connectors

Port
Replicator
Connectors

Port
Replicator
Components

Power
Management

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Product Description

Presario 1900 Series

Models and
Features

Controls and
Lights

Status Panel

Left Side
Components

Right Side
Components

Bottom of
Unit

Left Side and
Top Wedge
Components

Left Side
Components

1. Security
Lock

2. Air Vent

3. PC Card
Slots

4. PC Card
Eject Levers

5. Hard Drive

Right Side
Wedge
Components

Rear
Connectors

Port
Replicator
Connectors

Port
Replicator
Components

Power
Management

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Product Description

Presario 1900 Series

Models and
Features

Controls and
Lights

Status Panel
Left Side

Components

Right Side
Components

Bottom of
Unit

Left Side and
Top Wedge
Components

Right Side
Components

1. Battery
Compartment

2. Volume
Up/Down
Button

3. Headphone
Jack

4. Microphone
Jack

5. Air Vent

Right Side
Wedge
Components

Rear
Connectors

Port
Replicator
Connectors

Port
Replicator
Components

Power
Management

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Product Description

Presario 1900 Series

Models and
Features

Controls and
Lights

Status Panel
Left Side

Components
Right Side

Components

Bottom of
Unit

Left Side
and Top
Wedge

Bottom
of Unit

1. Wedge
Interface
Connector

2.
Keyboard
Eject
Switch

3. Battery
Release
Lever

Components
Right Side

Wedge
Components

Rear
Connectors

Port
Replicator
Connectors

Port
Replicator
Components

Power
Management

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Product Description

Presario 1900 Series

Models and
Features

Controls and
Lights

Status Panel
Left Side

Components
Right Side

Components
Bottom of

Unit

Left Side
and Top
Wedge
Components

Wedge
Components

Left Side and

Top

Components

of the

Removable

Drive Wedge

1. DVD Drive
or CD ROM
Drive

2. Wedge
Release Button

3. System to
Wedge

Interface

Right Side
Wedge
Components

Rear
Connectors

Port
Replicator
Connectors

Port
Replicator
Components

Power
Management

Connector

4. Alignment

Pins

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Product Description

Presario 1900 Series

Models and
Features

Controls and
Lights

Status Panel
Left Side

Components
Right Side

Components
Bottom of

Unit
Left Side and

Top Wedge

Wedge
Components

Right Side
Components of
the Removable

Drive Wedge

1. Wedge
Release
Button

2. Diskette
Drive or LS­120 Drive
Slot

Components

Right Side
Wedge
Components

Rear
Connectors

Port
Replicator
Connectors

Port
Replicator
Components

Power
Management

3. Diskette
Drive or LS­120 Drive
Eject
Button

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Product Description

Presario 1900 Series

Models and
Features

Controls and
Lights

Status Panel
Left Side

Components
Right Side

Components
Bottom of

Unit
Left Side

and Top
Wedge
Components

Rear
Connectors

1. Modem Jack

2. USB Port

3.
Keyboard/Mouse
Port

4. Serial Port

5. Parallel Port

6. External
Monitor Port

7. AC Adapter

Right Side
Wedge
Components

Rear
Connectors

Port
Replicator
Connectors

Port
Replicator
Components

Power
Management

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Product Description

Models and
Features

Controls and
Lights

Status Panel
Left Side

Components
Right Side

Components
Bottom of

Unit
Left Side

and Top

Integrated 10/100BaseT

Ethernet Port Replicator

Connectors

1. Keyboard/Mouse

2. AC Adapter

3. Serial Port

4. Parallel Port

5. External Monitor Port

6. Local Area Network (LAN)

7. Keyboard/Mouse

8. USB Port

9. MIDI/Game Pad/Joystick Port

10. Security Lock

Wedge
Components

Right Side
Wedge
Components

Rear
Connectors

Port
Replicator
Connectors

Port
Replicator
Components

Power
Management

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Product Description

Presario 1900 Series

Models and
Features

Controls and
Lights

Status Panel
Left Side

Components
Right Side

Components
Bottom of

Unit
Left Side and

Top Wedge
Components

Right Side
Wedge
Components

CAUTION: The computer power switch

should be turned off before you connect or
disconnect the port replicator. Damage may
occur to the computer if it is "hot" plugged to
the port replicator.

Port
Replicator
Components

Integrated
10/100BaseT
Ethernet Port

Replicator

Components

1. Port
Replicator
Interface
Connector

2. Port
Replicator
Release Button

3.
Keyboard/Mouse
Connector

Rear
Connectors

Port
Replicator
Connectors

Port
Replicator
Components

Power
Management

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Product Description

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Models and
Features

Controls and
Lights

Status Panel
Left Side

Components
Right Side

Components
Bottom of

Unit
Left Side and

Top Wedge
Components

Power Management Settings

Compaq Presario 1900 Series Portable Computers are equipped with Advanced Power Management (APM). This
management system allows you to conserve battery power and customize the power saving settings to suit your individual
needs.

● Power Management Settings

● Sleep

● Hibernation

● Rebooting After a Lockup

● Servicing Your Computer - Full Off Mode

Depending on your patterns of computer use, you can set different conditions, or Power Schemes,
under which the computer will go into Sleep mode. The optional settings are Home/Office Desk ,

Portable/Laptop , and Always On .

From the default settings, you can change the following settings.

Right Side
Wedge
Components

Rear
Connectors

Port
Replicator
Connectors

Port
Replicator
Components

Power
Management

● When the computer goes into Sleep (Standby) mode

● When the screen times out and goes blank

● When the hard drive slows down

NOTE:

The setting for the hard drive must be less than or equal to the setting for the computer.

If you are connected to a network, Compaq recommends you set System Standby to

IMPORTANT:

Never .

Sleep

Sleep mode is a low power mode, also referred to as Standby mode.

CAUTION: While in Sleep mode, your computer will maintain system information and open

files. Unsaved information will be lost if you turn off your system prior to system wake­up, or if you lose power while using the AC adapter .

Hibernation Mode

Hibernation mode occurs by pressing the Power button once. Your computer saves the content of your computer

memory to the hard drive. This is followed by the computer turning off.

The following table shows the conditions and indicators for getting in and out of the various power modes: Sleep,
Hibernation, and Off.

Mode To Start To End Indicators
Sleep

Manual - Fn+F4
key combination

Press any key or
move the

Flashing Power LED

mouse

Time-Out Default ­15 minutes. If using
battery power, system
will not go to Sleep if
on AC power

Hibernate

Manual - Press Power
Button once

Press Power
button once

No Power LED,
blank screen

Time Out Default - if
low battery or after 1
hour of Sleep (system
will not Hibernate if on
AC power)

Off

Perform normal
Windows shutdown
using the Start
button, or press and
hold down the Power
button for 4 seconds

Rebooting After a Lockup

Press Power
button once

No Power LED,
blank screen

Occasionally you may encounter a non-working keyboard or a locked screen. To restart your
computer, press and hold down the Power button for at least four seconds. This will cause a manual shutdown. Press the

Power button once to start the computer.

If the computer still does not restart, follow these steps:

1. Press the Power button and hold it for four seconds to shut the computer down.

2. Remove the battery and unplug the AC power for at least 30 seconds.

3. Reinsert the battery or reconnect AC power and press the Power button once to restart.

Full Off (Main Power Off) Mode

If you need to install or replace components in your computer, you must turn the computer off completely . Follow the
instructions above for putting the computer into Standard Off mode. Unplug the computer electrical cord from the outlet
and remove the battery if installed.

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

This section explains the removal and replacement procedures for the computer.

Electrostatic
Discharge

Service
Considerations

Cables and
Connectors

Preparing the
Computer for
Disassembly

Battery Pack
Hard Drive
Keyboard
Memory

Module
Modem

Serial
Number

Report the
computer
serial
number to
Compaq
when
requesting
information
or ordering
spare
parts. The
serial
number is
located on

bottom of
unit.

Heatspreader
Processor
Display Panel

Assembly
Upper CPU

Cover with
Palmrest and
TouchPad

Hard Drive/
Battery
Charger Board

Converter
Board

Low Voltage
Differential
Signal Board

Fan Assembly
System Board
Speaker

Assembly
Disassembling

the Wedge
DVD or CD

Drive
System to

Wedge
Interface
Board

Diskette Drive
Wedge to Port

Replicator
Interface
Board

How to use
Processor Jig

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Electrostatic Discharge

A sudden discharge of static electricity from a finger or other conductor can
destroy static-sensitive devices or microcircuitry. Often the spark is neither
felt nor heard, but damage occurs. An electronic device exposed to
electrostatic discharge (ESD) may not be affected at all and will work
perfectly throughout a normal cycle. Although it may function normally for a
while, then degrade in the internal layers, reducing its life expectancy.

Networks built into many integrated circuits provide some protection, but in
many cases, the discharge contains enough power to alter device parameters
or melt silicon junctions.

Generating Static

The table shows how different activities generate static electricity at different
electrostatic voltage levels.

Typical Electrostatic Voltages

Relative Humidity

Event 10% 40% 55%

Walking across carpet 35,000 V 15,000 V 7,500 V
Walking across vinyl floor 12,000 V 5,000 V 3,000 V
Motions of bench worker 6,000 V 800 V 400 V
Removing DIPS from plastic tubes 2,000 V 700 V 400 V
Removing DIPS from vinyl trays 11,500 V 4,000 V 2,000 V
Removing DIPS from Styrofoam 14,500 V 5,000 V 3,500 V
Removing bubble pack from PCBs 26,000 V 20,000 V 7,000 V
Packing PCBs in foam-lined box 21,000 V 11,000 V 5,000 V
NOTE: 700 volts can degrade a product.

Return to Removal & Replacement Procedures

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replcement Procedures

Service Considerations

Listed below are some of the considerations that you should keep in mind
during the disassembly and assembly of the computer.

Tool and Software Requirements

To service the computer, you need the following:

● 5 millimeter nut drivers (for screwlocks and standoffs)

● Small, Phillips (P-Zero) screwdriver

● Small, standard screwdriver

● Small, pair of tweezers

● Diagnostics software

Screws

The screws used in the computer are not interchangeable. If an incorrect
screw is used during the reassembly process, it can damage the unit. Compaq
strongly recommends that all screws removed during disassembly be kept
with the part that was removed, then returned to their proper locations.

IMPORTANT:

placed away from the work area to prevent damage.

Return to Removal & Replacement Procedures

As each subassembly is removed from the computer, it should be

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Cables and Connectors

Most cables used throughout the unit are ribbon cables. Cables must be handled with
extreme care to prevent damage. Apply only the tension required to seat or unseat the
cables during insertion or removal from the connector. Handle cables by the connector
whenever possible. In all cases, avoid bending, twisting, or tearing the cables, and
ensure that the cables are routed in such a way that they cannot be caught or snagged
by parts being removed or replaced.

