Compaq presario 1800t, 1825 schematic
Maintenance & Service Guide
Presario 1800 Series
Models: 1825 and 1800T
| Home Page | Notice | Preface | Product Description | Troubleshooting
Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications
Pin Assignments | Battery Pack Operations
Models and
Features
Controls and
Lights
Internet
Zone
Buttons and
Lights
Front Bezel
Components
Left Side
Components
Right Side
Components
Bottom of
Unit
Back
Connectors
Port
Replicator
Components
Port
Replicator
Connectors
Welcome to the Presario 1800 Series Maintenance and Service Guide. This
online guide is designed to serve the needs of those whose job it is to repair
Compaq products. The
Preface shows symbol conventions, Technician Notes and Serial Number
The
locations on the unit.
Notice contains the copyright and trademark information.
Power
Management
for Windows
98
This MSG will be periodically maintained and updated online as needed. For
content comments or questions, contact Tech Support..
To report a technical problem, contact your Regional Support Center or IM Help
Center.
Maintenance & Service Guide
Presario 1800 Series
Models: 1825 and 1800T
| Home Page | Notice | Preface | Product Description |
Troubleshooting
Illustrated Parts Catalog | Removal & Replacement Procedures |
Specifications
Pin Assignments | Battery Pack Operations
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.
1999 Compaq Computer Corporation.
All rights reserved. Printed in the U.S.A.
Compaq, Presario 1800 Series 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 1800 Series Portable Computer
First Edition (August 1999)
Compaq Computer Corporation
Maintenance & Service Guide
Presario 1800 Series
Models: 1825 and 1800T
| Home Page | Notice | Preface | Product Description | Troubleshooting
Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications
Pin Assignments | Battery Pack Operations
Preface
This Maintenance and Service Guide is a troubleshooting guide that can be used for reference when
servicing the Compaq Presario 1800 Series Portable Computers.
Compaq Computer Corporation reserves the right to make changes to the Compaq Presario 1800
Series Portable Computers without notice.
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 1800 Series Portable Computer documentation set
● Introducing Windows 98 Guide
● Service Training Guides
● Compaq Service Advisories and Bulletins
● Compaq QuickFind
● Compaq Service Quick Reference Guide
Top of Page
Maintenance & Service Guide
Presario 1800 Series
Models: 1825 and 1800T
| Home Page | Notice | Preface | Product Description | Troubleshooting
Illustrated Parts Catalog | Removal & Replacement Procedures |
Specifications
Pin Assignments | Battery Pack Operations
Product Description
Models and
Features
Controls and
Lights
Internet
Zone
Buttons and
Lights
Front Bezel
Components
Left Side
Components
Right Side
Components
Bottom of
Unit
Back
Connectors
Port
Replicator
Components
Port
Replicator
Connectors
Power
Management
for Windows
98
Compaq
Presario
1800 Series
Portable
Computers
are a new
generation
of
multimedia
portable
computers
with a thin
and lightweight
design,
outstanding
audio and
video,
advanced
core
features,
and
attractive
styling.
The 1800T
Series
allows
configure-toorder (CTO)
accessibility,
providing a
range of
outstanding
and
innovative
features and
components.
Maintenance & Service Guide
Presario 1800 Series
Models: 1825 and 1800T
| Home Page | Notice | Preface | Product Description | Troubleshooting
Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications
Pin Assignments | Battery Pack Operations
Troubleshooting
Preliminary
Steps
Clearing the
Power-On
Password
This section covers troubleshooting information for the Compaq Presario 1800 Series
Portable Computers. The basic steps in troubleshooting include:
1. Follow the
Preliminary Steps.
Power-On Self
Test (POST)
Compaq
Diagnostics
Diagnostic Error
Codes
Troubleshooting
Without
Diagnostics
Solving Minor
Problems
Contacting
Compaq
Support
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 or if POST displays an error message.
When following the recommended actions in the Sections on
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.
NOTE:
If the problem is intermittent, check the computer several times to
verify that the problem is solved.
POST and
Maintenance & Service Guide
Presario 1800 Series
Models: 1825 and 1800T
| Home Page | Notice | Preface | Product Description |
Troubleshooting
Illustrated Parts Catalog | Removal & Replacement Procedures |
Specifications
Pin Assignments | Battery Pack Operations
Illustrated Parts Catalog
System Unit
Boards
Display
Assembly
Mass Storage
Devices
Miscellaneous
Cable Kit
Miscellaneous
Hardware Kit
Miscellaneous
Plastics Kit
Miscellaneous
Parts
Documentation
and Software
This section provides a breakdown of spare parts and
identifies the spare part ordering number associated with
each item for Compaq Presario 1800 Series Portable
Computers.
Maintenance & Service Guide
Presario 1800 Series
Models: 1825 and 1800T
| Home Page | Notice | Preface | Product Description | Troubleshooting
Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications
Pin Assignments | Battery Pack Operations
Removal and Replacement Procedures
This section explains the removal and replacement procedures for the computer.
Serial Number Location
Removal
Sequence
Electrostatic
Discharge
Service
Considerations
Cables and
Connectors
Preparing the
Computer for
Disassembly
Battery Pack
Palmrest
Cover with
TouchPad
Keyboard
Status Panel
Internet
Button Board
Heatspreader
Network
Interface Card
Modem
Hard Drive
DisqPlay
Module
Report the computer serial number
ordering spare parts. The serial number is located on the underside of the
computer.
