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Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1255, 1257, 1260, 1262, 1266, and 1267

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Maintenance & Service Guide

Presario 1200 Series

Models: 1255, 1257, 1260, 1262, 1266, and 1267

| Home Page | Notice | Preface | Product Description | Troubleshooting

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Welcome to the Maintenance & Service Guide for the Presario 1255

through 1267 series...

Notice

Preface

Product

Description

Troubleshooting

Illustrated Parts

Catalog

Removal &

Replacement

Procedures

Specifications

Connector Pin

Assignments
Battery Pack

Operations

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This online guide is designed to serve the needs of those whose job it is to

repair Compaq products.

Click to download a ZIP file containing the complete Maintenance & Service Guide for this product.

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

For content comments or questions, contact the Editor.

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

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Maintenance & Service Guide

Presario 1200 Series

Models: 1255, 1257, 1260, 1262, 1266, and 1267

| 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.

Ó 1999 Compaq Computer Corporation.
All rights reserved. Printed in the U.S.A.

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

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

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

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

Maintenance and Service Guide

Compaq Presario 1200 Series Portable Computers

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First Edition (February 1999)
Compaq Computer Corporation

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Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, and 1252

United States June 27, 104

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Maintenance & Service Guide

Presario 1200 Series

Models: 1255, 1257, 1260, 1262, 1266, and 1267

| 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 1200 Series Portable Computers.

Compaq Computer Corporation reserves the right to make changes to the Compaq Presario 1200 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.

NOTE:

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

Technician Notes

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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 1200 Series Portable Computer documentation set

● Introducing Windows 95 Guide

● Service Training Guides

● Compaq Service Advisories and Bulletins

● Compaq QuickFind

● Compaq Service Quick Reference Guide

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United States June 27, 104

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STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US |

Maintenance & Service Guide

Presario 1200 Series

Models: 1255, 1257, 1260, 1262, 1266, and 1267

| 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
Left Side

Components
Right Side

Components
Bottom of Unit
Rear Connectors
Power

Management for
Windows 98

Compaq

Presario
Portable
Computers...

are a
continuation
of new
generation
multimedia
portable
computers
with
innovative
integrated
designs,
outstanding
audio and
video,
advanced
core
features,
and
attractive
styling.

This full­function,

AMD-K6 or

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Pentium­based
portable
computer
allows full
desktop
functionality.

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Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1255, 1257, 1260, 1262, 1266, and 1267

United States June 27, 104

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STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US |

Maintenance & Service Guide

Presario 1200 Series

Models: 1255, 1257, 1260, 1262, 1266, and 1267

| 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
Power-On Self Test

(POST)
Compaq Diagnostics
Diagnostic Error Codes
Troubleshooting

Without Diagnostics
Solving Minor

Problems
Contacting Compaq

Support

This section covers troubleshooting information for the
Compaq Presario 1200 Series Portable Computers. The
basic steps in troubleshooting include:

1. Follow the Preliminary Steps.

2. Run the Power-On Self-Test
(POST).

3. Follow the recommended
actions described in the
diagnostic tables, if you are
unable to run POST or if POST
displays an error message.

When following the recommended
actions in the Sections on POST and

Diagnostic Error Codes, perform them

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

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NOTE:

If the problem is
intermittent, check the
computer several times to
verify that the problem is
solved.

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United States June 27, 104

COMPAQ

STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US |

Maintenance & Service Guide

Presario 1200 Series

Models: 1255, 1257, 1260, 1262, 1266, and 1267

| Home Page | Notice | Preface | Product Description | Troubleshooting

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Illustrated Parts Catalog

This section provides a breakdown and identifies the spare parts ordering number associated with each

item for the Compaq Presario 1200 Series Portable Computers.

System Unit

Boards

Display Assembly

Mass Storage Devices

Miscellaneous Cable Kit

Cables

Miscellaneous Hardware &

Plastics Kit

Miscellaneous Parts

Documentation & Software

Compaq Home

Search

Products

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Worldwide

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Revised: 25 February 1999

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United States June 27, 104

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STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US |

Maintenance & Service Guide

Presario 1200 Series

Models: 1255, 1257, 1260, 1262, 1266, and 1267

| 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

Disassembly
Sequence

Electrostatic
Discharge

Service
Considerations

Cables and
Connectors

Preparing the
Computer for
Disassembly

Battery Pack
Palmrest

Cover with
Touch Pad

Heatspreader
Keyboard

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Processor
Hard Drives
CD Drive
Battery

Charger Board
Modem
Display Panel

Assembly
Upper CPU

Cover
Speaker

Assembly
Diskette Drive
Fan Assembly
System Board

Dip Switch
Settings

Memory
Module

Report the computer [ ] serial number to Compaq when

requesting information or ordering spare parts.

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United States June 27, 104

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Maintenance & Service Guide

Presario 1200 Series

Models: 1255, 1257, 1260, 1262, 1266, and 1267

| Home Page | Notice | Preface | Product Description | Troubleshooting

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Specifications

This chapter covers the following specifications of Compaq Presario 1200 Series Portable Computers:

System interrupts

System DMA

System I/O Address

System memory Catalog

Physical & environmental

Display

Memory Expansion

Battery Pack

Diskette Drive

Hard Drive

CD Drive

Physical and Environmental

Computer Specifications

U.S. Metric

Dimensions

Height

Depth
Width

1.97 in

12.20 in

10.08 in

4.95 cm

31.00 cm

25.40 cm

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Weight

Model 1234
Model 1235
Model 1236
Model 1237
Model 1238
Model 1240
Model 1242
Model 1250
Model 1252

