HP 1825, 1800T Service Manual

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
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
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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
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.
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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
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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
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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
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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
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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
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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
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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)
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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
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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.
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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
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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
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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
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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
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Modem
Connector Pin Signal
1
2
Unused
Tip
3
4
5
6
Ring
Unused
Unused
Unused
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TV Out
Connector Pin Signal
1
2
Ground
Composite
3
Ground
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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
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S Video
Connector Pin Signal
1
2
3
4
Ground
Ground
SYR
SCG
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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
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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
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
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
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
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
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
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
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
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
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
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.
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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.
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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.
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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
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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