to Compaq when requesting information or
Processor
DVD or
CD Drive
Display Panel
Assembly
Upper CPU
Cover
Fan Assembly
Diskette Drive
Battery
Charger Board
Speaker
Assembly
System Board
Memory
Module
Maintenance & Service Guide
Presario 1800 Series
Models: 1825 and 1800T
| Home Page | Notice | Preface | Product Description | Troubleshooting
Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications
Pin Assignments | Battery Pack Operations
Specifications
This section covers the following specifications of Compaq Presario 1800 Series Portable
Computers:
● Physical and Environmental
● System Interrupts
● System DMA
● System I/O Address
● System Memory Catalog
● Display
● Memory Expansion
● Diskette or LS120 Drive
● Hard Drive
● DVD or CD drive
● Battery Pack
Physical and Environmental
Dimensions
Height
Depth
Width
Computer Specifications
U.S. Metric
1.65 in
13.00 in
10.99 in
4.20 cm
33.00 cm
27.90 cm
Weight
Stand-Alone (Battery Pack) Power
Requirements
Nominal Operating
Maximum Average
Peak Operating
AC Power Requirements
Operating Voltage
Operating Current
Operating Frequency
Maximum Transient
7.9 lbs 3.58 kg
Li-ion 3.2 mAh
W @ 14.8 V
W @ 14.8 V
W @ 14.8 V
100-240 V
0.8/0.4 A RMS
47-63 Hz
Meets IEC 801-4 and IEC801-5
1kV for 50 ns
Temperature
Operating
Nonoperating
Relative Humidity (noncondensing)
Operating
Nonoperating (tw = 38.7°C max)
Altitude
Operating
Nonoperating
Shock
50° to 95 °F
-4° to 140 °F
90%
5% to 95%
0 to 10,000 ft
0 to 30,000 ft
10° to 35 °C
-20° to 60 °C
10% to 90%
5% to 95%
0 to 3.05 km
0 to 9.14 km
Operating
Non operating
Vibration
Operating
Nonoperating
NOTE: Applicable product safety standards specify thermal limits for plastic surfaces. Compaq Explorer
Series Portable Computers operate well within this range of temperatures.
Top of Page
System Interrupts
10 G, 11 ms, half sine
240 G, 2 ms, half sine
0.5 G
1.5 G
System Interrupts
Hardware IRQ System Function
IRQ0 System timer
IRQ1 Standard 101/102-key or Microsoft Natural Keyboard
IRQ2 Programmable interrupt controller
IRQ3 Lucent 56K V.90 PCI DF Modem
IRQ4 Communications Port (COM1)
IRQ5 ESS SOLO-1 PCI AudioDrive
IRQ5 RAGE LT PRO AGP 2X (English)
IRQ6 Standard Floppy Disk Controller
IRQ7 Printer Port (LPT1)
IRQ8 System CMOS/real time clock
IRQ9 Available
IRQ10 Available
IRQ11 Intel 21143/2 based 10/100 mbps Ethernet Controller
IRQ11 Texas Instruments PCI-1211 CardBus Controller
IRQ11 Intel 82371AB/EB PCI to USB Universal Host Controller
IRQ12 Synaptics PS/2 TouchPad
IRQ13 Numeric Data Processor
IRQ14 Intel 82371AB/EB PCI Bus Master Primary IDE Controller
IRQ15 Intel 82371AB/EB PCI Bus Master Secondary IDE Controller
Top of Page
System DMA
Hardware DMA System Function
DMA 1 ESS SOLO-1 DOS Emulation
DMA 2 Standard Floppy Disk Controller
System DMA
DMA 3 ECP Printer Port (LPT1)
DMA 4 Direct memory access controller
Top of Page
System I/O Address
System I/O Address
I/O Address (Hex) System Function (Shipping Configuration)
0000h-000Fh Direct memory access controller
0020h-0021h Programmable interrupt Controller`
0040h-0043h System timer
0060h-0060h
Standard 101/102-Key or Microsoft Natural
Keyboard
0061h-0061h System speaker
Standard 101/102-Key or Microsoft Natural
0064h-0064h
Keyboard
0070h-0071h System CMOS/real time clock
0072h-0073h Motherboard resources
0080h-0080h Motherboard resources
0081h-008Fh Direct memory controller
00A0h-00A1h Programmable interrupt controller
00C0h-00DFh Direct memory access Controller
00ECh-00EFh Motherboard resources
00F0h-00FFh Numeric data processor
Intel 82371AB/EB PCI Bus Master IDE
0170h-0177h
controller
0170h-0177h Secondary IDE controller (dual fifo)
Intel 82371AB/EB PCI Bus Master IDE
01F0h-01F7h
controller
01F0h-01F7h Primary IDE controller (dual fifo)
0200h-0203h Gameport Joystick
0220h-022Fh ESS SOLO-1 DOS Emulation
0330h-0331h ESS SOLO-1 DOS Emulation
Intel 82371AB/EB PCI Bus Master IDE
0376h-0376h
Controller
0376h-0376h Secondary IDE controller (dual fifo)
0378h-037Fh ECP Printer Port (LPT1)
0388h-038Bh ESS SOLO-1 DOS Emulation
03B0h-03BBh RAGE LT PRO AGP 2X (English)
03C0h-03Dfh RAGE LT PRO AGP 2X (English)
03E0h-03E1h Motherboard resources
03F0h-03F5h Standard Floppy Disk Controller
Intel 82371AB/EB PCI Bus Master IDE
03F6h-03F6h
Controller
03F6h-03F6h Primary IDE controller (dual fifo)
03F7h-03F7h Standard Floppy Disk Controller
03F8h-03FFh Communications Port (COM1)
04D0h-04D1h Motherboard resource
0CF8h-0CFFh PCI bus
2180h-218Fh Motherboard resources
8000h-803Fh Motherboard resources