Cables

Use the following precautions when handling cables to avoid damage to the cable or
computer:

● Always handle cables by their connectors.

● Avoid bending, twisting, or pulling on the cables.

● Apply minimum required force when seating or unseating the cables from their

connectors.

● Place the cables in such a manner that they cannot be caught or snagged by parts being

removed or replaced.

● Handle flex cables with extreme care; they can tear easily.

CAUTION: When serving these computers, ensure that cables are placed in
their proper location during the reassembly process. Improper cable placement
can cause severe damage to the unit.

Select the desired illustration

Removing a cable from a ZIF Connector .

The cable position for the

speaker assembly.

Plastic Parts

Plastic parts can be damaged by the use of excessive force during disassembly and
reassembly. When handling the plastic parts, use care. Apply pressure only at the
points designated in the maintenance instructions.

Return to Removal & Replacement Procedures

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

ZIF Connector

Presario 1900 Series

The computer uses a
zero insertion force
(ZIF) connector for the
keyboard cable to the
system board. To
remove a cable from a
ZIF connector, lift both
corners of the ZIF
connector and slide
simultaneously with
constant light force.

CAUTION: A ZIF

connector and its
attached cable
can be easily
damaged. Handle
only the
connector slide
when removing or
replacing a cable.
Never pull or
twist on the cable
while it is
connected.

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Speaker Assembly

The cable position for the
speaker assembly.

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Electrostatic
Discharge

Service
Considerations

Cables and
Connectors

Preparing
the
Computer
for
Disassembly

Battery Pack
Hard Drive
Keyboard

Preparing the Computer for Disassembly

Before beginning removal and replacement procedures, complete the following procedures:

1. Disconnect AC power and any external devices.

2. Remove the battery pack.

3. Remove any PC Cards.

4. Remove the wedge.

The battery pack should be removed before performing any internal maintenance on

IMPORTANT:

the computer.

Memory
Module

Modem
Heatspreader
Processor
Display Panel

Assembly
Upper CPU

Cover with
Palmrest and
TouchPad

Hard Drive/
Battery

WARNING: Metal objects can damage the battery pack as well as the battery contacts in

the battery compartment. To prevent damage, do not allow metal objects to touch the
battery contacts. Place only the battery pack for the Compaq Presario 1900 Series
Portable Computers into the battery compartment. Do not force the battery pack into
the bay if insertion does not occur easily.

CAUTION: Do not crush, puncture, or incinerate the battery pack. Do not open a battery

pack, as this damages the pack, makes it unusable, and exposes potentially harmful
battery components. There are no field-serviceable parts located inside the battery pack.

Charger Board
Converter

Board
Low Voltage

Differential
Signal Board

Fan Assembly
System Board
Speaker

Assembly
Disassembling

the Wedge
DVD or CD

The Compaq Presario 1900 Series Portable Computers have several screws of various sizes
which are not interchangeable. Care must be taken during reassembly to ensure that the

NOTE:

correct screws are used in their correct location. During removal please keep respective
screws with their associate sub-assembly.

Drive
System to

Wedge
Interface
Board

Diskette Drive
Wedge to Port

Replicator
Interface
Board

How to use
Processor
Jig

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Electrostatic
Discharge

Service
Considerations

Cables and
Connectors

Preparing the
Computer for
Disassembly

Battery Pack

Hard Drive
Keyboard
Memory Module
Modem
Heatspreader

Removing the
Battery Pack

To remove the
battery pack,
complete the
following steps:

Prepare the

1.

computer for
disassembly.

2. Turn the unit

over.

3. Slide the battery

pack release
button located in
the center of the
bottom of the
unit.

Processor
Display Panel

Assembly
Upper CPU

Cover with
Palmrest and
TouchPad

Hard Drive/
Battery
Charger Board

Converter
Board

Low Voltage
Differential
Signal Board

4. Locate the

battery pack on
the right, place
your thumb in
the groove, and
pull the battery
pack forward
from the unit.

To replace the battery
pack, complete the
following step.

Insert the battery
pack into the
chassis slot
located on the
right side of the
unit and push in.

Fan Assembly
System Board
Speaker

Assembly
Disassembling

the Wedge
DVD or CD

Drive
System to

Wedge
Interface
Board

Diskette Drive
Wedge to Port

Replicator
Interface
Board

How to use
Processor Jig

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Electrostatic
Discharge

Service
Considerations

Cables and
Connectors

Preparing the
Computer for
Disassembly

Battery Pack

Hard Drive

Keyboard
Memory

Module
Modem

Removing the
Hard Drive

To remove the hard
drive, complete the
following steps:

1. Prepare the

computer for
disassembly .

2. Turn the unit

over and
remove the
screw (located
in the right
corner) from
the hard drive.

3. Pull the hard

drive from the
chassis slot.

Heatspreader
Processor
Display Panel

Assembly
Upper CPU

Cover with
Palmrest and
TouchPad

Hard Drive/
Battery
Charger Board

Converter
Board

To replace the hard
drive, reverse the
previous procedures.

Low Voltage
Differential
Signal Board

Fan Assembly
System Board
Speaker

Assembly
Disassembling

the Wedge
DVD or CD

Drive
System to

Wedge
Interface
Board

Diskette Drive
Wedge to Port

Replicator
Interface
Board

How to use
Processor Jig

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Electrostatic
Discharge

Service
Considerations

Cables and
Connectors

Preparing the
Computer for
Disassembly

Battery Pack
Hard Drive

Keyboard

Memory
Module

Modem
Heatspreader

Removing the
Keyboard

To remove the
keyboard, complete the
following steps:

1. Prepare the

computer for
disassembly.

2. Partially close

the unit and
place it on its
side.

3. Slide the

keyboard eject
switch located in
the center of the
bottom of the
unit to the right
to release the
keyboard.

Processor
Display Panel

Assembly
Upper CPU

Cover with
Palmrest and
TouchPad

Hard Drive/
Battery
Charger Board

Converter
Board

Low Voltage
Differential

Next Step

Signal Board
Fan Assembly
System Board
Speaker

Assembly
Disassembling

the Wedge
DVD or CD

Drive
System to

Wedge
Interface
Board

Diskette Drive
Wedge to Port

Replicator
Interface
Board

How to use
Processor Jig

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Removing the
Keyboard,
continued

4. Place the unit right side

up.

Gently lift up
the front of the
keyboard using
tweezers.
Disconnect the
flex cables from
the ZIF connectors
on the system
board.

To remove a
cable from a ZIF
connector, lift
both corners of
the ZIF

NOTE:

slide
simultaneously
with constant
light force and
then remove the
cable.

5. Lift the keyboard
out of the chassis.

To replace the
keyboard, reverse the
above procedures.

connector and

Return to

Removal and
Replacement
Procedures.

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Electrostatic
Discharge

Service
Considerations

Cables and
Connectors

Preparing the
Computer for
Disassembly

Battery Pack
Hard Drive
Keyboard

Memory

Removing the
Memory Module

To remove the
memory module,
complete the
following steps:

Prepare the

1.

computer for
disassembly.

2. Release and lift

up the
keyboard.

Module

Modem
Heatspreader
Processor
Display Panel

Assembly
Upper CPU

Cover with
Palmrest and
TouchPad

Hard Drive/
Battery
Charger Board

3. Pull side levers
to release the
memory
module, then
unplug the
memory
module from
the system
board.

To replace the
memory module,
reverse the previous
procedures.

Converter
Board

Low Voltage
Differential
Signal Board

Fan Assembly
System Board
Speaker

Assembly
Disassembling

the Wedge
DVD or CD

Drive
System to

Wedge
Interface
Board

Diskette Drive
Wedge to Port

Replicator
Interface
Board

How to use
Processor Jig

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Electrostatic
Discharge

Service
Considerations

Cables and
Connectors

Preparing the
Computer for
Disassembly

Battery Pack
Hard Drive
Keyboard
Memory

Module

Modem

Removing the
Modem

To remove the modem,
complete the following
steps:

1. Prepare the

computer for
disassembly.

2. Release and lift

up the keyboard.

3. Remove two

screws securing
the modem and
pull the modem
off the connector
on the system
board.

Heatspreader
Processor

Display
Panel
Assembly

Upper CPU
Cover with
Palmrest and
TouchPad

Hard Drive/
Battery
Charger Board

Converter

Next Step

Board
Low Voltage

Differential
Signal Board

Fan Assembly
System Board
Speaker

Assembly
Disassembling

the Wedge
DVD or CD

Drive
System to

Wedge
Interface
Board

Diskette Drive
Wedge to Port

Replicator
Interface
Board

How to use
Processor Jig

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Removing the Modem,
continued

4. Disconnect the modem cable
from the modem and lift the
modem from the chassis.

To replace the modem,
reverse the previous
procedures.

Return to

Removal &
Replacement
Procedures.

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Electrostatic
Discharge

Service
Considerations

Cables and
Connectors

Preparing the
Computer for
Disassembly

Battery Pack
Hard Drive
Keyboard
Memory

Module

Removing the
Heatspreader
with Thermal
Pad

To remove the
heatspreader with
thermal pad,
complete the
following steps:

Prepare the

1.

computer for
disassembly.

2. Release and lift

the keyboard.

Modem

Heatspreader

Processor
Display Panel

Assembly
Upper CPU

Cover with
Palmrest and
TouchPad

Hard Drive/
Battery
Charger Board

Converter

3. Remove four
screws from the
heatspreader
with thermal
pad and lift out
of the chassis.

When
replacing the
heatspreader,
ensure that

NOTE:

the thermal
pad under the
heatspreader
is properly

Board
Low Voltage

Differential
Signal Board

Fan Assembly
System Board
Speaker

Assembly
Disassembling

the Wedge
DVD or CD

Drive
System to

replaced.

Next Step

Wedge
Interface
Board

Diskette Drive
Wedge to Port

Replicator
Interface
Board

How to use
Processor Jig

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Electrostatic
Discharge

Service
Considerations

Cables and
Connectors

Preparing the
Computer for
Disassembly

Battery Pack
Hard Drive
Keyboard
Memory

Module

Removing the
Modem Cover

To remove the
heatspreader with
thermal pad,
complete the
following steps:

Prepare the

1.

computer for
disassembly.

2. Release and lift

the keyboard.

Modem

Heatspreader

Processor
Display Panel

Assembly
Upper CPU

Cover with
Palmrest and
TouchPad

Hard Drive/
Battery
Charger Board

Converter
Board

3. Remove the

heatspreader
with thermal
pad.