7.326 LB

7.326 LB

7.326 LB

7.326 LB

7.326 LB

7.326 LB

7.326 LB

7.326 LB

7.326 LB

3.33 kg

3.33 kg

3.33 kg

3.33 kg

3.33 kg

3.33 kg

3.33 kg

3.33 kg

3.33 kg

Stand-Alone (Battery Pack) Power

Requirements

Nominal Operating
Maximum Average

Peak Operating

NiMH

W @ 9.6 V
W @ 9.6 V
W @ 9.6 V

Li-ion

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

AC Power Requirements

Operating Voltage
Operating Current

Operating Frequency

Maximum Transient

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

50° to 95 °F 10° to 35 °C

Non-operating

-4° to 140 °F -20° to 60 °C

Relative Humidity (non-condensing)

Operating

10 to 90% 35°C to 90%

Non-operating (tw = 38.7°C max)

5 to 95% 60°C to 95%

Altitude

Operating

0 to 10,000 ft 0 to 3.15 km

Non-operating

0 to 30,000 ft 0 to 9.14 km

Shock

Operating

10 G, 11 ms, half sine

Non operating

240 G, 2 ms, half sine

Vibration

Operating

0.5 G

Non-operating

1.5 G

NOTE: Applicable product safety standards specify thermal limits for plastic surfaces. Compaq

Presario 1200 Series Portable Computers operate well within this range of temperatures.

Return to the Top.

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Compaq Home

Search

Products

Service

Worldwide

Compaq.com

Legal Notices and Privacy Statement

Revised: 25 February 1999

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Compaq.com

United States

Maintenance & Service Guide

Presario 1200 Series

Models: 1255, 1257, 1260, 1262, 1266, and 1267

| Home Page | Notice | Preface | Product Description | Troubleshooting

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Connector Pin Assignments

This appendix provides connector pin assignment tables for Compaq Presario 1200 Series Portable
Computers. For more information on connectors, refer to the section on Rear Connectors.

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

Click on a link:

● Parallel Connector

● Serial Connector

● Keyboard/Mouse

● External VGA Monitor

● Universal Serial Bus

● Modem

Parallel Connector

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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

Return to the top.

Serial Connector

Connector Pin Signal

1

2

3

4

5

6

7

8

9

Carrier Detect

Receive Data

Transmit Data

Data Terminal Ready

Signal Ground

Data Set Ready

Ready to Send

Clear to Send

Ring Indicator

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Return to the top.

Keyboard/Mouse

Connector Pin Signal

1

2

3

4

5

6

Data 1

Data 2

Ground

+5 V

Clock 1

Clock 2

Return to the top.

External VGA Monitor

Connector Pin Signal

1

2

3

4

5

6

7

8

9

10

Red Analog

Green Analog

Blue Analog

Not connected

Ground

Ground Analog

Ground Analog

Ground Analog

Not connected

Ground

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11

12

13

14

15

Monitor Detect

DDC2B Data

Horizontal Sync

Vertical Sync

DDC2B Clock

Return to the top.

Universal Serial Bus

Connector Pin Signal

1

2

3

4

+5V
Data ­Data +
Ground

Return to the top.

Modem

Connector Pin Signal

1

2

3

4

5

6

Unused

Unused

Tip

Ring

Unused

Unused

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Maintenance & Service Guide

Presario 1200 Series

Models: 1255, 1257, 1260, 1262, 1266, and 1267

| Home Page | Notice | Preface | Product Description | Troubleshooting

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Battery Pack Operating Time

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

● Increase battery pack operating time

● Conditioning a battery pack

● Disposal 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 steps:

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

2. Customize the timeout value to work more efficiently with the applications. The amount of battery life depends
on the values selected.

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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.

Return to the top of this page.

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 LED light on the display stops blinking.
Your battery gauge may read 100 percent for a period of time before LED light on the display stops
blinking. Do not unplug the AC adapter until the arrow disappears.

2. Unplug the AC adapter and allow the battery to drain until the computer reaches hibernation and turns
itself off. Do not plug in the AC adapter during this process or you will need to restart with Step
No. 1. You may use the computer while the battery is draining.

3. Your battery is re- conditioned.

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

The table below shows the approximate battery pack charge times.

Approximate Battery Charge Time

Computer On Line Off Line

NiMH Battery Pack 4.0 hours premature termination 2:00 hrs

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

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Disposal of a Used Battery Pack

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

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

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Maintenance & Service Guide

Presario 1200 Series

Models: 1255, 1257, 1260, 1262, 1266, and 1267

| Home Page | Notice | Preface | Product Description | Troubleshooting

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Models & Features

Models and
Features

Controls
and Lights

Left Side
Components

Right Side
Components

Bottom of
Unit

Rear
Connectors

Power
Management

Compaq Presario 1200 Series Portable Computer Models

Model 1255

Model 1257

Display

12. 1" HPA

12.1" HPA

Processor

AMD-K6 333-MHz MMX AMD-K6 266-MHz MMX

Hard Drive

3.2-GB (or) 4.0-GB

3.2-GB

CD Drive

24× MAX 24× MAX

Modem

K-56.0 (or) M++56.0
Kbps Data/Fax with ITU
V.90

M++56.0 Kbps Data/Fax with
ITU V.90

Battery

ES NiMH (or) sLi ion

ES NiMH

Model 1260

Model 1262

Display

12. 1" TFT 12. 1" TFT

Processor

AMD-K6 333-MHz MMX AMD-K6 333-MHz MMX

Hard Drive

4.0-GB (or) 6.4-GB 4.0-GB

CD Drive

24× MAX 24× MAX

Modem

K-56.0 (or) M++56.0
Kbps Data/Fax with ITU
V.90

K-56.0 Kbps Data/Fax
with ITU V.90

Battery

sLi ion ES NiMH

Model 1266 Model 1267

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Display

12. 1" TFT 12. 1" TFT

Processor

AMD-K6 333-MHz MMX AMD-K6 333-MHz MMX

Hard Drive

6.4-GB 4.0-GB

CD Drive

24× MAX 24× MAX

Modem

K-56.0 Kbps Data/Fax
with ITU V.90

K-56.0 Kbps Data/Fax
with ITU V.90

Battery

sLi ion ES NiMH

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Maintenance & Service Guide

Presario 1200 Series

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| Home Page | Notice | Preface | Product Description | Troubleshooting