Intel 82443BX Pentium ® II Processor to AGP
E000h-EFFFh
controller
E800h-E8FFh RAGE LT PRO AGP 2X (English)
F4D8h-F4DBh ESS SOLO-1 PCI AudioDrive
F4DCh-F4DFh ESS SOLO-1 PCI AudioDrive
F4E0h-F4Efh ESS SOLO-1 PCI AudioDrive
F4F0h-F4FFh ESS SOLO-1 PCI AudioDrive
F800h-F8FFh Lucent 56K V.90 PCI DF Modem
Intel 21143/2 based 10/100 mbps Ethernet
FC00h-FC7Fh
Controller
FC88h-FC8Fh Lucent 56K V.90 PCI DF Modem
FC90h-FC97h Primary IDE controller (dual fifo)
Intel 822371AB/EB PCI Bus Master IDE
FC90h-FC9Fh
Controller
FC98h-FC9F Secondary IDE controller (dual fifo)
FCA0h-FCBFh
Intel 82371AB/EB PCI to USB Universal Host
Controller
FCC0h-FCFFh ESS SOLO-1 PCI AudioDrive
Top of Page
System Memory Catalog
System Memory Catalog
Memory Address System Function
00000000h-0009FFFFh System board extension for PnP BIOS
000A0000h-000AFFFFh RAGE LT PRO AGP 2X (English)
000B0000h-000BFFFFh RAGE LT PRO AGP 2X (English)
000C0000h-000CBFFFh RAGE LT PRO AGP 2X (English)
000E0000h-000E7FFFh Motherboard resources
000E8000h-000FFFFFh System board extension for PnP BIOS
00100000h-03FFFFFFh System board extension for PnP BIOS
08000000h-08000FFFh Texas Instruments PCI-1211 CardBus Controller
F8000000h-FBFFFFFFh Intel 82443BX Pentium ® ll Processor to PCI
bridge
FD000000h-FDFFFFFFh RAGE LT PRO AGP2X (English)
FD000000h-FECFFFFFh Intel 82443BX Pentium ® ll Processor to AGP
controller
FE000000h-FE01FFFFh RAGE LT PRO AGP 2X (English)
FECFE000h-FECFFFFh RAGE LT PRO AGP 2X (English)
FEDFF800h-FEDFFBFFh Intel 21143/2 based 10/100 mbps Ethernet
Controller
FEDFFC00h-FEDFFCFFh Lucent 56K V.90 PCI DF Modem
FFF80000h-FFFFFFFFh Motherboard resources
Display
Dimensions
Height
Width
Display Dimensions
Height
Width
Depth
Weight
15.0" (Diagonal) TFT Display with LVDS
U.S. Metric
9.48 in
12.43 in
8.99 in
11.98 in
Information not available
24.36 oz 690 gm
24.05 cm
31.55 cm
22.81 cm
30.41 cm
Information not
available
Contrast Ratio
Brightness
Total Power Consumption
Top of Page
Dimensions
Height
Width
14.1" (Diagonal) TFT Display with LVDS
Display Dimensions
Height
Width
Depth
150:1 mini
120 cd/mm^3
Information not available
U.S. Metric
8.92 in
11.76 in
8.44 in
11.26 in
Information not
available
22.65 cm
29.85 cm
21.43 cm
28.57 cm
Information not
available
Weight 19.94 oz 565 gm
Contrast Ratio 150:1 mini
Brightness 120 cd/mm^3
Total Power Consumption Information not available
Top of Page
Memory Expansion
System Memory Expansion Board
64-MB
64-MB
Memory Expansion
Total Memory
Memory
64-MB
32-MB 96-MB
64-MB
64-MB
Diskette or LS120 Drive
Capacity per Diskette (High/Low)
Diskette Size
Number of LED Indicators (Read/Write)
Number of Drives Supported
Drive Rotation (rpm)
Transfer Rate (Kbps)
64-MB 128-MB
128-MB 192-MB
Diskette Drive LS120 Drive
1.44 MB/720KB 120 MB
3.5" 3.5"
0 1
1 1
300 720
500 5458
Bytes per Sector
Sectors per Track (High/Low)
Tracks per Side (High/Low)
Access Times
Track-to-Track (ms)
Average (ms)
Setting Time (ms)
Latency Average (ms)
Cylinders (High/Low)
Number of Read/Write Heads
Top of Page
Hard Drive
512 512
18/9
80
3
94
15
100
80 1736
2 2
20
112
800
41.67
Capacity Per Drive
Drive Type
Logical Configuration
Cylinders
Heads
Sectors per track
Bytes per sector
Seek Times
(Typical, Including settling in ms)
Single track
Average
Full stroke
Transfer Rate At Interface
Hard Drive
4.8-GB 6.4-GB 10.0-GB 18.0-GB
4.8-GB 6.4-GB 10.0-GB 18.0-GB
11648
3
190/330
512
8647
4
190/330
512
11968
6
190/330
512
16383
6
Not available
512
4
14
24
33.3 MB/s 33.3 MB/s 33.3 MB/s 33.3 MB/s
4
14
24
4
14
24
2.5 (Read)
12 (Read)
23 (Read)
Top of Page
CD/DVD Drive
Dimensions
Weight
Rotational Speed
Typical Transfer Rate
Sustained Data Transfer
Rate
Access Time
Average Random Access
Time
CD/DVD Drive
4x DVD 6x DVD 24x CD-ROM
128 x 129 x 12.7 mm 128 x 129 x 12.7mm 128 x 129 x 12.7 mm
0.27 kg 0.28 kg <0.27 kg
2300 rpm 3450 rpm 4225 rpm
5400 KB/s
8100 KB/s 3600 KB/s
140 ms
140 ms 120 ms
Spin Up time
Data Buffer Capacity
Top of Page
Battery Pack
Dimensions
Height
Length
Width
Weight
3.8 s <15 s 2.7 s
128 KB 512 KB 128 KB
Battery Pack
Lithium Ion (Li ion) *
0.8 in (20.3 mm)
5.7 in (145 mm)
3.1 in (78.7 mm)
0.90 lb (408.2 g)
Battery Pack Operating Time
2 hr 30 min*
Energy
Nominal Open Circuit Voltage
Capacity
Power
14.4 V
3200 mAH
46.1 WH
Environmental Requirements
Operating Temperature
Non-operating Temperature
Charging Temperature
32° F (0-50° C)
-20° C -60° C
5° C-45° C
*The battery operating time changes depending on your power management settings, system
components, options, and applications you use.