4. Remove two
screws from the
modem cover
and lift out of
chassis.

Next Step

Low Voltage
Differential
Signal Board

Fan Assembly
System Board
Speaker

Assembly
Disassembling

the Wedge
DVD or CD

Drive
System to

Wedge
Interface
Board

Diskette Drive
Wedge to Port

Replicator
Interface
Board

How to use
Processor
Jig

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Electrostatic
Discharge

Service
Considerations

Cables and
Connectors

Preparing the
Computer for
Disassembly

Battery Pack
Hard Drive
Keyboard
Memory

Module

Removing the
Fan Mounting
Bracket and
Disconnecting
the Fan Cable

To remove the
heatspreader with
thermal pad,
complete the
following steps:

Prepare the

1.

computer for
disassembly.

Modem

Heatspreader

Processor
Display Panel

Assembly
Upper CPU

Cover with
Palmrest and
TouchPad

Hard Drive/
Battery
Charger Board

Converter
Board

Low Voltage
Differential

2. Release and lift

the keyboard.

3. Remove the

heatspreader
with thermal
pad.

4. Remove the

modem cover.

5. Remove two
screws from the

fan mounting

bracket,
disconnect

fan cable, and
lift out of

Signal Board
Fan Assembly
System Board
Speaker

Assembly
Disassembling

the Wedge
DVD or CD

Drive
System to

Wedge
Interface
Board

Diskette Drive

chassis.

To replace the
heatspreader with
thermal pad, reverse
the previous
procedures.

Return to Removal
Sequence Index

Wedge to Port
Replicator
Interface
Board

How to use
Processor
Jig

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Electrostatic
Discharge

Service
Considerations

Cables and
Connectors

Preparing the
Computer for
Disassembly

Battery Pack
Hard Drive
Keyboard
Memory

Module

Removing the
Processor

To remove the processor,
complete the following
steps:

1. Prepare the computer

for disassembly.

2. Release and lift the

keyboard.

3. Remove the

heatspreader with
thermal pad.

4. Remove two
screws that

Modem
Heatspreader

Processor

Display Panel
Assembly

Upper CPU
Cover with
Palmrest and
TouchPad

Hard Drive/
Battery
Charger Board

Converter

secure the
processor to the
system board.

IMPORTANT:

The
bottom of
the
processor
contains
socket
pins
which can
be easily
damaged,
if not
properly

Board
Low Voltage

Differential
Signal Board

Fan Assembly
System Board
Speaker

Assembly
Disassembling

the Wedge
DVD or CD

Drive
System to

Wedge
Interface
Board

Diskette Drive
Wedge to Port

Replicator
Interface

removed.

WARNING:

The Pentium
II processor
may be very
hot when
the unit has
been
running.
Allow the
processor to
cool before
handling it.

Insert a small blade

5.

screw driver under
the right side of the
processor. Gently lift
up the left side of the
processor while
rocking up and down
the right side, until
the it releases from
the socket. This is
necessary to prevent
damage to the socket
pins.

Board

How to use
Processor Jig

To replace the processor
complete the following
steps:

1. Align the processor

over the socket using
the screw holes as a
guide. Apply equal
pressure on both
sides of the processor
over the socket (left
side).

2. Replace two screws.

3. Replace the

heatspreader with
thermal pad.

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Electrostatic
Discharge

Service
Considerations

Cables and
Connectors

Preparing the
Computer for
Disassembly

Battery Pack
Hard Drive
Keyboard
Memory

Module
Modem
Heatspreader
Processor

Display
Panel
Assembly

Upper CPU

Removing the

13.3" Display
Panel
Assembly

To remove the 13.3"
display panel
assembly, complete the
following steps:

1. Prepare the

computer for
disassembly.

2. Remove the

keyboard.

3. Close the display

panel assembly
to access the
hinge covers
from the rear of
the unit. Using
tweezers, gently
lift from the
bottom edge of
the hinge
covers. Lift the
hinge covers off
the unit.

Cover with
Palmrest and
TouchPad

Hard Drive/
Battery
Charger Board

Converter
Board

Low Voltage
Differential
Signal Board

Fan Assembly
System Board

Use a pair
of tweezers
to properly

NOTE:

remove the
display
hinges from
the unit.

Next Step

Speaker
Assembly

Disassembling
the Wedge

DVD or CD
Drive

System to
Wedge
Interface
Board

Diskette Drive
Wedge to Port

Replicator
Interface
Board

How to use
Processor Jig

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Removing
the 13.3"
Display
Panel
Assembly,
continued

4. Open the

display panel
assembly and
remove the
screw from the
backlight
cable.
Disconnect the
backlight cable
from the ZIF
connector on
the system
board.

Next Step

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Removing the

13.3" Display
Panel Assembly,
continued

5. Disconnect the data

cable from the LIF
connector on the Low
Voltage Differential
Signal (LVDS) board.

Next Step

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Removing the

13.3" Display
Panel Assembly,
continued

6. Close the display panel

assembly.

7. Remove the hinge

screws on each side
and a clamp (right
side) on top of the
base pan assembly.

Next Step

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Removing the

13.3" Display
Panel Assembly,
continued

8. Remove three hinge

screws (rear of unit)
from each side of the
base pan assembly.

Next Step

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Removing the

13.3" Display
Panel Assembly,
continued

9. Gently pull the flex

cables attached to the
display panel assembly
through the slot on the
Upper CPU cover and
remove the display
assembly with flex
cables attached from
the chassis.

To replace the display
panel assembly, reverse
the previous
procedures.

Return to

Removal and
Replacement
Procedures.

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Electrostatic
Discharge

Service
Considerations

Cables and
Connectors

Preparing the
Computer for
Disassembly

Battery Pack
Hard Drive
Keyboard
Memory

Removing the
Upper CPU
Cover with
Palmrest and
TouchPad

To remove the Upper
CPU Cover with Palmrest
and TouchPad, complete
the following steps:

1. Prepare the

computer for
disassembly.

2. Remove the

keyboard.

Module
Modem
Heatspreader
Processor
Display Panel

Assembly

Upper CPU
Cover with
Palmrest and
TouchPad

Hard Drive/
Battery
Charger Board

Converter
Board

3. Remove the

Heatspreader.

4. Remove the

display assembly
with flex cables
attached.

5. Remove four

screws located at
the top of the
Upper CPU Cover
with Palmrest and
TouchPad.

6. Remove a fifth

screw located just
to the top right of
the fan (not
shown).

Low Voltage
Differential
Signal Board

Fan Assembly
System Board
Speaker

Assembly
Disassembling

the Wedge
DVD or CD

Drive
System to

Wedge

Next Step

Interface
Board

Diskette Drive
Wedge to Port

Replicator
Interface
Board

How to use
Processor Jig

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Removing the
Upper CPU Cover
with Palmrest
and TouchPad,
continued

6. Turn the unit upside

down.

7. Remove two rubber

feet and seven screws
located at the bottom
of the unit which
secures the Upper CPU
Cover with Palmrest
and TouchPad.

8. Remove two screws on

the rear of the unit.

Next Step

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Removing the
Upper CPU Cover
with Palmrest
and TouchPad,
continued

9. Turn the unit right side

up.

10. Disconnect the

TouchPad cable from
the connector on the
system board.

To replace the Upper
CPU Cover with
Palmrest and TouchPad,
reverse the previous
procedures.

Return to

Removal &
Replacement
Procedures.

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Electrostatic
Discharge

Service
Considerations

Cables and
Connectors

Preparing the
Computer for
Disassembly

Battery Pack
Hard Drive
Keyboard
Memory

Module
Modem

Removing the Hard
Drive/Battery
Charger Board

To remove the hard
drive/battery charger
board, complete the
following steps:

Prepare the computer for

1.

disassembly.

2. Remove the keyboard.

3. Remove the heatspreader.

4. Remove the display

assembly with flex cables
attached.

Heatspreader
Processor
Display Panel

Assembly
Upper CPU

Cover with
Palmrest and
TouchPad

Hard Drive/
Battery
Charger Board

Converter
Board

Low Voltage

5. Remove the Upper CPU

Cover with
Palmrest/TouchPad/Fan.

6. Remove four screws from

the hard drive/battery
charger board located front
center portion of the
chassis.

To replace the hard
drive/battery charger board
reverse the previous
procedures.

Differential
Signal Board

Fan Assembly
System Board
Speaker

Assembly
Disassembling

the Wedge
DVD or CD

Drive
System to

Wedge
Interface
Board

Diskette Drive
Wedge to Port

Replicator
Interface
Board

How to use
Processor Jig

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Electrostatic
Discharge

Service
Considerations

Cables and
Connectors

Preparing the
Computer for
Disassembly

Battery Pack
Hard Drive
Keyboard
Memory

Module

Removing the
Converter
Board

To remove the
converter board,
complete the following
steps:

1. Prepare the

computer for
disassembly.

2. Remove the

keyboard.

3. Remove the

display panel
assembly.

Modem
Heatspreader
Processor
Display Panel

Assembly
Upper CPU

Cover with
Palmrest and
TouchPad

Hard Drive/
Battery
Charger Board

Converter
Board

4. Remove the

Upper CPU cover
with Palmrest
Cover and
TouchPad.

5. Remove the

hard drive.

6. Remove the

modem.

7. Pull and lift the

converter board
from the system
board connector
and remove
from the chassis.

Low Voltage
Differential
Signal Board

Fan Assembly

System
Board

Speaker
Assembly

Disassembling
the Wedge

DVD or CD
Drive

System to

To replace the
converter board,
reverse the previous
procedures.

Wedge
Interface
Board

Diskette Drive
Wedge to Port

Replicator
Interface
Board

How to use
Processor Jig

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Electrostatic
Discharge

Service
Considerations

Cables and
Connectors

Preparing the
Computer for
Disassembly

Battery Pack
Hard Drive
Keyboard
Memory

Module

Removing the
Low Voltage
Differential
Signal (LVDS)
Interface
Board

To remove the LVDS
Interface Board,
complete the following
steps:

1. Prepare the

computer for
disassembly.

2. Remove the

keyboard.

Modem
Heatspreader
Processor
Display Panel

Assembly
Upper CPU

Cover with
Palmrest and
TouchPad

Hard Drive/
Battery
Charger Board

Converter

3. Remove the

heatspreader.

4. Remove the two

screws from the
LVDS Interface
Board and lift
from the chassis.

To replace the LVDS
Interface Board reverse
the previous
procedures.