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Controls and Lights

Models and
Features

Controls and
Lights

Left Side
Components

Right Side
Components

Bottom of
Unit

Rear
Connectors

Power
Management
for Windows
98

Front Panel
Components

1. Display

2. Power
Button

3.
Keyboard

4.
TouchPad

5.
Speakers
& Ports

6.
Palmrest

7. (L)
TouchPad
Button

8. (R)
TouchPad
Button

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9. Instant
Internet
Access
Button

10. Instant
Search
Button

11. Scroll
up/down
Button

12.Instant
E­Commerce
Button (or
favorite
website)

13. Instant
E-mail

14. Power
Light

15. Battery
Charge
Light

16. AC
Adapter
Light

17.
Headphone
Jack

18. Volume
Down
Button

19. Volume
Up Button

20.
Microphone
Jack

21.
Number
Lock Light

22. Cap
Lock Light

23. Scroll
Lock Light

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Compaq Home

Search

Products

Service

Worldwide

Compaq.com

Legal Notices and Privacy Statement

Revised: 25 February 1999

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STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US |

Maintenance & Service Guide

Presario 1200 Series

Models: 1255, 1257, 1260, 1262, 1266, and 1267

| Home Page | Notice | Preface | Product Description | Troubleshooting

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Left Side Components

Models and
Features

Controls and
Lights

Left Side
Components

Right Side
Components

Bottom of
Unit

Rear
Connectors

Power
Management
for Windows
98

1. PC
Card
Eject
Lever

2. PC
Card
Slot

3.
Diskette
Drive
Slot

4.
Diskette
Eject
Button

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Maintenance & Service Guide

Presario 1200 Series

Models: 1255, 1257, 1260, 1262, 1266, and 1267

| Home Page | Notice | Preface | Product Description | Troubleshooting

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Right Side Components

Models and
Features

Controls and
Lights

Left Side
Components

Right Side
Components

Bottom of
Unit

Rear
Connectors

Power
Management
for Windows
98

1. Battery
Compartment.

2. CD Drive.

3. CD Drive
Eject Button.

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Maintenance & Service Guide

Presario 1200 Series

Models: 1255, 1257, 1260, 1262, 1266, and 1267

| Home Page | Notice | Preface | Product Description | Troubleshooting

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Bottom of Unit

Models and
Features

Controls and
Lights

Left Side
Components

Right Side
Components

Bottom of
Unit

Rear
Connectors

Power
Management
for Windows
98

1.
Upgradeable
memory
compartment.

2. Rubber
feet.

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Maintenance & Service Guide

Presario 1200 Series

Models: 1255, 1257, 1260, 1262, 1266, and 1267

| Home Page | Notice | Preface | Product Description | Troubleshooting

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Rear Connectors

Models and
Features

Controls and
Lights

Left Side
Components

Right Side
Components

Bottom of
Unit

Rear
Connectors

Power
Management
for Windows
98

1. AC
Adapter.

2. Parallel
Printer
Port.

3. Serial
Port.

4. Fan
Exhaust.

5.
External
Monitor
Port.

6. USB.

7.
Keyboard/
Mouse
Port.

8. Modem
Jack.

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9.
Security
Slot.

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Maintenance & Service Guide

Presario 1200 Series

Models: 1255, 1257, 1260, 1262, 1266, and 1267

| 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

Sleep

Hibernation

Battery Operating Time

Rebooting After Lockup

Servicing Your Computer

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Maintenance & Service Guide

Presario 1200 Series

Models: 1255, 1257, 1260, 1262, 1266, and 1267

| 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:

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.

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

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

7. Ensure that the battery pack is inserted in the computer and the computer is
connected to an external AC power source.

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

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Return to Troubleshooting index page.

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Maintenance & Service Guide

Presario 1200 Series

Models: 1255, 1257, 1260, 1262, 1266, and 1267

| Home Page | Notice | Preface | Product Description | Troubleshooting

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

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.

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 battery pack.

4. Remove the Palmrest Cover with Touch Pad.

5. Remove the keyboard.

6. Remove the heatspreader.

7. Remove modem.

8. Remove RTC battery for 30 seconds and replace it .

9. Reassemble the computer.

10. Turn on the computer to verify that the power-on
password has been cleared. If it has not been cleared,
repeat Steps 1 through 10.

Return to preliminary steps page.

or

Return to Troubleshooting index page.

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Maintenance & Service Guide

Presario 1200 Series

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| 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 the following steps:

● Turn off the computer, then turn on the computer.

● If POST does not detect any errors, the computer will not beep. This indicates successful

completion of POST test. POST has run successfully and boots from the hard drive (or from
a bootable diskette if one is installed in the diskette drive).

● If POST detects errors, the errors are indicated by screen and/or audible messages. Refer

to "Power-On Self-Test (POST) Codes" in the tables for a list of POST codes and their
relevant descriptions.

NOTE:

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

Probable Cause Recommended Action

DMA, timers, etc. Replace the system board.

162-System Options Not Set

Probable Cause Recommended Action

Configuration incorrect Run Computer Setup.

CMOS reflects that an invalid

configuration has been set.

Run Computer Setup.

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RAM failure 1. Replace the memory modules.

2. Replace the system board.

Memory test data error 1. Replace the memory modules.

2. Replace the system board.

XX000YZZ RAM failure Replace the system board.

XX000YZZ 201-Memory Error

Probable Cause Recommended Action

RAM failure 1. Replace the memory modules.

2. Replace the system board.

Memory test data error 1. Replace the memory modules.

2. Replace the system board

XXOOOYZZ Ram failure 1. Replace the system board

301-Keyboard Error

Probable Cause Recommended Action

Keyboard failure 1. Ensure the keys are not depressed during

POST.