Top of Page
Maintenance & Service Guide
Presario 1800 Series
Models: 1825 and 1800T
| Home Page | Notice | Preface | Product Description | Troubleshooting
Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications
Pin Assignments | Battery Pack Operations
Connector Pin Assignments
This section provides connector pin assignment tables for Compaq Presario 1800 Series Portable
Computers. For more information on connectors, refer to the sections on Back Connectors and Port
Replicator 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
Top of Page
Serial Connector
Connector Pin Signal
1
2
Carrier Detect
Receive Data
3
4
5
6
7
8
9
Keyboard/Mouse
Transmit Data
Data Terminal Ready
Signal Ground
Data Set Ready
Ready to Send
Clear to Send
Ring Indicator
Connector Pin Signal
1
2
3
4
5
6
Data 1
Data 2
Ground
+5 V
Clock 1
Clock 2
Top of Page
External VGA Monitor
Connector Pin Signal
1
2
3
4
5
6
7
8
Red Analog
Green Analog
Blue Analog
Not connected
Ground
Ground Analog
Ground Analog
Ground Analog
Top of Page
9
10
11
12
13
14
15
Universal Serial Bus
+5V
Ground
Monitor Detect
DDC2B Data
Horizontal Sync
Vertical Sync
DDC2B Clock
Connector Pin Signal
1
2
3
4
+5V
Data Data +
Ground
Top of Page
Modem
Connector Pin Signal
1
2
Unused
Tip
3
4
5
6
Ring
Unused
Unused
Unused
Top of Page
TV Out
Connector Pin Signal
1
2
Ground
Composite
3
Ground
Top of Page
Game Port
Connector Pin Signal
1
2
3
4
5
+5V
SWA
RBTA
GND
GND
6
7
8
9
10
11
12
13
14
RBTB
SWB
+5V
+5V
SWC
RBTC
RMSO
RBTD
SWD
15
RMSI
Top of Page
S Video
Connector Pin Signal
1
2
3
4
Ground
Ground
SYR
SCG
Top of Page
Port Replicator Connector
Pin Signal Pin Signal Pin Signal Pin Signal
1 Adapter Power 21 Serial Port CTS 41 Not Connected 61 Switch C
2 Adapter Power 22 Serial Port DCD 42 Power Cycle 62 Switch D
3 Adapter Power 23 Serial Port DSR 43 Keyboard Clock 63 MIDI Input
4 Adapter Power 24 Serial Port TXD 44 Keyboard Data 64 MIDI Output
5 Adapter Power 25 Serial Port RTS 45 Mouse Clock 65 Not Connected
6 Adapter Power 26 Monitor DDC 46 Mouse Data 66 USB Power
7 Not Connected 27 Monitor DDC 47 Lp Select 67 USB Power
8 Printer Data 0 28 Monitor Indicator 48 Lp Paper End 68 USB Power
9 Printer Data 1 29 V. SYNC 49 Lp Initialize 69 USB Power
10 Printer Data 2 30 Ground 50 Lp Busy 70 USB A11 Printer Data 3 31 H.SYNC 51 Lp Error 71 USB A+
12 Printer Data 4 32 Ground 52 Lp Acknowledge 72 USB B13 Printer Data 5 33 Blue 53 Lp AutoFeed 73 USB B+
14 Printer Data 6 34 Ground 54 Lp Strobe 74 5V
15 Printer Data 7 35 Green 55 Joystick Data A 75 5V
16 Lp Indicator 36 Ground 56 Joystick Data B 76 Not Connected
17 Port Replicator Dock
Indicator
18 Serial Port RXD 38 Ground 58 Joystick Data D 78 Ground
19 Serial Port RI 39 Composite TV Out 59 Switch A 79 S-Video SCG
20 Serial Port DTR 40 Not Connected 60 Switch B 80 Ground
37 Red 57 Joystick Data C 77 S-Video SYR
Top of Page
Maintenance & Service Guide
Presario 1800 Series
Models: 1825 and 1800T
| Home Page | Notice | Preface | Product Description | Troubleshooting
Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications
Pin Assignments | Battery Pack Operations
Battery Pack Operations
This appendix 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
NOTE:
The power consumption requirements for PC Cards vary widely. Some cards drain 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 guidelines:
● Set the power conservation levels in the Power Management utility to Maximum.
● Customize the timeout value to work more efficiently with the applications. The length 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.
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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 battery charging status icon turns off. Your
battery gauge may show four bars (and Windows may report 100%) before the battery charging status icon
turns off. Do not unplug the AC adapter until the battery charging status icon disappears.
2. Unplug the AC adapter and allow the battery to drain until the computer reaches hibernation and turns itself
off. Do not plug in the AC adapter during this process or you will need to restart with Step 1. You
may use the computer while the battery is draining.
3. Plug in the AC adapter and begin using the computer.
The table below shows the approximate battery pack charge times.
Approximate Battery Charge Time
Computer On Line Off Line
Li ion Battery Pack 4.5 hours 2:50 hrs
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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 exposes potentially harmful battery components.
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Maintenance & Service Guide
14.1 " TFT
Celeron 400-MHz w/128 Cache
4.8 GB
24x CD-ROM
3.5" Floppy Drive
64 MB
Presario 1800 Series
Models: 1825 and 1800T
| Home Page | Notice | Preface | Product Description |
Troubleshooting
Illustrated Parts Catalog | Removal & Replacement Procedures |
Specifications
Pin Assignments | Battery Pack Operations
Models and Features
Models and
Features
Controls and
Lights
Internet
Zone
Buttons and
Lights
Front Bezel
Components
Left Side
Components
Right Side
Components
Bottom of
Unit
Compaq Presario 1800 Series Portable Computer Models
Display
Processor
Hard Drive
CD or DVD Drive
Diskette Drive
Modem
Networking
Battery
System Memory
Display
Model 1825
15.0" TFT
Pentium II/366-MHz w/256 Cache
6.4-GB
4x DVD Drive
3.5" Floppy Drive
56.0 Kbps Data/Fax with PCI
10/100TX Integrated Ethernet
sLi ion
64 MB
Model 1800T CTO (Configure to Order)
Back
Connectors
Port
Replicator
Components
Port
Replicator
Connectors
Power
Management
for Windows
98
Processor
Hard Drive
CD or DVD Drive
Diskette Drive
Modem
Networking
System Memory
56.0 Kbps Data/Fax with PCI
10/100TX Integrated Ethernet
Maintenance & Service Guide
Presario 1800 Series
Models: 1825 and 1800T
| Home Page | Notice | Preface | Product Description |
Illustrated Parts Catalog | Removal & Replacement Procedures |
Pin Assignments | Battery Pack Operations
Product Description
Troubleshooting
Specifications
Models and
Features
Controls and
Lights
Internet
Zone
Buttons and
Lights
Front Bezel
Components
Left Side
Components
Right Side
Components
Bottom of
Unit
Back
Connectors
Port
Replicator
Components
Port
Replicator
Connectors
Power
Management
for Windows
98
Controls
and
Lights
1. Display
Release
Latch
2. Display
3. Power
(On/Off)
Button
4.