Board

Low Voltage
Differential
Signal Board

Fan Assembly
System Board
Speaker

Assembly
Disassembling

the Wedge
DVD or CD

Drive
System to

Wedge
Interface
Board

Diskette Drive
Wedge to Port

Replicator
Interface
Board

How to use
Processor Jig

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Electrostatic
Discharge

Service
Considerations

Cables and
Connectors

Preparing the
Computer for
Disassembly

Battery Pack
Hard Drive
Keyboard
Memory

Removing the
Fan Assembly

To remove the fan
assembly,
complete the
following steps:

Prepare the

1.

computer for
disassembly.

2. Remove the

keyboard.

3. Remove the

hard drive.

Module
Modem
Heatspreader
Processor
Display Panel

Assembly
Upper CPU

Cover with
Palmrest and
TouchPad

Hard Drive/
Battery
Charger Board

Converter
Board

Low Voltage
Differential

4. Remove the

display panel
assembly.

5. Remove the

upper CPU cover
with palmrest
cover and

TouchPad.

6. Remove the

modem.

7. Remove the

system board.

8. Disconnect the

fan cable and lift
the fan assembly
from the slot on
the system
board.

Signal Board

Fan Assembly

System Board
Speaker

Assembly
Disassembling

the Wedge
DVD or CD

Drive
System to

Wedge
Interface
Board

To replace the fan
assembly, reverse the
above procedures.

Diskette Drive
Wedge to Port

Replicator
Interface
Board

How to use
Processor Jig

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Electrostatic
Discharge

Service
Considerations

Cables and
Connectors

Preparing the
Computer for
Disassembly

Battery Pack
Hard Drive
Keyboard
Memory

Removing the
System Board

To remove the system board,
complete the following steps:

1.

Prepare the computer for

disassembly.

2. Remove the keyboard.

3. Remove the display panel

assembly.

4. Remove the heatspreader.

5. Remove the processor.

Module
Modem
Heatspreader
Processor
Display Panel

Assembly
Upper CPU

Cover with
Palmrest and
TouchPad

Hard Drive/
Battery
Charger Board

Next Step

Converter
Board

Low Voltage
Differential
Signal Board

Fan Assembly

System
Board

Speaker
Assembly

Disassembling
the Wedge

DVD or CD
Drive

System to
Wedge
Interface
Board

Diskette Drive
Wedge to Port

Replicator
Interface
Board

How to use
Processor Jig

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

6. Remove the Upper CPU

cover with Palmrest
Cover and TouchPad.

7. Remove the hard drive.

8. Remove the modem.

9. Remove the hard

drive/battery charger
board.

10. Remove the converter

board.

11. Remove the PC Card

Slot.

Next Step

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

12. Remove two screws

from the Display Panel
Assembly Hinge
Bracket with hinge to
base ground clip and
lift off the chassis.

Next Step

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

13. Remove the left hinge

bracket before
removing the converter
board.

14. Remove 1 screw at the

right lower corner of
the converter board.

15. Lift the RJ11 connector

off the guide posts
located on the right
side on the chassis.

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Electrostatic
Discharge

Service
Considerations

Cables and
Connectors

Preparing the
Computer for
Disassembly

Battery Pack
Hard Drive
Keyboard
Memory

Module

Removing the
Speaker
Assembly

To remove the
speaker assembly,
complete the
following steps:

Prepare the

1.

computer for
disassembly.

2. Remove the

keyboard .

3. Remove the

display panel
assembly.

Modem
Heatspreader
Processor
Display Panel

Assembly
Upper CPU

Cover with
Palmrest and
TouchPad

Hard Drive/
Battery
Charger Board

Converter
Board

4. Remove the

Upper CPU cover
with Palmrest
Cover and
TouchPad.

5. Remove two

screws from the
speaker
assembly,
disconnect the
speaker cables
from the system
board, and lift
out of the unit.

To replace the speaker
assembly, reverse the
previous procedures.

Low Voltage
Differential
Signal Board

Fan Assembly
System Board

Speaker
Assembly

Disassembling
the Wedge

DVD or CD
Drive

System to
Wedge
Interface
Board

Diskette Drive
Wedge to Port

Replicator
Interface
Board

How to use
Processor Jig

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Electrostatic
Discharge

Service
Considerations

Cables and
Connectors

Preparing the
Computer for
Disassembly

Battery Pack
Hard Drive
Keyboard
Memory Module
Modem

Disassembling
the
Removable
Drive Wedge

1. Prepare the

computer for
disassembly.

2. Push the levers

located on each
side of the wedge
and lift the
wedge off the
connector on the
bottom of the
unit.

Next Step

Heatspreader
Processor
Display Panel

Assembly
Upper CPU

Cover with
Palmrest and
TouchPad

Hard Drive/
Battery Charger
Board

Converter
Board

Low Voltage
Differential
Signal Board

Fan Assembly
System Board
Speaker

Assembly

Disassembling
the Wedge

DVD or CD
Drive

System to
Wedge
Interface Board

Diskette Drive
Wedge to Port

Replicator
Interface Board

How to use
Processor Jig

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Disassembling the
Removable Drive
Wedge, continued

3. Remove eleven screws

from the top of the
wedge cover.

Next Step

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Disassembling the
Removable Drive
Wedge, continued

4. Remove three screws

from the base
enclosure of the wedge
and lift off the wedge
cover.

Next Step

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Disassembling the
Removable Drive
Wedge, continued

5. Remove two alignment

pins from the rear of
the base enclosure of
the wedge.

Next Step

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Disassembling the
Removable Drive
Wedge, continued

6. Remove the

reinforcement bracket
from the front of the
wedge.

Next Step

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Electrostatic
Discharge

Service
Considerations

Cables and
Connectors

Preparing the
Computer for
Disassembly

Battery Pack
Hard Drive
Keyboard
Memory

Module
Modem
Heatspreader
Processor
Display Panel

Assembly

Removing the
DVD or CD­ROM Drive

To remove the CD-ROM
or the DVD Drive with
shield attached,
complete the following
steps:

1. Prepare the

computer for
disassembly.

2. Disassemble the

wedge.

3. Remove two

screws at the
rear of the CD­ROM or DVD
Drive and lift the
CD-ROM or DVD
Drive with shield
attached off the
connector
wedge.

Upper CPU
Cover with
Palmrest and
TouchPad

Hard Drive/
Battery
Charger Board

Converter
Board

Low Voltage
Differential
Signal Board

Fan Assembly

To replace the CD-ROM
or DVD Drive with
shield attached,
reverse the previous
procedures.

Next Step

System Board
Speaker

Assembly
Disassembling

the Wedge

DVD or CD­ROM Drive

System to
Wedge
Interface
Board

Diskette Drive
Wedge to Port

Replicator
Interface
Board

How to use
Processor Jig

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Removing the
DVD or CD-ROM
Drive, continued

To remove the CD-ROM or
DVD Drive

the following step:

4. Remove the screw which
secure the CD-ROM or DVD

Drive

To replace the CD-ROM or
DVD Drive shield, reverse the
previous procedure.

shield.

shield perform

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Electrostatic
Discharge

Service
Considerations

Cables and
Connectors

Preparing the
Computer for
Disassembly

Battery Pack
Hard Drive
Keyboard
Memory

Removing the
System to
Wedge
Interface
Board

To remove the System
to Wedge Interface
board , complete the
following steps:

1. Prepare the

computer for
disassembly.

2. Disassemble the

wedge.

Module
Modem
Heatspreader
Processor
Display Panel

Assembly
Upper CPU

Cover with
Palmrest and
TouchPad

Hard Drive/
Battery
Charger Board

3. Remove two

To replace the System
to Wedge Interface
board , reverse the
previous procedures.

standoffs from
the System to
Wedge Interface
board and lift
the board from
the wedge.

Converter
Board

Low Voltage
Differential
Signal Board

Fan Assembly
System Board
Speaker

Assembly
Disassembling

the Wedge
DVD or CD

Drive

System to
Wedge
Interface
Board

Diskette Drive
Wedge to Port

Replicator
Interface
Board

How to use
Processor Jig

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Electrostatic
Discharge

Service
Considerations

Cables and
Connectors

Preparing the
Computer for
Disassembly

Battery Pack
Hard Drive
Keyboard
Memory

Removing the
Diskette
Drive or the
LS-120 Drive

To remove the Diskette
Drive or the LS-120
Drive with shield
attached, complete the
following steps:

1. Prepare the

computer for
disassembly.

2. Disassemble the

wedge.

Module
Modem
Heatspreader
Processor
Display Panel

Assembly
Upper CPU

Cover with
Palmrest and
TouchPad

Hard Drive/
Battery
Charger Board

Converter

3. Remove three

screws which
secure the
Diskette Drive or
LS-120 Drive
with shield
attached to the
base enclosure
of the wedge.

4. Lift the Diskette

Drive or the LS­120 Drive with
shield attached
from the unit.

To replace the Diskette
Drive or LS-120 Drive
with shield attached,
reverse the previous
procedures.

Board
Low Voltage

Differential
Signal Board

Fan Assembly
System Board
Speaker

Assembly
Disassembling

the Wedge
DVD or CD

Drive
System to

Next Step

Wedge
Interface
Board

Diskette
Drive

Wedge to Port
Replicator
Interface
Board

How to use
Processor Jig

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

To remove the Diskette Drive
or the LS-120 Drive shield,

perform the following step:

Remove the screw from
each side of the
Diskette Drive or the LS­120 Drive shield and lift
off.

To replace the Diskette
Drive or the LS-120
Drive shield , reverse
the previous procedure.

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Electrostatic
Discharge

Service
Considerations

Cables and
Connectors

Preparing the
Computer for
Disassembly

Battery Pack
Hard Drive
Keyboard
Memory

Removing the
Wedge to the
Port
Replicator
Interface
Board

To remove the Wedge
to the Port Replicator
Interface board,
complete the following
steps:

1. Prepare the

computer for
disassembly.

Module
Modem
Heatspreader
Processor
Display Panel

Assembly
Upper CPU

Cover with
Palmrest and
TouchPad

Hard Drive/
Battery
Charger Board

Converter
Board

Low Voltage

2. Disassemble the

wedge.

3. Remove the

CD ROM
Drive or the
DVD Drive
with shield
attached
from the unit.

4. Remove the

Diskette
Drive or the
LS-120 Drive
with shield
attached
from the unit.

Differential
Signal Board

Fan Assembly
System Board
Speaker

Assembly
Disassembling

the Wedge
DVD or CD

Drive
System to

Wedge
Interface

5. Remove two

standoffs from
the Wedge to
the Port
Replicator
Interface board
and lift the
board from the
unit.

To replace the Wedge
to Port Replicator
Interface board,
reverse the previous
procedures.