2. Reconnect the keyboard with the computer
off.

3. Replace the keyboard.

304-Keyboard or System Unit Error

Probable Cause Recommended Action

Keyboard or system board error 1. Replace the keyboard.

2. Replace the TouchPad or mouse.

3. Replace the system board.

601-Diskette Controller Error

Probable Cause Recommended Action

Mismatch in drive type or failure in the diskette
controller

1. Run Computer Checkup (TEST).

2. Check and/or replace cables.

3. Replace the system board.

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605-Diskette Drive Error

Probable Cause Recommended Action

Mismatch in drive type Run Computer Setup.

1780-Primary Hard Drive 0 Failure

Probable Cause Recommended Action

Disk 0 failed to respond 1. Run Computer Checkup (TEST).

2. Replace the hard drive.

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

2. Replace the hard drive.

1782-Hard Drive Controller

Probable Cause Recommended Action

Hard drive controller failure 1. Run Computer Setup.

2. Replace the hard drive.

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Compaq.com

United States

Maintenance & Service Guide

Presario 1200 Series

Models: 1255, 1257, 1260, 1262, 1266, and 1267

| 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.

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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:

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

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

■ Quick Check Diagnostics. Runs a quick, general test on each device with a minimal number of

prompts. If errors occur, they 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.

Return to top of this page

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.

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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.

Return to top of this page

or to Preliminary steps page.

or to the Troubleshooting index page.

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Maintenance & Service Guide

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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.

IMPORTANT:

Retest the system after completing each step. If the problem 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
200 through 215 Processor Test
300 through 304 Memory Test
401 through 403 Keyboard Test
600 through 699 Parallel Printer Test

1101 Diskette Drive Test

1701 through 1736 Serial Test

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501 through 516 Hard Drive Test
2402 through 2456 Video Test
2458 through 2480 Audio Test

3206 Touch Pad Pointing Device Test
8601 through 8602 CD Test
3301 through 6623

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.

2. Replace the system board and retest.

202-xx Memory system ROM checksum

failed

203-xx Write/Read test failed 1. Remove the memory module and

retest.

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2. Install a new 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

Return to the top

Keyboard Test Error Codes

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

disconnected, turn off the computer
and connect the keyboard.

2. Replace the keyboard and retest.

3. Replace the system board and retest.

301-xx Failed Selftest/Interface Test
302-xx Failed Individual Key Test
304-xx Failed Keyboard Repeat Test

Parallel Printer Test Error Codes

401-xx Printer failed or not connected 1. Connect the printer.

2. Check power to the printer.

3. Install the loop-back connector and
retest.

4. Check port and IRQ configuration.

5. Replace the system board and retest.

402-xx Failed Port Test

403-xx Printer pattern test failed

Return to the top.

Diskette Drive Test

600-xx

Diskette ID drive types test

failed

1. Replace the diskette media and
retest.

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

3. Replace the diskette drive and retest.

4. Replace the system board and retest.

601-xx Diskette format failed
602-xx Diskette read test failed

603-xx

Diskette write, read, compare test

failed

604-xx Diskette random read test failed
605-xx Diskette ID media failed
606-xx Diskette speed test failed
609-xx Diskette reset controller test failed
610-xx Diskette change line test failed
697-xx Diskette type error

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698-xx

Diskette drive speed not within

limits

699-xx

Diskette drive/media ID error 1. Replace media.

2. Run the Configuration and
Diagnostics Utilities.

Return to the top.

Serial Test Error Codes

1101-xx

Serial port test failed 1. Check port configuration

2. Replace the system board and retest.

Hard Drive Test Error Codes

1701-xx Hard drive format test failed 1. Run the Configuration and

Diagnostics 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.

1702-xx Hard drive read test failed
1703-xx

Hard drive write/read/compare

test failed
1704-xx Hard drive random seek test failed
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

Hard drive conditional format test

failed
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

Return to the top.

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Video Test Error Codes

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

xx through 516-xx:

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

2. Replace the display assembly and
retest.

3. Replace the system board and retest.

502-xx Video memory test failed
503-xx Video attribute test failed
504-xx Video character set test failed

505-xx

Video 80 × 25 mode 9 × 14

character cell test failed

506-xx

Video 80 × 25 mode 8 × 8

character cell test failed

507-xx Video 40 × 25 mode test failed
508-xx

Video 320 × 200 mode color set 0

test failed

509-xx

Video 320 × 200 mode color set 1

test failed

510-xx Video 640 × 200 mode test failed
511-xx

Video screen memory page test

failed

512-xx Video gray scale test failed
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

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.

2403-xx Video attribute test failed
2404-xx Video character set test failed

2405-xx

Video 80 × 25 mode 9 × 14

character cell test failed

2406-xx

Video 80 × 25 mode 8 × 8

character cell test failed

2408-xx

Video 320 × 200 mode color set 0

test failed

2409-xx

Video 320 × 200 mode color set 1

test failed

2410-xx Video 640 × 200 mode test failed
2411-xx

Video screen memory page test

failed
2412-xx Video gray scale test failed
2414-xx Video white screen test failed

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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.

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

3. Replace the display assembly and
retest.

4. Replace the system board and retest.

2421-xx ECG/VGC 640 × 200 graphics

mode test failed

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

test failed

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

test failed

2424-xx ECG/VGC monochrome text mode

test failed

2425-xx ECG/VGC monochrome graphics

mode test failed

2431-xx 640 × 480 graphics test failure

2432-xx 320 × 200 graphics (256 color

mode) test failure

2448-xx Advanced VGA Controller test failed

2451-xx 132-column Advanced VGA test

failed
2456-xx Advanced VGA 256 Color

test failed

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

codes 2458-xx through 2480-xx:

Replace the system board and retest.