Keyboard
5. Touch
Pad
6.
Integrated
Speakers
7. Touch
Pad
Button
(Left)
8. Scroll
Up/Down
Button
9. Touch
Pad
Button
(Right)
10. Model
Number
Maintenance & Service Guide
Presario 1800 Series
Models: 1825 and 1800T
| Home Page | Notice | Preface | Product Description | Troubleshooting
Illustrated Parts Catalog | Removal & Replacement Procedures |
Specifications
Pin Assignments | Battery Pack Operations
Product Description
Models and
Features
Controls and
Lights
Internet
Zone
Buttons and
Lights
Front Bezel
Components
Left Side
Components
Right Side
Components
Bottom of
Unit
Internet Zone
Buttons and
Lights
1. AC Adapter
Light
2. Cap Lock Light
3. Instant
Internet Access
Button
4. Instant E-Mail
Button
5. My Presario
Instant Access
Button
6. Power Button
Back
Connectors
Port
Replicator
Components
Port
Replicator
Connectors
Power
Management
for Windows
98
7. Instant Search
Button
8. Online
Marketplace
Button (US/Puerto
Rico), Instant
Answer Button
(countries outside
the US)
9. Retail Central
Button (US/Puerto
Rico), Instant ECommerce Button
(countries outside
the US)
10. Num Lock
Light
11. Scroll Lock
Light
Maintenance & Service Guide
Presario 1800 Series
Models: 1825 and 1800T
| Home Page | Notice | Preface | Product Description | Troubleshooting
Illustrated Parts Catalog | Removal & Replacement Procedures |
Specifications
Pin Assignments | Battery Pack Operations
Product Description
Models and
Features
Controls and
Lights
Internet
Zone
Buttons and
Lights
Front Bezel
Components
Left Side
Components
Right Side
Components
Bottom of
Unit
Back
Connectors
Port
Replicator
Components
Front Bezel
Components
1. Previous
Track Button
2. Next Track
Button
3. Sleep Status
Icon
4. Power Status
Icon
5. Battery
Charging Status
Icon
6. DisqPlay
Status Icon
7. Battery
Gauge
8. DisqPlay
On/Off Button
9. Volume
Down Button
Port
Replicator
Connectors
Power
Management
for Windows
98
10.Volume Up
Button
11. Play/Pause
Button
12. Stop Button
Maintenance & Service Guide
Presario 1800 Series
Models: 1825 and 1800T
| Home Page | Notice | Preface | Product Description | Troubleshooting
Illustrated Parts Catalog | Removal & Replacement Procedures |
Specifications
Pin Assignments | Battery Pack Operations
Product Description
Models and
Features
Controls and
Lights
Internet
Zone
Buttons and
Lights
Front Bezel
Components
Left Side
Components
Right Side
Components
Bottom of
Unit
Back
Connectors
Port
Replicator
Components
Left Side
Components
with
Diskette
Drive
1. Security Slot
2. CD or DVD
Drive
3. CD or DVD
Drive Eject Button
4. CD or DVD
Drive Manual Eject
Hole
5. Diskette Drive
6. Diskette Drive
Eject Button
Left Side
Components with
LS120 Drive
Port
Replicator
Connectors
Power
Management
for Windows
98
Maintenance & Service Guide
Presario 1800 Series
Models: 1825 and 1800T
| Home Page | Notice | Preface | Product Description | Troubleshooting
Illustrated Parts Catalog | Removal & Replacement Procedures |
Specifications
Pin Assignments | Battery Pack Operations
Product Description
Left Side Components
with LS120 Drive
1. Security Slot
2. CD or DVD Drive
3. CD or DVD Drive Eject
Button
4. CD or DVD Drive Manual
Eject Hole
5. LS120 Drive
6. LS120 Drive Eject
Button
7. LS120 Drive Manual
Eject Hole
Back to Left Side Components with
Diskette Drive
Maintenance & Service Guide
Presario 1800 Series
Models: 1825 and 1800T
| Home Page | Notice | Preface | Product Description | Troubleshooting
Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications
Pin Assignments | Battery Pack Operations
Product Description
Models and
Features
Controls and
Lights
Internet
Zone
Buttons and
Lights
Front Bezel
Components
Left Side
Components
Right Side
Components
Bottom of
Unit
Right Side
Components
1. Battery
Compartment
2. PC Card Eject
Button
3. PC Card Slot
4. Headphone
Jack
5. Microphone
Jack
6. Modem Port
7. Ethernet Port
Back
Connectors
Port
Replicator
Components
Port
Replicator
Connectors
Power
Management
for Windows
98
Maintenance & Service Guide
Presario 1800 Series
Models: 1825 and 1800T
| Home Page | Notice | Preface | Product Description | Troubleshooting
Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications
Pin Assignments | Battery Pack Operations
Product Description
Models and
Features
Controls and
Lights
Internet
Zone
Buttons and
Lights
Front Bezel
Components
Left Side
Components
Right Side
Components
Bottom of
Unit
Bottom of Unit
1. Stand Feet
2. Serial Number
3. Memory
Compartment Door
Back
Connectors
Port
Replicator
Components
Port
Replicator
Connectors
Power
Management
for Windows
98
Maintenance & Service Guide
Presario 1800 Series
Models: 1825 and 1800T
| Home Page | Notice | Preface | Product Description | Troubleshooting
Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications
Pin Assignments | Battery Pack Operations
Product Description
Models and
Features
Controls and
Lights
Internet
Zone
Buttons and
Lights
Front Bezel
Components
Left Side
Components
Right Side
Components
Bottom of
Unit
Back
Connectors
Back
Connectors
1. Keyboard/Mouse
Port
2. AC
Adapter Connector
3. Parallel Port
4. Port Replicator
Connector
5. Fan Vent
6. TV Out Connector
7. External Monitor
Port
8. Serial Port
9. Universal Serial
Bus Port
Port
Replicator
Components
Port
Replicator
Connectors
Power
Management
for Windows
98
Maintenance & Service Guide
Presario 1800 Series
Models: 1825 and 1800T
| Home Page | Notice | Preface | Product Description | Troubleshooting
Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications
Pin Assignments | Battery Pack Operations
Product Description
Models and
Features
Controls and
Lights
Internet
Zone
Buttons and
Lights
Front Bezel
Components
Left Side
Components
Right Side
Components
Bottom of
Unit
Port
Replicator
Components
1. Port
Replicator
Interface
Connector
2. Port
Replicator Guide
Posts
Back
Connectors
Port
Replicator
Components
Port
Replicator
Connectors
Power
Management
for Windows
98
Maintenance & Service Guide
Presario 1800 Series
Models: 1825 and 1800T
| Home Page | Notice | Preface | Product Description | Troubleshooting