Board
Diskette Drive

Wedge to
Port
Replicator
Interface
Board

How to use
Processor Jig

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Electrostatic
Discharge

Service
Considerations

Cables and
Connectors

Preparing the
Computer for
Disassembly

Battery Pack
Hard Drive
Keyboard
Memory

Lock Processor Step 1

Locking the
Processor

Refer to the illustrations at left
to verify. Follow these steps to
lock processor:

1. Place the Jig Block on the

CPU frame in the lower right­hand corner. Make sure that
the block is fully seated. The
handle must be at a 45
degree angle (as illustrated)
when installing the Jig block.

2. Twist handle 90
degrees clockwise to
unlock processor.

Module
Modem
Heatspreader
Processor
Display Panel

Assembly
Upper CPU

Cover with
Palmrest and
TouchPad

Hard Drive/
Battery
Charger Board

To unlock processor

Lock Processor Step 2

Converter
Board

Low Voltage
Differential
Signal Board

Fan Assembly
System Board
Speaker

Assembly
Disassembling

the Wedge
DVD or CD

Drive
System to

Wedge
Interface
Board

Diskette Drive
Wedge to Port

Replicator
Interface
Board

How to use
Processor Jig

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Removal and Replacement Procedures

Electrostatic
Discharge

Service
Considerations

Cables and
Connectors

Preparing the
Computer for
Disassembly

Battery Pack
Hard Drive
Keyboard
Memory

Module

Unlock Processor Step 1

Unlocking the
Processor

Refer to the illustrations at left
to verify. Follow these steps to
lock processor:

1. Place the Jig Block on the

CPU frame in the lower left­hand corner. Make sure that
the block is fully seated. The
handle must be at a 45
degree angle (as illustrated)
when installing the Jig block.

2. Twist handle 90
degrees counter
clockwise to unlock
processor.

Modem
Heatspreader
Processor
Display Panel

Assembly
Upper CPU

Cover with
Palmrest and
TouchPad

Hard Drive/
Battery
Charger Board

Converter

To lock processor

Unlock Processor Step 2

Board
Low Voltage

Differential
Signal Board

Fan Assembly
System Board
Speaker

Assembly
Disassembling

the Wedge
DVD or CD

Drive
System to

Wedge
Interface
Board

Diskette Drive
Wedge to Port

Replicator
Interface
Board

How to use
Processor Jig

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Troubleshooting

Presario 1900 Series

Preliminary
Steps

Clearing the
Power-On
Password

Power-On Self
Test (POST)

Compaq
Diagnostics

Diagnostic
Error Codes

Troubleshooting
Without
Diagnostics

This section covers troubleshooting
information for the Compaq Presario 1900
Series Portable Computers. The basic steps in
troubleshooting include:

1. Follow the

Preliminary Steps.

2. Run the Power-On

Self-Test (POST).

3. Follow the
recommended
actions described in
the diagnostic
tables, if you are
unable to run POST

Solving Minor
Problems

Contacting
Compaq
Support

or if POST displays
an error message.

When following the
recommended actions in
the Sections on POST
and

Diagnostic Error
Codes perform them in

the order listed. Rerun
POST after each
recommended action
until the problem is
solved and no error
message occurs. Once
the problem is solved, do
not complete the
remaining recommended
actions.

If the problem is
intermittent,
check the

NOTE:

computer several
times to verify
that the problem
is solved.

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Troubleshooting

Preliminary Steps

Before running POST, complete the following preliminary steps:

1. If a power-on password has been established, type the password and press the

Enter key. If the password is not known, clear the password.

2. Run Compaq diagnostics.

3. Turn off the computer and its external devices.

4. Disconnect any external devices that you do not want to test. Do not disconnect the

printer if you want to test it or use it to log error messages.

If the problem only occurs when an external device is
connected to the computer, the problem may be related to

IMPORTANT:

the external device or its cable. Verify this by running POST
with and without the external device connected.

5. Install loopback plugs in the serial and parallel connectors if you would like to test

these ports.

6. Ensure the hard drive is installed in the computer.

7. Ensure that the battery pack is inserted in the computer and the computer is

connected to an external AC power source.

When the preliminary steps are completed, you are ready to run

POST.

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Troubleshooting

Presario 1900 Series

Clearing the
Power-on
Password

Clearing the power-on
password requires
removing all Setup
attributes that are
programmed in the
CMOS.

If the password is not
known, clear it by
performing the
following steps:

Turn off the computer.

1.

2. Disconnect the power

cord.

3. Remove the battery

pack .

4. Remove the keyboard.

5. Disconnect the

backlight cable from
the connector on the
system board.

6. Using a conductive

piece of material (piece
of wire or tool)
simultaneously make
contact with the two
pads located at R37 on
the system board or
remove the RTC
battery located under
the battery charger

board for 5 seconds.

The password, together
with other Setup
attributes, will be
cleared.

7. Reassemble the

computer.

8. Turn on the computer

to verify that the power­on password has been
cleared. If it has not
been cleared, repeat
Steps 1 through 7.

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Troubleshooting

Running POST

To run POST, complete the following steps:

Turn off the computer, then turn on the computer.

If POST does not detect any errors, the computer will not beep. This indicates successful
completion of POST test. POST has run successfully and boots from the hard drive (or from a
bootable diskette if one is installed in the diskette drive).

If POST detects errors, the errors are indicated by screen and/or audible messages. Refer to
"Power-On Self-Test (POST) Codes" in the tables for a list of POST codes and their relevant
descriptions.

If the system is not functioning well enough to run POST, or if the display is not functioning

NOTE:

well enough to show POST error messages, refer to the Troubleshooting tables.

Power-On Self-Test Messages

102-System Board Failure

Probable Cause Recommended Action

DMA, timers, etc. Replace the system board.

162-System Options Not Set

Probable Cause Recommended Action

Configuration incorrect Run Computer Setup.
CMOS reflects that an invalid

Run Computer Setup.

configuration has been set.
RAM failure 1. Replace the memory modules.

2. Replace the system board.

Memory test data error 1. Replace the memory modules.

2. Replace the system board.

XX000YZZ RAM failure Replace the system board.

XX000YZZ 201-Memory Error

Probable Cause Recommended Action

301-Keyboard Error

Probable Cause Recommended Action
Keyboard failure 1. Ensure the keys are not depressed during POST.

2. Reconnect the keyboard with the computer off.

3. Replace the keyboard.

304-Keyboard or System Unit Error

Probable Cause Recommended Action
Keyboard or system board error 1. Replace the keyboard.

2. Replace the TouchPad or mouse.

3. Replace the system board.

601-Diskette Controller Error

Probable Cause Recommended Action
Mismatch in drive type or failure in the

1. Run Computer Checkup (TEST).

diskette controller

2. Check and/or replace cables.

3. Replace the system board.

605-Diskette Drive Error

Probable Cause Recommended Action
Mismatch in drive type Run Computer Setup.

1780-Primary Hard Drive 0 Failure

Probable Cause Recommended Action
Disk 0 failed to respond 1. Run Computer Checkup (TEST).

2. Replace the hard drive.

Hard drive format error 1. Run Computer Checkup (TEST).

2. Replace the hard drive.

1782-Hard Drive Controller

Probable Cause Recommended Action
Hard drive controller failure 1. Run Computer Setup.

2. Replace the hard drive.

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Troubleshooting

Diagnostic Error Codes

Diagnostic error codes occur if the system recognizes a problem while running
the Compaq Diagnostic program. These error codes help identify possibly
defective subassemblies.

The following tables list error codes, a description of the error condition, and the action required
to resolve the error condition.

IMPORTANT:

Retest the system after completing each step. If the problem is resolved, do not
proceed with the remaining steps.

For the removal and replacement of a particular subassembly, see the section
for Removal and Replacement Procedures.

Select error codes by number or type:

101 through 114 Processor Test
200 through 215 Memory Test
300 through 304 Keyboard Test
401 through 403 Parallel Printer Test
600 through 699 Diskette Drive or LS-120 Test
1101 Serial Test
1701 through 1736 Hard Drive Test
501 through 516 Video Test
2402 through 2456 Audio Test
2458 through 2480 Touch Pad Pointing Device Test
3206 CD/DVD Test
8601 through 8602
3301 through 6623

Processor Test Error Codes

Error
Code

101-xx
102-xx Coprocessor or Weitek Error 1. Run the Configuration and Diagnostics

CPU test failed Replace the processor and retest.

Description Recommended Action

Utilities.

2. Replace the processor board and retest.
103-xx DMA page registers test failed Replace the system board and retest.
104-xx Interrupt controller master test failed
105-xx Port 61 error
106-xx Keyboard controller self-test failed
107-xx CMOS RAM test failed
108-xx CMOS interrupt test failed
109-xx CMOS clock test failed
110-xx Programmable timer load data test

failed
113-xx Protected mode test failed
114-01 Speaker test failed 1. Check system configuration.

2. Verify cable connections to speaker.

3. Replace the system board and retest.

Memory Test Error Codes

200 -xx Memory machine ID test failed 1. Flash the system ROM and retest.
202-xx Memory system ROM checksum failed

2. Replace the system board and retest.

203-xx Write/Read test failed 1. Remove the memory module and retest.
204-xx Address test failed
211-xx Random pattern test failed
214-xx Noise test failed
215-xx Random address test failed

Keyboard Test Error Codes

300 -xx Failed ID Test 1. Check the keyboard connection. If

301-xx Failed Selftest/Interface Test

302-xx Failed Individual Key Test

304-xx Failed Keyboard Repeat Test

Parallel Printer Test Error Codes

401 -xx Printer failed or not connected 1. Connect the printer.
402-xx Failed Port Test

403-xx Printer pattern test failed

2. Install a new memory module and
retest.

disconnected, turn off the computer and
connect the keyboard.

2. Replace the keyboard and retest.

3. Replace the system board and retest.

2. Check power to the printer.

3. Install the loop-back connector and
retest.

4. Check port and IRQ configuration.

5. Replace the system board and retest.

600 -xx
601-xx

602-xx
603-xx
604-xx

605-xx
606-xx
609-xx
610-xx
697-xx
698-xx

699-xx

Diskette Drive Test

Diskette ID drive types test

failed

Diskette format failed

Diskette read test failed

Diskette write, read, compare test

failed

Diskette random read test failed

Diskette ID media failed

Diskette speed test failed

Diskette reset controller test failed

Diskette change line test failed

Diskette type error

Diskette drive speed not within limits

Diskette drive/media ID error 1. Replace media.