2468-xx Advanced VGA DAC test

2477-xx Advanced VGA data path test

2478-xx Advanced VGA BitBLT test

2480-xx Advanced VGA LineDraw test

Return to the top.

Audio Test Error Codes

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

TouchPad/Pointing Device Interface Test Error Codes

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

2. Replace the system board and retest.

8602-xx Interface test failed

CD Drive Test Error Codes

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

2. Verify that the speakers are
connected.

3. Verify that drivers are loaded and
properly installed.

4. Replace the CD drive and retest.

5. Replace the system board and retest.

3305-xx 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

Return to the top.

or return to the Troubleshooting index page.

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COMPAQ

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Maintenance & Service Guide

Presario 1200 Series

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| Home Page | Notice | Preface | Product Description | Troubleshooting

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Troubleshooting Without Diagnostics

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

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

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

WARNING: To avoid a potential shock hazard during troubleshooting procedures, disconnect all power

sources before removing the keyboard cover or the display bezel.

Before Replacing Parts

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

■ Run Computer Setup after connecting external devices.

■ Verify that all required device drivers are installed.

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

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

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

Return to the Troubleshooting index page.

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| Home Page | Notice | Preface | Product Description | Troubleshooting

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Solving Minor Problems

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

Solving Audio Problems

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

Solving Audio Problems

Problem Probable Cause Solution(s)

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

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

No action is required.

Solving Battery Pack and Battery Gauge Problems

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

Solving Battery Pack and Battery Gauge Problems

Problem Probable Cause Solution(s)

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

Battery pack is discharged. Connect the computer to an external

power source and charge the battery
pack.

Replace the battery pack with a fully
charged battery pack.

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

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Computer is beeping and battery LED
icon is blinking.

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

Then do any one of the following:

● Connect the computer to an

external power source to
charge the battery pack.

● Turn off the computer or

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

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

Volume is turned down too low. Adjust the volume.

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

Battery pack is already charged. No action is necessary.

Battery pack was exposed to
temperature extremes.

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

Battery pack is at end of its life. Replace battery pack.

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

RTC battery is dead. Replace the RTC battery.

Problem Probable Cause Solution(s)

Battery charge does not last as
long as expected.

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

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

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

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

battery completely and then
recharge it.

Power management is disabled. Set a power management level in

Computer Setup.

An external device or PC Card is
draining the battery.

Turn off or disconnect external
devices when not using them.

Battery pack is warm to the touch
after charging.

Normal warming has occurred due to
charging.

No action is required.

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

Power management is turned off or
disabled.

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

An external device or PC Card is
draining the battery.

Turn off or disconnect external
devices when not using them.

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Battery pack has partially self­discharged.

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

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

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

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

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

Recharge the battery pack.

Solving CD Drive Problems

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

Solving CD Drive Problems

Problem Probable Cause Solution(s)

CD drive cannot read a compact disc. Compact disc is upside down or is

improperly inserted in the CD drive.

Open the CD loading tray, lay the
compact disc in it (label side up),
then close the tray.

CD is CD Plus or Pregap/Track 0
type.

Cannot read these type CDs in 24x.
Remove the CD.

Solving Diskette and Diskette Drive Problems

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

Solving Diskette and Diskette Drive Problems

Problem Probable Cause Solution(s)

Diskette drive cannot write to a
diskette.

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

feature or use a diskette that is not
write-protected.

Computer is writing to the wrong
drive.

Check the drive letter in the path
statement.

Not enough space is left on the
diskette.

Use another diskette.

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Drive error has occurred. Run Computer Checkup from the

Compaq Diagnostics diskette.

Diskette is not formatted. Format the diskette. At the system

prompt, enter

FORMAT A:

Diskette drive cannot read a diskette. The wrong type of diskette is being

used.

Use the type of diskette required by
the drive.

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

diskette. Reformat bad floppy.

Drive error has occurred. Run Computer Checkup from the

Compaq Diagnostics diskette.

Diskette is not
formatted.

Format the diskette. At the system
prompt, enter

FORMAT A:

Cannot boot from diskette. Bootable diskette is not in drive A. Put the bootable diskette in drive A.

Diskette Boot has incorrect setting
in Computer Setup.

Run Computer Setup and set diskette
as first to boot.

Solving Display Problems

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

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

1. Turn off the monitor.

2. Turn off the computer.

3. Disconnect the monitor signal cable from the computer.

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

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

Solving Display Problems

Problem Probable Cause Solution(s)

Screen is dim. Control for brightness or contrast (if

applicable) is not set properly.

Adjust the Brightness of the display
by using Fn + F7 or
Fn + F8.

Adjust the Contrast of the display by
using Fn + F5 or
Fn + F6.

Computer screen is in direct light. Tilt display or move computer.

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Screen is blank. Screen save was initiated by Power

Management due to lack of user
activity.

Press any key or touch the Touch Pad.

Display has overheated. If computer is in direct sunlight,

move it and allow it to cool off.

Display is blank and the Suspend icon
is flashing.

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

Internal display is blank and the
screen on an external monitor displays
information.

Display function was switched to the
external monitor.

Use Fn + F3 to switch between LCD
or CRT.

Problem Probable Cause Solution(s)

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

Using 1024 × 768 or higher
resolution on external
monitor and have toggled
back to internal display,
which supports up to
800 × 600.

Restart the computer.

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

Improper backlight or
display cable connections

Replace the display assembly.

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

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

Defective system board. Replace the system board.

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

Improper display cable
connections.

1. Reseat the display cable to the
system board.

2. Replace the display assembly.

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

Contrast cannot be adjusted with
Fn + F5 or Fn + F6.

Improper display cable
connections.

1. Reseat the display cable to the
system board.

2. Replace the display assembly.

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

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

Problem Probable Cause Solution(s)

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

Improper display cable
connections

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

1. System board

2. Display assembly

Defective display cable. Replace the display assembly.

Defective inverter board. Replace the display assembly.