Illustrated Parts Catalog | Removal & Replacement Procedures |
Specifications
Pin Assignments | Battery Pack Operations
Product Description
Models and
Features
Controls and
Lights
Internet
Zone
Buttons and
Lights
Front Bezel
Components
Left Side
Components
Right Side
Components
Bottom of
Unit
Port
Replicator
Back
Connectors
1. Universal Serial
Bus Port
2. Universal Serial
Bus Port
3. Power (AC
Adapter) Connector
4. Keyboard/Mouse
Port
5. Keyboard/Mouse
Port
6. Parallel Port
Back
Connectors
Port
Replicator
Components
Port
Replicator
Connectors
Power
Management
for Windows
98
7. Game Port
8. Serial Port
9. External Monitor
Port
10. S Video
11. (Composite)
TV Out
Maintenance & Service Guide
Presario 1800 Series
Models: 1825 and 1800T
| Home Page | Notice | Preface | Product Description | Troubleshooting
Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications
Pin Assignments | Battery Pack Operations
Power Management for Windows 98
The following power management features are available for conserving AC power and extending battery operating time:
● Power Management Settings
● Hibernation Mode
● Sleep Mode
● Battery Operating Time
● Rebooting After a Lockup
● Recovering From a Loss of Electrical Power
● Servicing the Computer - Full Off Mode
Power Management Settings
Differing patterns of computer use determine the level of power management. These different power management levels
can be activated based on the amount of time passed since the last system activity. System activity examples include
keyboard or mouse movement, DVD/CD playback (while under program control that monitors Sleep), and modem use.
Select different power settings or schemes through Power Management.The optional settings are Home/Office Desk,
Portable/Laptop, and Always On. Change the following settings from the default settings:
● when the computer goes into Sleep (Standby) mode
● when the screen times out and goes blank
● when the hard drive goes into low power mode.
Each of these system components sleeps after the selected or default periods of inactivity. (The setting for hard drive must
be less than or equal to the setting for System.)
IMPORTANT:
If the computer is on a network, Compaq recommends System Standby be set to Never.
There are five categories of power management settings under the Control Panel. The default setting for each feature is
listed below in the tables.
Power Management Properties
Always on Plugged in Running on Batteries
System Standby
Turn OFF Monitor
Turn OFF Hard Disks
Never 5 minutes
15 minutes 2 minutes
1 hour 3 minutes
Portable/Laptop Plugged in Running on Batteries
System Standby
Turn OFF Monitor
Turn OFF Hard Disks
Never 15 minutes
3 hours Never
15 minutes 10 minutes
Home/Office Desk Plugged in Running on Batteries
System Standby
Turn OFF Monitor
Turn OFF Hard Disks
20 minutes 1 minute
15 minutes 2 minutes
30 minutes 10 minutes
CAUTION: The settings on the Alarms tab have been preset for the computer to run at
its best. Changing any of these settings could cause the computer to function improperly.
It is recommended that these settings be left at their default values.
Power Management Properties
Alarms:
Low Battery Alarm: 10%
Critical Battery Alarm 0%
Alarm Actions: Notification: Text
Power Mode: No Action
Compaq Presario 1800 Series Computers have two levels of power management: Hibernation and Sleep.
Hibernation mode occurs by pressing the Power button once. The computer saves the contents of the computer memory
to the hard drive. This is followed by the computer turning off.
Sleep mode is a low-power mode, also referred to as Standby mode. It occurs by pressing the Fn+F4 function key or by
clicking the Start button, then Shutdown, then Standby.
CAUTION: While in Sleep mode, the computer will maintain system information and open
files. Unsaved information will be lost if the computer is turned off prior to system wakeup, or if a power loss occurs while using the AC adapter.
The following table shows the conditions and indicators for getting in and out of the various power management modes,
Sleep, Hibernation, and Off.
Hibernation and Sleep Functions
Mode To Initiate To End Indicators
Manual - Fn+F4 key
Flashing Power light*
combination or click the Start
Sleep
button on the Windows Taskbar,
then point to Shutdown, then
click Standby.
Time-Out Default - 15 minutes
Press any key.
*Moon icon appears on status display
(1800 Series only)
if using battery power.
Computer will not automatically
enter Sleep mode if on AC
power.
Manual - Press Power Button
Power light is off, screen is blank*
once
*Power icon does not appear on status
Hibernate
Press Power
display (1800 Series only)
Button once
Off
Time-Out Default - If your
battery is low or after 1 hour of
Sleep. Computer will not
automatically enter Hibernation
mode if on AC power.
Standard - Perform normal
Windows shutdown using the
Start button on the Windows
Taskbar.
Manual* - Press and hold down
the Power button for 4 seconds.
*The Manual shutdown mode is
not recommended unless the
Standard shutdown mode does
not work.
Press Power
Button once
No Power light (or icon), screen is blank.
Hibernation Mode
Hibernation helps conserve battery life and protect the data. Hibernation can be a routine power-saving event or the result
of a low battery. As the computer enters Hibernation, it automatically saves the content of the computer memory to the
hard drive before it turns off.
The computer will automatically enter Hibernation mode when the battery has little power left or when the computer
(operating on battery power) has been in Sleep mode for more than one hour. Activate Hibernation mode by pressing the
Power button once.
To restart the computer, press the Power button once. When the computer enters or wakes from Hibernation mode, it
displays a Progress window.
Top of Page
Sleep Mode
Selecting Sleep mode instead of turning off the computer when finished allows the computer to wake up faster than turning
it completely off and saves power over the active (On) mode.