1. Replace the diskette media and retest.

2. Check and/or replace the diskette power
and signal cables and retest.

3. Replace the diskette drive and retest.

4. Replace the system board and retest.

2. Run the Configuration and Diagnostics
Utilities.

1101-xx

1701-xx
1702-xx

1703-xx
1704-xx

1705-xx
1706-xx
1707-xx
1708-xx
1709-xx
1710-xx

Serial Test Error Codes

Serial port test failed 1. Check port configuration

2. Replace the system board and retest.

Hard Drive Test Error Codes

Hard drive format test failed 1. Run the Configuration and Diagnostics

Hard drive read test failed

Hard drive write/read/compare test

failed

Hard drive random seek test failed

Hard drive controller test failed

Hard drive ready test failed

Hard drive recalibration test failed

Hard drive format bad track test failed

Hard drive reset controller test failed

Hard drive park head test failed

Utilities and verify drive type.

2. Verify that all secondary drives have
secondary drive capability.

3. Replace the hard drive and retest.

4. Replace the system board and retest.

1715-xx
1716-xx
1717-xx

1719-xx
1724-xx
1736-xx
* ECC = Error Correction Code

501-xx
502-xx
503-xx
504-xx

505-xx

Hard drive head select test failed

Hard drive conditional format test

failed

Hard drive ECC* test failed

Hard drive power mode test failed

Network preparation test failed

Drive monitoring test failed

Video controller test failed The following apply to error codes 501-xx

Video memory test failed

Video attribute test failed

Video character set test failed

Video 80 × 25 mode 9 × 14 character

cell test failed

Video Test Error Codes

through 516-xx:

1. Disconnect external monitor and test
with internal LCD display.

2. Replace the display assembly and retest.

3. Replace the system board and retest.

506-xx
507-xx
508-xx

509-xx
510-xx

511-xx
512-xx
514-xx
516-xx
2402 -xx
2403-xx
2404-xx

2405-xx

2406-xx

Video 80 × 25 mode 8 × 8 character

cell test failed

Video 40 × 25 mode test failed

Video 320 × 200 mode color set 0

test failed

Video 320 × 200 mode color set 1

test failed

Video 640 × 200 mode test failed

Video screen memory page test failed

Video gray scale test failed

Video white screen test failed

Video noise pattern test failed

Video memory test failed The following steps apply to error codes

Video attribute test failed

Video character set test failed

Video 80 × 25 mode 9 × 14 character

cell test failed

Video 80 × 25 mode 8 × 8 character

cell test failed

2402-xx through 2456-xx:

1. Run the Configuration and Diagnostics
Utilities.

2. Replace the display assembly and retest.

3. Replace the system board and retest.

2408-xx

2409-xx
2410-xx

2411-xx
2412-xx
2414-xx Video white screen test failed

2416-xx Video noise pattern test failed

2418-xx ECG/VGC memory test failed

2419-xx ECG/VGC ROM checksum test failed 1. Run the Configuration and Diagnostics

2421-xx ECG/VGC 640 × 200 graphics mode

2422-xx ECG/VGC 640 × 350 16 color set test

Video 320 × 200 mode color set 0

test failed

Video 320 × 200 mode color set 1

test failed

Video 640 × 200 mode test failed

Video screen memory page test failed

Video gray scale test failed

test failed

failed

Utilities.

2. Disconnect external monitor and test
with internal LCD display.

3. Replace the display assembly and retest.

4. Replace the system board and retest.

2423-xx ECG/VGC 640 × 350 64 color set test

failed
2424-xx ECG/VGC monochrome text mode test

failed
2425-xx ECG/VGC monochrome graphics mode

test failed
2431-xx 640 × 480 graphics test failure

2432-xx 320 × 200 graphics (256 color mode)

test failure
2448-xx Advanced VGA Controller test failed

2451-xx 132-column Advanced VGA test failed

2456-xx Advanced VGA 256 Color

test failed
2458 -xx Advanced VGA BitBLT test The following step applies to error codes

2458-xx through 2480-xx:

2468-xx Advanced VGA DAC test

Replace the system board and retest.

2477-xx Advanced VGA data path test

2478-xx Advanced VGA BitBLT test

2480-xx Advanced VGA LineDraw test

Audio Test Error Codes

3206 -xx Audio System Internal Error Replace the system board and retest.

TouchPad/Pointing Device Interface Test Error Codes

8601 -xx Mouse test failed 1. Replace the TouchPad and retest.

2. Replace the system board and retest.

8602-xx Interface test failed

CD/DVD Drive Test Error Codes

3301 -xx CD/DVD drive read test failed 1. Replace the CD/DVD and retest.

2. Verify that the speakers are connected.

3305-xx CD/DVD drive seek test failed

6600-xx ID test failed

6605-xx Read test failed

6608-xx Controller test failed

6623-xx Random read test failed

3. Verify that drivers are loaded and
properly installed.

4. Replace the CD/DVD drive and retest.

5. Replace the system board and retest.

Back to top

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Troubleshooting

Compaq Diagnostics

Compaq Diagnostics is installed on the hard drive of the computer. Run the
Diagnostics utilities when you want to view or test system information and if
you have installed or connected devices. If you run Compaq Diagnostics from
a diskette, ensure that it is version 10.11 or later.

The Diagnostics menu includes the following utilities:

■ Computer Checkup (TEST)

■ View System Information (INSPECT)

■ Prepare Computer for a Compaq Service Call (RemotePaq)

If you have a difficult problem that seems unsolvable, run the Diagnostics
utilities before calling for support. Run Computer Checkup and select to save
the device list to a file to print or to save the log of errors. Run the View
System Information (INSPECT) utility and select to print or save that
information. Have the files or the printed information available when you call
for support.

Computer Checkup (TEST)

Computer Checkup (TEST) determines whether the various computer
components and devices are recognized by the system and are functioning
properly. You can display, print, or save the information generated by
Computer Checkup.

Follow these steps to run Computer Checkup:

1. Plug the computer into an external power source. (A low battery
condition could interrupt the program.)

2. Turn on the external devices that you want to test. Connect the printer if
you want to print a log of error messages.

3. Insert the Compaq Diagnostics diskette in drive A.

4. Turn on or restart the computer. The computer starts from drive A, and
the Diagnostics Welcome screen appears.

5. Press Enter to continue. The Diagnostics menu appears.

6. Select Computer Checkup from the Diagnostics menu. A Test Option
menu appears.

7. Select View the Device List from the Test Option menu. A list of the
installed Compaq devices appears.

8. If the list of installed devices is correct, select OK . The Test Option
menu appears.

If the list is incorrect, ensure that any new devices are installed

NOTE:

properly.

9. Select one of the following from the Test Option menu:

■ Quick Check Diagnostics. Runs a quick, general test on

each device with a minimal number of prompts. If errors
occur, they are displayed when the testing is complete. You
cannot print or save the error messages.

■ Automatic Diagnostics. Runs unattended, maximum testing

of each device with minimal prompts. You can choose the
amount of times to run the tests, stop on errors, or print/save
a log of errors.

■ Prompted Diagnostics. Allows maximum control over

testing the devices. You can choose attended or unattended
testing, decide to stop on errors, or choose to print/save a log
of errors.

10. Follow the instructions on the screen as the devices are tested. When
testing is complete, the Test Option menu appears.

11. Exit the Test Option menu.

12. Exit the Diagnostics menu.

View System Information (INSPECT)

The View System Information (INSPECT) utility provides information about
the computer and installed or connected devices. You can display, print, or
save the information.

Follow these steps to run View System Information (INSPECT) from the
Compaq Diagnostics diskette:

1. Turn on the external devices that you want to test. Connect the printer if
you want to print the information.

2. Insert the Compaq Diagnostics diskette in drive A.

3. Turn on or restart the computer. The computer starts from drive A, and
the Diagnostics Welcome screen appears.

4. Press Enter to continue. The Diagnostics menu appears.

5. Select View System Information (INSPECT) from the Diagnostics
menu.

6. Select the item you want to view from the following list:

System Memory
ROM Audio
Keyboard Operating system
System ports System files
System storage Windows files
Graphics

7. Follow the instructions on the screen to cycle through the screens, to
return to the list and choose another item, or to print the information.

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Troubleshooting

Contacting Compaq Support

Obtain the following information before contacting Compaq Reseller Support:

● Product name

● Product serial number

● Purchase date

● Conditions under which the problem occurred

● Any error messages that have occurred

● Hardware configuration

● Type of printer connected

● Hardware/software being used

● Printed result of Computer Checkup (TEST)

● Printed copies of CONFIG.SYS and AUTOEXEC.BAT files, if possible

Shipping Preparation

To ship the computer, complete the following steps:

1. Back up the critical hard drive files. Ensure that backup tapes/diskette
are not exposed to electrical or magnetic fields while stored in transit.

2. Turn off the computer and external devices.

3. Disconnect the external devices from their power sources, then from the
computer.

Ensure that there is no diskette in the diskette drive and that

IMPORTANT:

there are no PC Cards in the PC slots.

4. Close the display and all exterior doors of the computer.

5. Pack the computer with sufficient packing material to protect it. Use the
original packing box or similar packaging.

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Troubleshooting

Troubleshooting Without Diagnostics

This section provides information about how to identify and correct some common hardware, memory, and software
problems. It also explains several types of common messages that may be displayed on the screen. The following pages
contain troubleshooting information on:

Audio Memory
Battery/Battery gauge PC Card
CD/DVD drive Power
Diskette/Diskette drive Printer
Display Touch Pad
Hard drive Keyboard/Numeric keypad
Hardware Installation

Since symptoms can appear to be similar, carefully match the symptoms of the computer malfunction against the problem
description in the Troubleshooting tables to avoid a misdiagnosis.

WARNING: To avoid a potential shock hazard during troubleshooting procedures, disconnect all power
sources before removing the keyboard cover or the display bezel.

Before Replacing Parts

Verify that cables are connected properly to the suspected defective parts.

■ Run Computer Setup after connecting external devices.

■ Verify that all required device drivers are installed.

■ Verify that all required changes have been made to the CONFIG.SYS file.

■ Verify that all required changes have been made to the AUTOEXEC.BAT file.

■ Verify that all printer drivers have been installed for each application.

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Troubleshooting

Solving Minor Problems

Some minor problems and possible solutions are outlined in the following tables. If the problem
appears related to a software application, check the documentation provided with the software.

Solving Audio Problems

Some common audio problems and solutions are listed in the following table.

Solving Audio Problems

Problem Probable Cause Solution(s)

Computer does not beep after the Power-On
Self-Test (POST).

This is typical; it indicates successful
completion of the Power-On Self-Test
(POST).

No action is required.

Solving Battery Pack and Battery Gauge Problems

Some common causes and solutions for battery pack problems are listed in the following table. The
"Solving Power Problems" section in this chapter may also be applicable.

Solving Battery Pack and Battery Gauge Problems

Problem Probable Cause Solution(s)

Computer won't turn on when battery
pack is inserted and power cord is
unplugged.

Computer is beeping and battery LED
icon is blinking.