Defective system board. Replace the system board.

Ghost bars extending from graphics on the
display.

Common characteristic of
STN displays.

1. Change the background colors.

2. Adjust the Contrast of the display
by using Fn + F5 or Fn + F6.

A single line, small group of lines, or block
appears on the display panel. This failure
occurs in only a section of the display panel.

Defective display panel. Replace the display assembly.

NOTE:

To perform a "self-test" on an external VGA color or monochrome monitor, complete the following steps:
The screen should be white. A narrow black border may also appear on the left and right sides of the
display. Either of these displays indicates that the monitor is working properly.

Solving Hard Drive Problems

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

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

all times, in case of errors or failures.

Solving Hard Drive Problems

Problem Probable Cause Solution(s)

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

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

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

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

failed.

Run Computer Checkup.

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

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

Solving Hardware Installation Problems

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

Solving Hardware Installation Problems

Problem Probable Cause Solutions(s)

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

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

Ensure that all cables are properly
and securely connected.

Power switch of new external device
is not turned on.

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

Device is not seated properly. Turn off the computer and reinsert

the device.

Solving Keyboard/Numeric Keypad Problems

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

Solving Keyboard/Numeric Keypad Problems

Problem Probable Cause Solution(s)

Embedded numeric keypad on computer
keyboard is disabled.

Num Lock function is not enabled. Press the Shift+NumLk keys to

enable the Num Lock function and
embedded numeric keypad. The
Num Lock icon on the status panel
turns on.

Embedded numeric keypad is disabled and
Num Lock function is on.

External numeric keypad is
connected to the computer.

Disconnect the external numeric
keypad from the computer.

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Solving Memory Problems

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

Solving Memory Problems

Problem Probable Cause Solution(s)

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

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

Ensure that the optional memory
expansion card is installed
correctly.

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

System ran out of memory for the
application.

Check the application
documentation for memory
requirements.

Install additional memory.

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

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

Solving Minor Problems (continued)

or return to the Troubleshooting index page.

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Maintenance & Service Guide

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| 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.

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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 Compaq Diagnostics page or Troubleshooting Index page.

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System Unit

Place cursor over each device to attain its part number.

System Unit

Boards
Display

Assembly
Mass Storage

Devices
Miscellaneous

Cable Kit
Cables
Miscellaneous

Hardware and
Plastics Kit

Miscellaneous
Parts

Documentation
and Software

US 102250-001

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Battery Packs:

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COMPAQ

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Maintenance & Service Guide

Presario 1200 Series

Models: 1255, 1257, 1260, 1262, 1266, and 1267

| Home Page | Notice | Preface | Product Description | Troubleshooting

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Boards

System Unit

Boards

Display
Assembly

Mass Storage
Devices

Miscellaneous
Cable Kit

Cables
Miscellaneous

Hardware and
Plastics Kit

Miscellaneous
Parts

Documentation
and Software

Place cursor over each device to attain its part number.

Modem, K-56.0 Kbps Data/Fax w/o SRAM (US, Canada, Latin America) 138659-001

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Maintenance & Service Guide

Presario 1200 Series

Models: 1255, 1257, 1260, 1262, 1266, and 1267

| Home Page | Notice | Preface | Product Description | Troubleshooting

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Display Assembly

System Unit
Boards

Display
Assembly

Mass Storage
Devices

Miscellaneous
Cable Kit

Cables
Miscellaneous

Hardware and
Plastics Kit

Miscellaneous
Parts

Documentation
and Software

Display Panel Assembly:

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Compaq.com

United States

Maintenance & Service Guide

Presario 1200 Series

Models: 1255, 1257, 1260, 1262, 1266, and 1267

| Home Page | Notice | Preface | Product Description | Troubleshooting

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Mass Storage Devices

System Unit
Boards
Display

Assembly

Mass Storage
Devices

Miscellaneous
Cable Kit

Cables
Miscellaneous

Hardware and
Plastics Kit

Miscellaneous
Parts

Documentation
and Software

Place cursor over each device to attain its part number.

1.800.AT.COMPAQ

Hard Drives w/Mounting Brackets

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Maintenance & Service Guide

Presario 1200 Series

Models: 1255, 1257, 1260, 1262, 1266, and 1267

| Home Page | Notice | Preface | Product Description | Troubleshooting

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Miscellaneous Cables Kit

System Unit
Boards
Display

Assembly
Mass Storage

Devices

Miscellaneous
Cable Kit

Cables
Miscellaneous

Hardware and
Plastics Kit

Miscellaneous
Parts

Documentation
and Software

Place cursor over each device for a description
of that item.

Spare Part Number: 330946-001

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Maintenance & Service Guide

Presario 1200 Series

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| Home Page | Notice | Preface | Product Description | Troubleshooting

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Cables

System Unit
Boards
Display

Assembly
Mass Storage

Devices
Miscellaneous

Cable Kit

Cables

Miscellaneous
Hardware and
Plastics Kit

Miscellaneous
Parts

Documentation
and Software

Description Spare Part Number

Power Cord

Description Spare Part Number

Modem Cables

US/French Canada 293831-001

Asia Pacific w/adapter 137256-001

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Maintenance & Service Guide

Presario 1200 Series

Models: 1255, 1257, 1260, 1262, 1266, and 1267

| Home Page | Notice | Preface | Product Description | Troubleshooting

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Miscellaneous Hardware and Plastics Kit

System Unit
Boards
Display

Assembly
Mass Storage

Devices
Miscellaneous

Cable Kit
Cables

Miscellaneous
Hardware and
Plastics Kit

Miscellaneous
Parts

Documentation
and Software

Miscellaneous Hardware and Plastics Kit

Hardware Spare Part Number: 346853-

001

Plastics Kit Spare Part Number:

330949-001

Description Quantity

1. Door, Battery Pack 1 each

2. Cover, Memory Module 1 each

3. Door, PCMCIA 2 each

4. Hinge (Clutch) Cover, Left 1 each

5. Hinge (Clutch) Cover, Right 1 each

6. Rubber Foot 10 each

7. Hard Drive Mounting Bracket 1 each

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Maintenance & Service Guide

Presario 1200 Series

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| Home Page | Notice | Preface | Product Description | Troubleshooting

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Miscellaneous Parts

System Unit
Boards
Display

Assembly
Mass Storage

Devices
Miscellaneous

Cable Kit
Cables
Miscellaneous

Hardware and
Plastics Kit

Miscellaneous
Parts

Documentation
and Software

Use the scroll down menu for the description and spare part number of
spare parts Not Shown.