Activate Sleep mode by pressing Fn+F4. Or, click Start, select the Shut Down option, and click Standby.
Servicing the Computer - Full Off Mode
The computer must be turned off completely when installing or replacing components in the system. Follow the instructions
above for properly putting the computer into Off mode, unplug from the outlet, and remove the battery
(see battery
section for instruction on removing battery).
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Rebooting After a Lockup
To reboot the computer (as if from a cold start), when the keyboard is frozen or the screen is locked, press and hold down
the Power button for at least four seconds, which will cause a manual shutdown. Then, restart it with a single press of the
Power button. If it still does not recover, press the Power button and hold for four seconds to shut it down, then remove
the battery or unplug the AC power for at least 30 seconds. Reinsert the battery or reconnect AC power and press the
Power button once to reboot.
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Recovering From a Loss of Electrical Power
Loss of electrical power will cause the Internet PC to automatically turn off. This may cause loss of data because the
Microsoft Windows operating system is not able to properly close all files and programs.
Loss of power may be caused by one of the following:
● Electrical power service is interrupted.
● The power cord is accidentally disconnected.
If power surges or sags, the display and status lights may flicker, and the computer may automatically restart. If an
improper shutdown occurs, ScanDisk, a Microsoft Windows utility program, will automatically run once power is restored.
ScanDisk will determine if the improper shutdown caused any errors on the hard disk. These errors may occur if the
Microsoft Windows operating system was not able to properly close all files before the shutdown. If no errors are found, the
restart process will continue. If ScanDisk does detect errors, follow the instructions shown to continue the restart process.
Work that was not saved prior to the lockup may be lost.
Use of a surge suppressor, line conditioner, or uninterruptible power supply (UPS) may protect the computer from damage
caused by power surges or sags.
If a power failure occurs or the power cord disconnects while the computer is turned on, turn off the computer until normal
service has been restored. ScanDisk may run to check the hard disk for errors caused by the improper shutdown the next
time the computer turns on.
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Battery Operating Time
Battery operating time is affected by variables such as the following:
● Power conservation settings
● Hardware configuration
● Software applications
● Installed options
● Display brightness
● Hard drive usage
● Changes in operating temperature
● Type and number of installed PC Cards
For more information on increasing battery pack operating time, conditioning the battery pack, and disposing of a used
battery pack, refer to the
Battery Pack Operations.
Top of Page
Maintenance & Service Guide
Presario 1800 Series
Models: 1825 and 1800T
| Home Page | Notice | Preface | Product Description | Troubleshooting
Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications
Pin Assignments | Battery Pack Operations
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 Computer Checkup.
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.
IMPORTANT:
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.
If the problem only occurs when an external device is connected to the computer,
the problem may be related to the external device or its cable. Verify this by
running POST with and without the external device connected.
When the preliminary steps are completed, you are ready to run
Return to Troubleshooting
POST.
Maintenance & Service Guide
Presario 1800 Series
Models: 1825 and 1800T
| Home Page | Notice | Preface | Product Description |
Troubleshooting
Illustrated Parts Catalog | Removal & Replacement Procedures |
Specifications
Pin Assignments | Battery Pack Operations
Troubleshooting
Clearing the Power-on Password
Clearing the power-on
password requires removing
all Setup attributes that are
programmed in the CMOS.
The RTC battery is located
on the system board directly
forward of the fan.
If the password is not known,
clear it by performing the
following steps:
1. Turn off the computer.
2. Disconnect the power cord.
3. Remove the
4. Remove the palmrest cover
with touchpad.
battery pack.
5. Remove the keyboard.
6. Remove the heatspreader.
7. Slide the black switch
toward the front of the
computer to clear CMOS. Hold
the switch in the forward
position for at least 15
seconds to ensure that the
password is cleared. The
switch is located on the back
of the DVD or CD drive in the
middle of the system board.
8. Reassemble the computer.
9. Turn on the computer to
verify that the power-on
password has been cleared. If
it has not been cleared,
repeat Steps 1 through 9.
Return to
Troubleshooting
Maintenance & Service Guide
Presario 1800 Series
Models: 1825 and 1800T
| Home Page | Notice | Preface | Product Description | Troubleshooting
Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications
Pin Assignments | Battery Pack Operations
Power-On Self Test (POST)
Running POST
To run POST, complete these directions:
Turn off the computer, then turn on the computer. As soon as the Compaq logo appears press the ESC key to clear the logo
and display the POST messages as they occur.
If POST does not detect any errors, the computer will not beep. This indicates successful completion of the 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.
NOTE:
Probable Cause Recommended Action
If the system is not functioning well enough to run POST, or if the display is not functioning well enough to show
POST error messages, refer to the Troubleshooting tables.
Power-On Self-Test Messages
102-System Board Failure
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
configuration has been set.
RAM failure 1. Replace the memory modules.
Memory test data error 1. Replace the memory modules.
XX000YZZ RAM failure Replace the system board.
Run Computer Setup.
2. Replace the system board.
2. Replace the system board.
XX000YZZ 201-Memory Error
Probable Cause Recommended Action
Probable Cause Recommended Action
Keyboard failure 1. Ensure the keys are not depressed during POST.
304-Keyboard or System Unit Error
Probable Cause Recommended Action
Keyboard or system board error 1. Replace the keyboard.
1. Replace the memory modules.
2 Replace the system board.
301-Keyboard Error
2. Reconnect the keyboard with the computer off.
3. 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 diskette
controller
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).
1. Run Computer Checkup (TEST).
2. Check and/or replace cables.
3. Replace the system board.
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.
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Return to Troubleshooting
Maintenance & Service Guide
Presario 1800 Series
Models: 1825 and 1800T
| Home Page | Notice | Preface | Product Description | Troubleshooting
Illustrated Parts Catalog | Removal & Replacement Procedures |
Specifications
Pin Assignments | Battery Pack Operations
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 problem you cannot solve, run the Diagnostics utilities before you call for support. Run
Computer Checkup and select to save the device list to a file and to print or to save the log of errors. Run
the View System Information (INSPECT) utility and select to print or to 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.