Battery pack is discharged. Connect the computer to an external

power source and charge the battery
pack.

Replace the battery pack with a fully
charged battery pack.

Battery charge is low. Immediately save any open file(s). Then

Check the battery connectors on the
system board to verify they are evenly
spaced and that they are not bent or
broken.

do any one of the following:

● Connect the computer to an

external power source to charge
the battery pack.

● Turn off the computer or initiate

Hibernation until you can find
another power source or charge
the battery pack.

Computer battery LED icon (front on
the unit) blinks to indicate low battery
condition, but computer does not beep.

Battery LED icon doesn't light and
battery pack won't fast charge.

You have to set the date and time every
time you turn on the computer.

Battery charge does not last as long as
expected.

Volume is turned down too low. Adjust the volume.

Battery pack is already charged. No action is necessary.
Battery pack was exposed to

temperature extremes.
Battery pack is at end of its life. Replace battery pack.
RTC battery is dead. Replace the RTC battery.

Battery is being exposed to high
temperatures or extremely cold
temperatures.

Battery has partially self-discharged. Recharge the battery. Discharge the

Allow time for the battery pack to return
to room temperature.

Keep the battery pack within the
recommended operating temperature
range 50° F to 104° F (10° C to 40° C)
or recommended storage range

-4° F to 86° F (-20° C to 30° C ).
Recharge the battery pack.

battery completely and then recharge it.

Battery pack is warm to the touch after
charging.

Battery pack operating time is far less
than the documented average
operating time.

Power management is disabled. Set a power management level in

Computer Setup.

An external device or PC Card is
draining the battery.

Normal warming has occurred due to
charging.

Power management is turned off or
disabled.

An external device or PC Card is
draining the battery.

Battery pack has partially self­discharged.

Turn off or disconnect external devices
when not using them.

No action is required.

Enable power management in Computer
Setup and in Windows Power Properties.

Turn off or disconnect external devices
when not using them.

Condition the battery pack by fully
charging, fully discharging, then fully
recharging it.

To maintain the charge, leave battery
packs in the computer when it is
connected to external power.

If the computer is disconnected from
external power for more than two
weeks, remove battery packs from the
computer to reduce the discharge rate.

Battery pack is being exposed to high
temperatures or extremely cold
temperatures.

Keep the battery pack within the
recommended temperature ranges.
Operating: 50° F to 104° F
(10° C to 40° C)
Storage: -4° F to 86° F
(-20° C to 30° C )

Recharge the battery pack.

Solving CD/DVD Drive Problems

Some common causes and solutions for CD/DVD drive problems are listed in the following table.

Solving CD/DVD Drive Problems

Problem Probable Cause Solution(s)

CD/DVD drive cannot read a compact
disc or digital versatile disc.

Compact disc or digital versatile disc
is upside down or is improperly
inserted in the CD/DVD drive.

CD is CD Plus or Pregap/Track 0 type. Cannot read these type CDs in 24x.

Open the CD/DVD loading tray, lay the
compact disc or digital versatile disc in it
(label side up), then close the tray.

Remove the CD.

Solving Diskette and Diskette Drive Problems

Some common causes and solutions for diskette and diskette drive problems are listed in the
following table.

Solving Diskette and Diskette Drive Problems

Problem Probable Cause Solution(s)

Diskette drive cannot write to a
diskette.

Diskette is write-protected. Disable the diskette's write-

protect feature or use a
diskette that is not write­protected.

Computer is writing to
the wrong drive.

Not enough space is left

Check the drive letter in the
path statement.

Use another diskette.

on the diskette.
Drive error has occurred. Run Computer Checkup from

the Compaq Diagnostics
diskette.

Diskette is not formatted. Format the diskette. At

the system prompt, enter

Diskette drive cannot read a
diskette.

The wrong type of diskette is
being used.

Diskette has a bad sector. Copy files to hard drive or

Drive error has occurred. Run Computer Checkup from

Diskette is not
formatted.

Cannot boot from diskette. Bootable diskette is not in

drive A.

FORMAT A:
Use the type of diskette

required by the drive.

another diskette. Reformat bad
floppy.

the Compaq Diagnostics
diskette.

Format the diskette. At the
system prompt, enter

FORMAT A:
Put the bootable diskette in

drive A.

Diskette Boot has incorrect
setting in Computer Setup.

Run Computer Setup and set
diskette as first to boot.

Solving Display Problems

This section lists some common causes and solutions for computer display and external monitor
problems.

You can perform a monitor self-test on an external VGA color or monochrome monitor by
disconnecting the monitor from the computer. To do so, complete the following steps:

1. Turn off the monitor.

2. Turn off the computer.

3. Disconnect the monitor signal cable from the computer.

4. Turn on the monitor and allow it to warm up for one minute.

The display should be white. A narrow black border may also appear on the left and right sides of
the display. Either of these displays indicates that the monitor is working properly.

Solving Display Problems

Problem Probable Cause Solution(s)

Screen is dim. Control for brightness (if

applicable) is not set properly.

Adjust the Brightness of the
display by using Fn + F7 (¯ )
or
Fn + F8 (- ).

Computer screen is in direct

Tilt display or move computer.

light.

Screen is blank. Screen save was initiated by

Power Management due to
lack of user activity.

Display has overheated. If computer is in direct sunlight,

Display is blank and the Suspend

System is in Suspend mode. Press any key or touch the

icon is flashing.
Internal display is blank and the

screen on an external monitor

Display function was switched
to the external monitor.

displays information.

Internal display flashes or has
garbled characters when
computer is connected to
external monitor.

Using 1024 × 768 or higher
resolution on external monitor
and have toggled back to
internal display, which
supports up to

Press any key or touch the
Touch Pad.

move it and allow it to cool off.

Touch Pad.
Use Fn + F2 to switch between

LCD or CRT.

Restart the computer.

The light tubes on the edge of the
display panel do not light up at all and
Power-On Self-Test (POST) completes
when the unit is powered up.**

The light tubes on the edge of the
display panel do not light up at all and
Power-On Self-Test (POST) does not
complete when the unit is powered
up.**

Backlight (brightness) cannot be
adjusted with Fn + F7 (¯ ) or
Fn + F8 (- ).***

800 × 600.

Improper backlight or display cable
connections

Defective inverter board. Replace the display assembly.
Defective display cable. Replace the display assembly.
Defective display panel. Replace the display assembly.
Defective system board. Replace the system board.
Defective system board. Replace the system board.

Improper display cable connections. 1. Reseat the display cable to the

Replace the display assembly.

system board.

2. Replace the display assembly.

Defective inverter board. Replace the display assembly.
Defective display cable. Replace the display assembly.
Defective system board. Replace the system board.
Defective inverter board. Replace the display assembly.
Defective display cable. Replace the display assembly.
Defective system board. Replace the system board.

** This problem indicates that the backlight or its power circuitry has failed. Since you cannot observe the POST result on
the display panel when the backlight is not functioning, connect the unit to an external monitor before powering the unit
up. If an external monitor is not available, verify that POST completes by opening and closing the display, listening for the
single or double beep, and watching for the LEDs turn on at the front of the computer.

This display panel has a continuous pattern
across it (e.g., a "jailbars" pattern), has a
single color on it, or has garbled graphics
across the entire panel. This failure is for
patterns across the entire panel (not just on
one section).

Improper display cable
connections

Reseat the display cable to the following
until the problem is solved:

1. System board

2. Display assembly

Defective display cable. Replace the display assembly.

Defective inverter board. Replace the display assembly.

Defective system board. Replace the system board.

To perform a "self-test" on an external VGA color monitor, complete the following steps: The screen should be

NOTE:

white. A narrow black border may also appear on the left and right sides of the display. Either of these displays
indicates that the monitor is working properly.

Solving Hard Drive Problems

Some common causes and solutions for hard drive problems are listed in the following table.

CAUTION: To prevent loss of information, always maintain an up-to-date backup of your hard drive at all

times, in case of errors or failures.

Solving Hard Drive Problems

Problem Probable Cause Solution(s)

Reading hard drive takes an unusually
long time after restarting the computer.

Hard drive error occurs. Hard drive has bad sectors or has

Hard drive does not work. Hard drive is not seated properly. Turn off and unplug the computer,

System entered Hibernation due to
low battery condition and is now
exiting from it.

failed.

Give the system time to restore the
previously saved data to its exact state
before Hibernation.

Run Computer Checkup.

remove the battery pack, and remove
and then reinstall the hard drive.

Solving Hardware Installation Problems

Some common causes and solutions for hardware installation problems are listed in the following
table.

Solving Hardware Installation Problems

Problem Probable Cause Solutions(s)

A new device is not recognized as
part of the computer system.

Cable(s) of new external
device are loose or
power cables are unplugged.

Power switch of new external
device is not turned on.

Ensure that all cables are
properly and securely
connected.

Turn off the computer, turn on
the external device, then turn
on the computer to integrate
the device with the computer
system.

Device is not seated properly. Turn off the computer and

reinsert the device.

Solving Keyboard/Numeric Keypad Problems

Some common causes and solutions for keyboard/numeric keypad problems are listed in the
following table.

Solving Keyboard/Numeric Keypad Problems

Problem Probable Cause Solution(s)

Embedded numeric keypad on
computer keyboard is disabled.

Embedded numeric keypad is
disabled and Num Lock function is

Num Lock function is not
enabled.

External numeric keypad is
connected to the computer.

Press the Shift + NumLk
keys to enable the Num Lock
function and embedded
numeric keypad. The Num
Lock icon on the status panel
turns on.

Disconnect the external
numeric keypad from the

on.

computer.

Solving Memory Problems

Some common causes and solutions for memory problems are listed in the following table.

Solving Memory Problems

Problem Probable Cause Solution(s)

Memory count during Power-On Self­Test (POST) is incorrect.

Optional memory expansion
card is installed incorrectly,
is incompatible with
the computer, or is defective.

Ensure that the optional
memory expansion card is
installed correctly.

"Out of Memory" message is
displayed on the screen or
insufficient memory error occurs
during operation.

Solving Minor Problems (continued)

System ran out of
memory for the application.

Too many TSR (terminate­and stay-resident)
applications are running.

Check the application
documentation for memory
requirements.

Install additional memory.

Remove from memory any
TSR applications that you do
not need.

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Troubleshooting

Solving PC Card Problems

Some common causes and solutions for PC Card problems are listed in the following table.

Solving PC Card Problems

Problem Probable Cause Solution(s)

When turned on, the computer
does not beep when a PC Card
is inserted.

Card is not inserted properly.

PC Card beeps are disabled.

Ensure the card is inserted
in the correct orientation.