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Miscellaneous Screw Kit (Not Shown) 330959-001

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Maintenance & Service Guide

Presario 1200 Series

Models: 1255, 1257, 1260, 1262, 1266, and 1267

| Home Page | Notice | Preface | Product Description | Troubleshooting

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Documentation and Software

System Unit
Boards
Display

Assembly
Mass Storage

Devices
Miscellaneous

Cable Kit
Cables
Miscellaneous

Hardware and
Plastics Kit

Miscellaneous
Parts

Documentation
and Software

Description Spare Part

Number

Quick Restore CD

Australia
China (PRC)

388205-371

388205-AA1

Quick Reference Guide (single issue)
Quick Reference Guide (quarterly subscription)

162212-001
184960-001

QuickFind for Windows*, Asia Pacific Edition

137906-xxx

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

QuickFind Part Number Suffix

Suffix Month Suffix Month

-001 January -007 July

-002 February -008 August

-003 March -009 September

-004 April -010 October

-005 May -011 November

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-006 June -012 December

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Maintenance & Service Guide

Presario 1200 Series

Models: 1255, 1257, 1260, 1262, 1266, and 1267

| Home Page | Notice | Preface | Product Description | Troubleshooting

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Electrostatic Discharge

A sudden discharge of static electricity from a finger or other conductor can

destroy static-sensitive devices or microcircuitry.

● Often the spark is neither felt nor heard, but damage occurs. An electronic

device exposed to an electrostatic discharge (ESD) may not be affected at
all and will work perfectly throughout a normal cycle. Although it may
function normally for a while, it is possible for the exposed device's
internal layers to degrade, reducing its life expectancy considerably.

● Networks built into multiple integrated circuits provide some protection,

but in many cases, the discharge can contain enough power to alter device
parameters and melt silicon junctions.

Generating Static

This table shows the different electrostatic voltage levels generated by various

activities .

NOTE: 700 volts can degrade a product.

Typical Electrostatic Voltages

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Event

Relative Humidity

10% 40% 55%

Walking across carpet 35,000 V 15,000 V 7,500 V
Walking across vinyl floor 12,000 V 5,000 V 3,000 V
Motions of bench worker 6,000 V 800 V 400 V
Removing DIPS from plastic

tubes

2,000 V 700 V 400 V

Removing DIPS from vinyl trays 11,500 V 4,000 V 2,000 V
Removing DIPS from Styrofoam 14,500 V 5,000 V 3,500 V
Removing bubble pack from

PCBs

26,000 V 20,000 V 7,000 V

Packing PCBs in foam-lined box 21,000 V 11,000 V 5,000 V

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Maintenance & Service Guide

Presario 1200 Series

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| Home Page | Notice | Preface | Product Description | Troubleshooting

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Service Considerations

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

Tool and Software Requirements

To service the computer, you need the following:

● Compaq screwdriver kit (Spare Part No. 161946-001)

● Torx T-9 screwdriver

● 3/16-inch and 5mm nut drivers (for screwlocks and standoffs)

● Small, standard screwdriver

● Small, Phillips screwdriver

● Diagnostics software

Screws

The screws used in the computer are not interchangeable. If an incorrect screw is used
during the reassembly process it can damage the unit.

Compaq strongly recommends that each screw removed during disassembly be kept with
the part from which it was removed, then returned to the original location.

IMPORTANT:

As each subassembly is removed from the computer they should be
placed away from the work area to prevent damage.

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Maintenance & Service Guide

Presario 1200 Series

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| Home Page | Notice | Preface | Product Description | Troubleshooting

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Cables and Connectors

Most cables used throughout the units are ribbon cables; they must be handled with extreme care to

avoid damage.

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

● Apply only the required tension to seat or unseat the cables during insertion and removal from the connector.

● Handle cables by the connector whenever possible.

● In all cases, avoid bending, twisting, or tearing the cables, and ensure that the cables are routed in such a way

that they cannot be caught or snagged by parts being removed or replaced.

Handle flex cables with extreme

care; they can tear easily.

CAUTION: When servicing these computers, ensure that cables are placed in their proper location

during the reassembly process. Improper cable placement can cause severe damage to the unit.

Select the desired illustration.

● Removing a Cable from a ZIF Connector.

● The ribbon cable position for the 3.2-GB, 4.0-GB, and 6.4-GB hard drive.

● The ribbon cable position for the CD drive.

● The ribbon cable position for the diskette drive.

● The cable position for the speaker assembly.

Plastic Parts

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

Return to Removal & Replacement Procedures

Compaq Home

Search

Products

Service

Worldwide

Compaq.com

Legal Notices and Privacy Statement

Revised: 25 February 1999

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Maintenance & Service Guide

Presario 1200 Series

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| Home Page | Notice | Preface | Product Description | Troubleshooting

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Preparing the Computer for Disassembly

Electrostatic
Discharge

Service
Considerations

Cables and
Connectors

Preparing the
Computer for
Disassembly

Battery Pack
Palmrest

Cover with
Touch Pad

Heatspreader
Keyboard
Processor
Hard Drives
CD Drive
Battery

Charger Board
Modem
Display Panel

Assembly
Upper CPU

Cover
Speaker

Assembly
Diskette Drive
Fan Assembly
System Board

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

1. Disconnect AC power and any external devices.

2. Remove the battery pack.

3. Remove any PC Cards.

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

the battery compartment. To prevent damage, do not allow metal objects to touch the
battery contacts. Place only the battery pack for the Compaq Presario 1200 Series
Portable Computers into the battery compartment. Do not force the battery pack into the
bay if insertion does not occur easily.