NOTE:
9. Select one of the following from the Test Option menu:
If the list is incorrect, ensure that any new devices are installed properly.
■ Quick Check Diagnostics. Runs a quick, general test on each device with a minimal
number of prompts. If errors occur, they display 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 how many times to run the tests, to stop on errors,
or to print or 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 or
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.
Top of Page
Return to Troubleshooting
Maintenance & Service Guide
Presario 1800 Series
Models: 1825 and 1800T
| Home Page | Notice | Preface | Product Description |
Troubleshooting
Illustrated Parts Catalog | Removal & Replacement Procedures |
Specifications
Pin Assignments | Battery Pack Operations
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.
IMPORTANT:
Ensure that there is no diskette in the diskette drive and that 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.
Return to Troubleshooting
Maintenance & Service Guide
Presario 1800 Series
Models: 1825 and 1800T
| Home Page | Notice | Preface | Product Description |
Troubleshooting
Illustrated Parts Catalog | Removal & Replacement Procedures |
Specifications
Pin Assignments | Battery Pack Operations
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.
Retest the system after completing each step. If the problem
IMPORTANT:
has been resolved, do not proceed with the remaining steps.
For the removal and replacement of a particular subassembly, see
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 or LS120 Drive Test
1101 Serial Test
1701 through 1736 Hard Drive Test
501 through 516 Video Test
2402 through 2456
2458 through 2480
3206 Audio Test
8601 through 8602 TouchPad Pointing Device Test
3301 through 6623 DVD or CD Test
Processor Test Error Codes
Error
Code Description Recommended Action
101-xx CPU test failed Replace the processor and retest.
102-xx Coprocessor or Weitek Error 1. Run the Configuration and Diagnostics
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
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 Self-test/Interface Test
302-xx Failed Individual Key Test
304-xx Failed Keyboard Repeat Test
2. Replace the system board and retest.
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.
Parallel Printer Test Error Codes
401-xx Printer failed or not connected 1. Connect the printer.
2. Check power to the printer.
402-xx Failed Port Test
403-xx Printer pattern test failed
Diskette or LS 120 Drive Test
600-xx
601-xx Diskette or LS120 format failed
602-xx Diskette or LS 120 read test failed
603-xx
604-xx
605-xx Diskette or LS120 ID media failed
Diskette or LS120 ID drive types test
failed
Diskette or LS120 write, read,
compare test failed
Diskette or LS120 random read test
failed
3. Install the loop-back connector and
retest.
4. Check port and IRQ configuration.
5. Replace the system board and retest.
1. Replace the diskette media and retest.
2. Check and/or replace the diskette power
and signal cables and retest.
3. Replace the diskette or LS120 drive and
retest.
4. Replace the system board and retest.
606-xx Diskette or LS120 speed test failed
609-xx
610-xx
697-xx Diskette or LS120 type error
698-xx
699-xx
1101-xx
1701-xx Hard drive format test failed 1. Run the Configuration and Diagnostics
1702-xx Hard drive read test failed
1703-xx
1704-xx Hard drive random seek test failed
Diskette or LS120 reset controller test
failed
Diskette or LS120 change line test
failed
Diskette or LS120 drive speed not
within limits
Diskette or LS120 drive/media ID
error
Serial Test Error Codes
Serial port test failed 1. Check port configuration
Hard Drive Test Error Codes
Hard drive write/read/compare test
failed
1. Replace media.
2. Run the Configuration and Diagnostics
Utilities.
2. Replace the system board and retest.
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.
1705-xx Hard drive controller test failed
1706-xx Hard drive ready test failed
1707-xx Hard drive recalibration test failed
1708-xx Hard drive format bad track test failed
1709-xx Hard drive reset controller test failed
1710-xx Hard drive park head test failed
1715-xx Hard drive head select test failed
1716-xx
1717-xx Hard drive ECC* test failed
1719-xx Hard drive power mode test failed
1724-xx Network preparation test failed
1736-xx Drive monitoring test failed
* ECC = Error Correction Code
Hard drive conditional format test
failed
Video Test Error Codes
501-xx Video controller test failed The following steps
502-xx Video memory test failed
503-xx Video attribute test failed
504-xx Video character set test failed
505-xx
506-xx
507-xx Video 40 x 25 mode test failed
508-xx
509-xx
510-xx Video 640 x 200 mode test failed
511-xx Video screen memory page test failed
512-xx Video gray scale test failed
Video 80 x 25 mode 9 x 14 character
cell test failed
Video 80 x 25 mode 8 x 8 character
cell test failed
Video 320 x 200 mode color set 0 test
failed
Video 320 x 200 mode color set 1 test
failed
apply to error codes 501-xx through 516xx:
1. Disconnect external monitor and test
with internal LCD display.
2. Replace the display assembly and retest.
3. Replace the system board and retest.
514-xx Video white screen test failed
516-xx Video noise pattern test failed
2402-xx Video memory test failed The following steps apply to error codes
2403-xx Video attribute test failed
2404-xx Video character set test failed
2405-xx
2406-xx
2408-xx
2409-xx
2410-xx Video 640 x 200 mode test failed
2411-xx Video screen memory page test failed
2412-xx Video gray scale test failed
Video 80 x 25 mode 9 x 14 character
cell test failed
Video 80 x 25 mode 8 x 8 character
cell test failed
Video 320 x 200 mode color set 0 test
failed
Video 320 x 200 mode color set 1 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.
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
Utilities.
2421-xx ECG/VGC 640 x 200 graphics mode
test failed
2422-xx ECG/VGC 640 x 350 16 color set test
failed
2423-xx ECG/VGC 640 x 350 64 color set test
failed
2424-xx ECG/VGC monochrome text mode test
failed
2. Disconnect external monitor and test
with internal LCD display.
3. Replace the display assembly and retest.
4. Replace the system board and retest.
2425-xx ECG/VGC monochrome graphics mode
test failed
2431-xx 640 x 480 graphics test failure
2432-xx 320 x 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
DVD or CD Drive Test Error Codes
3301-xx DVD or CD drive read test failed 1. Replace the DVD or CD and retest.
2. Verify that the speakers are connected.
3305-xx DVD or CD 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 DVD or CD drive and retest.
5. Replace the system board and retest.
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