Double-click the PC Card
icon in the Control Panel,
click the Global Settings
tab, the enable PC Card
sound effects.

Speaker is turned off or
volume is turned down.

Press volume buttons to
turn the speaker on, then
increase the volume.

PC Card drivers are not
installed.

Double click the Add New
Hardware icon in the

PC Card modem, fax, or
network card does not work.

Card or card driver is not
supported.

Card is not fully inserted into
the slot or is not inserted
properly.

Telephone cord is not

Control Panel for installation
instructions.

If PC Card or drivers are not
compatible with Windows,
install drivers and use the
PC Card in MS-DOS mode.

Contact your Compaq
authorized service provider
for a list of PC Cards tested
successfully in Compaq PC
Card platforms.

Ensure the card is inserted
in the correct orientation.

Check and secure telephone

PC Card modem or fax card
does not work.

Modem network PC Card
does not work.

plugged in all the way.
Necessary drivers are not

connection.
Install drivers.

installed (turned on).
You are trying to access the

card using the wrong COM

See
COM port.

Specifications to verify

port.
The card conflicts with a

serial device.

See Specifications to verify
address.

The card is not supported. Use supported cards only.

Network driver is not installed or is

Install driver.

not set up properly.
Telephone cord is not properly

connected.

Verify telephone
connection.

Memory or storage card
does not work.

SRAM and flash memory cards
require the memory card driver to be
loaded (turned on).

Flash memory cards require the
Microsoft FlashFile System to
be loaded.

Hard drives on flash mass storage
cards require the PC Card ATA driver
to be loaded.

You are trying to access the hard
drive card using the wrong drive
letter.

Install driver.

Double-click My
Computer to verify
the drive letter
assigned to the card.

The card is not supported. Contact your Compaq

Solving Power Problems

Also see "Solving Battery and Battery Gauge Problems" in this section.

Solving Power Problems

authorized service
provider for a list of
PC Cards tested
successfully in
Compaq PC Card
platforms.

Problem Probable Cause Solution(s)

Computer won't turn on and
battery pack is not inserted.

Computer is not connected to
a power source.

Power cords to the external
power source are unplugged.

Insert battery or connect
an external power source.

Ensure that power cords
connecting the computer
and the external power
source are plugged in
properly.

Power adapter is defective. Replace AC Adapter and

restart.

Computer turned off while it was
left unattended and the power icon
is off.

System board is defective. Replace the system board.
System initiated Hibernation

due to a critical low-battery
condition.

Replace the battery pack
with a fully charged
battery pack or connect
the computer to an
external power source.
Then turn on the
computer.

System initiated Hibernation

Turn on the computer.

after a preset timeout.

Solving Printer Problems

If you experience problems printing, run a printer self-test. Refer to the documentation provided with your printer for
instructions. If the self-test fails, it is a printer-specific problem. Also refer to the printing section of your application
documentation.

Solving Printer Problems

Problem Probable Cause Solution(s)
Printer will not turn on. The signal cable may not be

connected properly, or the
printer is unplugged.

Ensure that the signal
cable is properly
connected and that the
power cord is connected to
the electrical outlet.

Printer will not print. Printer is not turned on or is

off line.
The device drivers for your

application are not installed.

Turn the printer on and set
it to on line.

Refer to the printer
documentation to install
the correct printer driver.

Printer that is set up for a
network is not connected to

Connect the printer to the
network.

the network.

Printer cable is too long,
unshielded, or defective.

Paper tray is empty. Fill the paper tray with

Printer prints garbled information. Correct printer drivers

are not installed.

Cable is not
connected properly.

Replace the cable.

paper and set the printer
to online.

Refer to the printer
documentation to install
the correct printer driver.

Ensure that the printer
signal cable is properly
connected to the
computer.

Cable is defective. Replace the printer cable

and retest.

Solving Touch Pad/Pointing Device Problems

Some common causes and solutions for Touch Pad/pointing device problems are listed in the
following table.

Solving Touch Pad/Pointing Device Problems

Problem Cause Solution(s)
Touch Pad or mouse does not work. Incorrect or no device driver

Install the device driver

is installed.

The device driver is not
installed in Windows.

External mouse does not work. Mouse is not securely

connected or is connected to
an incorrect external
connector.

Touch Pad or mouse does not work

Mouse is not enabled. Enter MOUSE at the
even though the device is enabled
in Windows.

Add a line in the

and add to the
AUTOEXEC.BAT file or
CONFIG.SYS file.

Install the Touch
Pad/mouse driver in
Windows.

Ensure that the mouse is
securely connected to the
appropriate external
connector.

system prompt to activate
the mouse device driver.

AUTOEXEC.BAT file to

Cursor skips or moves abnormally
when using the Touch Pad.

automatically activate the
mouse device driver each
time computer is turned
on or restarted.

Cable not properly seated in

Reseat cable.

Touch Pad board.

Defective Touch Pad board. Replace Touch Pad board.

Defective system board. Replace system board.

Device driver is not correctly

installed in Windows.

The Touch Pad needs to be

cleaned.

Install the appropriate
device driver in Windows.

Clean the Touch Pad with
a cloth dampened with
alcohol or an ammonia­based glass cleaner. Wipe
up liquid with a dry cloth.

Compaq logo: Link to

STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US |

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Specifications Parts Catalog

Battery Pack Operating Time

This section covers the following information concerning battery pack operating time:

● Increasing battery pack operating time

● Conditioning a battery pack

● Disposing of a used battery pack

Increasing Battery Pack Operating Time

Battery pack operating time differs depending on several variables. To avoid unnecessary
replacement, consider the following variables when determining how long a charged battery pack
should last:

● Power management settings

● Hardware configuration

● Software applications

● Installed options

● Display brightness

● Hard drive usage

● Changes in operating temperature

● Type and number of installed PC Cards

The power consumption requirements for PC Cards vary widely. Some cards drain

NOTE:

the battery pack very rapidly.

Battery pack operating time can be increased by as much as 50 percent by controlling the energy
required by the computer and the energy stored in the battery pack.

Minimizing the Energy Required

To minimize the energy required by the computer, follow these steps:

● Set the power conservation levels in the Power Management utility to Maximum .

● Customize the timeout value to work more efficiently with the applications. The

amount of battery life depends on the values selected.

Maximizing the Energy Stored

To maximize the energy stored in the battery pack, follow these guidelines:

● Condition the battery pack at least every 30 days to improve overall battery

performance.

● Keep a battery pack in the computer when using it with AC power to supply the

battery pack with a constant trickle charge.

● Store the battery pack in a cool, dry place when not in use.

Conditioning a Battery Pack

CAUTION: To avoid a loss of data, ensure that all data is saved before discharging a
battery pack.

To condition a battery pack, complete the following steps:

1. Plug in the AC adapter and allow the battery to charge until the fast charge arrow
on the display disappears. Your battery gauge may read 100 percent for a period of
time before the arrow disappears. Do not unplug the AC adapter until the arrow
disappears.

2. Unplug the AC adapter and allow the battery to drain until the computer reaches
hibernation and turns itself off.

CAUTION: Do not plug the AC adapter during this process or you will need to restart
with step number 1. You may use the computer while the battery is draining.

3. Your battery is re-conditioned.

4. Plug in the AC adapter and begin using the computer.

The table below shows battery pack charge times by model.

Battery Charge Time

Computer On Line Off Line

Li ion Battery Pack 4.5 hours premature termination 2:50 hr

Disposing of a Used Battery Pack

In the interest of safeguarding our environment. Compaq Computer Corporation recommends that
nickel metal hydride (NiMH) and lithium ion (Li ion) battery packs be recycled. Battery packs
should be handled in accordance with country, state, province, or local regulations.

CAUTION: Never attempt to open or service a battery pack. Opening a battery pack not
only damages the pack and makes it unusable, but also expose potentially harmful
battery components.

Back to Top of Page

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Models and
Features

Controls and
Lights

Status Panel
Left Side

Components
Right Side

Components
Bottom of

Unit
Left Side

and Top
Wedge
Components

Right Side
Wedge
Components

Rear
Connectors

Presario 1900 Series

Compaq Presario 1900 Series Portable Computers,
a new generation of multimedia portable

Port
Replicator
Connectors

Port
Replicator
Components

Power
Management

computers, present ultimate thin and light-weight
designs, outstanding audio and video, advanced
core features, and attractive styles.

The Removable Drive Wedge provides multimedia
expansion capability with a DVD or CD-ROM Drive.

Compaq Presario 1900 Series Portable Computers
include an optional integrated 10/100Base T
Ethernet Port Replicator, allowing the user to attach
or detach the computer quickly and easily from
peripheral devices. Containing a full array of ports,
some Presario computers are accessible while the
system is docked to the Port Replicator.

This fully functional Intel Celeron- and Pentium II­based portable computer provides full desktop
versatility.

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Pin Assignments

This appendix provides connector pin assignment tables for Compaq Presario 1900
Series Portable Computers. For more information on connectors, refer to the section
on Back Connectors.

NOTE: The signals in all tables of this appendix are considered active high unless
otherwise indicated by an asterisk (*).

Parallel Connector

Pin Signal Pin Signal

1 Strobe* 10 Acknowledge*
2 Data Bit 0 11 Busy
3 Data Bit 1 12 Paper Out
4 Data Bit 2 13 Select
5 Data Bit 3 14 Auto Linefeed*
6 Data Bit 4 15 Error*
7 Data Bit 5 16 Initialize Printer*
8 Data Bit 6 17 Select In*
9 Data Bit 7 18-25 Signal Ground
* = Active low

Serial Connector

Connector Pin Signal

1

2

3

Carrier Detect

Receive Data

Transmit Data

4

5

6

7

8

9

Data Terminal Ready

Signal Ground

Data Set Ready

Ready to Send

Clear to Send

Ring Indicator

Keyboard/Mouse Connector

Connector Pin Signal

1

Data

2

3

4

5

6

Not defined

Ground

+5 VDC

Clock

Not defined

External VGA Monitor Connector

Connector Pin Signal

1

Red Analog

2

3

4

5

6

7

8

9

Green Analog

Blue Analog

Not connected

Ground

Ground Analog

Ground Analog

Ground Analog

Not connected

10

11

12

13

14

15

Ground

Monitor Detect

DDC2B Data

Horizontal Sync

Vertical Sync

DDC2B Clock

Universal Serial Bus Connector

Connector Pin Signal

1
Ground

2 D+

3 D-

4 Power

Modem Connector

Connector Pin Signal

1

Unused

2

3

4

Unused

Tip

Ring

5

6

Unused

Unused

This information was not available at time of publication.

Port Replicator Connector

Pin Signal Pin Signal Pin Signal Pin Signal

This information was not available at time of publication.

LAN Connector