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

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

NOTE:

The Compaq Presario 1200 Series Portable Computers have several screws of various
sizes which are not interchangeable. Care must be taken during reassembly to ensure
that the correct screws are used in their correct location. During removal please keep
respective screws with their associated sub-assembly.

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Dip Switch
Settings

Memory
Module

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Maintenance & Service Guide

Presario 1200 Series

Models: 1255, 1257, 1260, 1262, 1266, and 1267

| Home Page | Notice | Preface | Product Description | Troubleshooting

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Removing the Battery Pack

Electrostatic
Discharge

Service
Considerations

Cables and
Connectors

Preparing the
Computer for
Disassembly

Battery Pack

Palmrest
Cover with
Touch Pad

Heatspreader
Keyboard
Processor
Hard Drives
CD Drive
Battery

Charger Board
Modem

To remove
the battery
pack,
complete
the
following
steps:

1. Slide the
battery pack
compartment
door down
and remove
it from the
battery pack.

Next Step

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Display Panel
Assembly

Upper CPU
Cover

Speaker
Assembly

Diskette Drive
Fan Assembly
System Board

Dip Switch
Settings

Memory
Module

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Maintenance & Service Guide

Presario 1200 Series

Models: 1255, 1257, 1260, 1262, 1266, and 1267

| Home Page | Notice | Preface | Product Description | Troubleshooting

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Removing the Palmrest Cover with Touch Pad

Electrostatic
Discharge

Service
Considerations

Cables and
Connectors

Preparing the
Computer for
Disassembly

Battery Pack

Palmrest
Cover with
Touch Pad

Heatspreader
Keyboard
Processor
Hard Drives
CD Drive
Battery

Charger Board
Modem
Display Panel

Assembly
Upper CPU

Cover

The palmrest cover
with touch pad must
be removed to gain
access to any of the
interior components
of the computer,
and it is the first
component that has
to be removed to
gain access to the
interior components.

NOTE:

It is not
necessary
to remove
the display
panel
assembly to
access the
interior
components
of the
computer.

To remove the
palmrest cover with
touch pad, complete
the following steps:

1. Prepare the

computer for
disassembly.

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Speaker
Assembly

Diskette Drive
Fan Assembly
System Board

Dip Switch
Settings

Memory
Module

2. Close the
computer and turn
the computer upside
down.

3. Remove four
screws from the
bottom of the
computer.

Next Step

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Maintenance & Service Guide

Presario 1200 Series

Models: 1255, 1257, 1260, 1262, 1266, and 1267

| Home Page | Notice | Preface | Product Description | Troubleshooting

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Removing the Heatspreader

Electrostatic
Discharge

Service
Considerations

Cables and
Connectors

Preparing the
Computer for
Disassembly

Battery Pack
Palmrest

Cover with
Touch Pad

Heatspreader

Keyboard
Processor
Hard Drives
CD Drive
Battery

Charger Board
Modem

To remove
the
heatspreader,
complete the
following
steps:

1. Prepare

the computer
for
disassembly.

2. Remove
the

palmrest
cover with
touch pad.

3. Remove

Keyboard.

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

To replace

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Display Panel
Assembly

Upper CPU
Cover

Speaker
Assembly

Diskette Drive
Fan Assembly
System Board

Dip Switch
Settings

Memory
Module

the
heatspeader,
reverse the
previous
procedures.

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Maintenance & Service Guide

Presario 1200 Series

Models: 1255, 1257, 1260, 1262, 1266, and 1267

| Home Page | Notice | Preface | Product Description | Troubleshooting

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Removing the Keyboard

Electrostatic
Discharge

Service
Considerations

Cables and
Connectors

Preparing the
Computer for
Disassembly

Battery Pack
Palmrest

Cover with
Touch Pad

Heatspreader

Keyboard

Processor
Hard Drives
CD Drive

To remove
the keyboard,
complete the
following
steps:

1. Prepare

the computer
for
disassembly.

2. Remove
the palmrest

cover with
touch pad.

3. Turn the
keyboard
over allowing
it to rest on
top of the
palmrest
cover with
touchpad slot
opening. .

4. Remove
the

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Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1255, 1257, 1260, 1262, 1266, and 1267

Battery
Charger Board

Modem
Display Panel

Assembly
Upper CPU

Cover
Speaker

Assembly
Diskette Drive
Fan Assembly
System Board

Dip Switch
Settings

Memory
Module

heatspreader .

5. Disconnect
the flex cable
from the ZIF
connector on
the system
board.

6. Disconnect
the flex cable
from the ZIF
connector on
the system
board.

To replace
the keyboard,
reverse the
previous
procedures.

Return to
Removal &
Replacement
Procedures

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Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1255, 1257, 1260, 1262, 1266, and 1267

United States June 27, 104

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Maintenance & Service Guide

Presario 1200 Series

Models: 1255, 1257, 1260, 1262, 1266, and 1267

| Home Page | Notice | Preface | Product Description | Troubleshooting

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Removing the Processor

Electrostatic
Discharge

Service
Consideration

Cables and
Connectors

Preparing
the
Computer
for
Disassembly

Battery Pack
Palmrest

Cover with
Touch Pad

Heatspreader
Keyboard

Processor

Hard Drives
CD Drive

To remove
the
processor,
complete the
following
steps:

1. Prepare

the
computer for
disassembly.

2. Remove

palmrest
cover with
touchpad.

3. Remove
the

heatspreader.

4. Remove
the keyboard.

5. Insert a

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