Compaq prosignia schematic

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.

COMPAQ, ARMADA, LTE, and PROSIGNIA are registered in the U.S. Patent and Trademark Office.

Microsoft, MS-DOS, and Windows are registered trademarks 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

Prosignia Notebook Family of Personal Computers

First Edition October, 1998 Documentation Part Number 382712-001 Spare Part Number 382793-001

Compaq Computer Corporation

preface

USING THIS GUIDE

Symbols................................................................................................................................................vii

Technician Notes................................................................................................................................ viii

Serial Number .................................................................................................................................... viii

Laser Safety ................................................................................................................................... viii

CDRH Regulations ........................................................................................................................ viii

Battery Notice ...................................................................................................................................ix

Serial Number ....................................................................................................................................x

Locating Additional Information ...........................................................................................................x

chapter 1

PRODUCT DESCRIPTION

1.1 Computer Features and Models .................................................................................................. 1-1

1.1.1 Features ................................................................................................................................. 1-2

1.1.2 Models................................................................................................................................... 1-2

1.1.3 Software Fulfillment ............................................................................................................. 1-3

1.2 Computer Options ....................................................................................................................... 1-3

1.2.1 Convenience Base II ............................................................................................................. 1-3

1.2.2 System Memory Options ...................................................................................................... 1-3

1.2.3 External Battery Charger ...................................................................................................... 1-4

1.2.4 External Keyboards and Pointing Devices ........................................................................... 1-4

1.2.5 External Monitors ................................................................................................................. 1-4

1.3 External Computer Components................................................................................................. 1-4

1.3.1 Left Side Components........................................................................................................... 1-5

1.3.2 Front Components................................................................................................................. 1-6

1.3.3 Top Components................................................................................................................... 1-7

1.3.4 Right Side Components ........................................................................................................ 1-8

1.3.5 Rear Components.................................................................................................................. 1-9

1.3.6 Bottom Components ........................................................................................................... 1-10

1.3.7 Status Panel Lights.............................................................................................................. 1-11

1.4 Design Overview....................................................................................................................... 1-12

1.4.1 System Unit......................................................................................................................... 1-12

1.4.2 Internal Boards.................................................................................................................... 1-12

1.4.3 Video system....................................................................................................................... 1-13

Contents iii

chapter 2

TROUBLESHOOTING

2.1 Preliminary Steps.........................................................................................................................2-2

2.2 Clearing Passwords......................................................................................................................2-3

2.3 Power-On Self-Test (POST) ........................................................................................................2-3

2.4 POST Error Messages..................................................................................................................2-4

2.5 Compaq Utilities ..........................................................................................................................2-7

2.5.1 Computer Setup .....................................................................................................................2-7

2.5.2 Computer Checkup (TEST) ...................................................................................................2-9

2.5.3 Running View System Information (INSPECT) .................................................................2-14

2.5.4 Running Compaq Diagnostics .............................................................................................2-15

2.5.5 Boot Sequencing ..................................................................................................................2-15

2.5.6 Factory Default Settings ......................................................................................................2-16

2.6 Troubleshooting Without Diagnostics .......................................................................................2-17

2.6.1 Before Replacing Parts ........................................................................................................2-17

2.6.2 Checklist for Solving Problems...........................................................................................2-17

chapter 3

ILLUSTRATED PARTS CATALOG

3.1 System Unit..................................................................................................................................3-2

3.2 Mass Storage Devices ..................................................................................................................3-4

3.3 Cables and Power Cords ..............................................................................................................3-6

3.4 Standard and Optional Boards .....................................................................................................3-7

3.5 Options.........................................................................................................................................3-9

3.6 Miscellaneous Parts ...................................................................................................................3-10

3.7 Documentation...........................................................................................................................3-11

iv Contents

chapter 4

REMOVAL AND REPLACEMENT PRELIMINARIES

4.1 Tools Required.............................................................................................................................4-1

4.2 Service Considerations.................................................................................................................4-1

4.2.1 Plastic Parts............................................................................................................................4-1

4.2.2 Cables and Connectors...........................................................................................................4-2

4.3 Preventing Damage to Removable Drives...................................................................................4-2

4.4 Preventing Electrostatic Damage.................................................................................................4-3

4.4.1 Packaging and Transporting Precautions...............................................................................4-3

4.4.2 Workstation Precautions........................................................................................................4-4

4.4.3 Grounding Equipment and Methods......................................................................................4-4

4.4.4 Electrostatic Voltage Levels and Protective Materials..........................................................4-5

chapter 5

REMOVAL AND REPLACEMENT PROCEDURES

5.1 Serial Number .............................................................................................................................. 5-1

5.2 Disassembly Sequence................................................................................................................. 5-2

5.3 Preparing the Computer for Disassembly .................................................................................... 5-3

5.3.1 Disconnecting the AC Power................................................................................................5-3

5.3.2 Battery Pack Removal........................................................................................................... 5-4

5.3.3 MultiBay Devices ................................................................................................................. 5-5

5.3.4 PCMCIA ............................................................................................................................... 5-6

5.4 Computer Tilt Feet ....................................................................................................................... 5-7

5.5 Internal Modem............................................................................................................................ 5-8

5.5.1 IR (Infrared) Module .......................................................................................................... 5-10

5.6 Hard Drive.................................................................................................................................. 5-11

5.7 Keyboard .................................................................................................................................... 5-14

5.7.1 Keyboard Removal ............................................................................................................. 5-16

5.7.2 Memory Board .................................................................................................................... 5-17

5.7.3 Lithium Real Time Clock Battery ...................................................................................... 5-20

5.7.4 Optical Disc Bay ................................................................................................................. 5-22

5.8 Display Assembly ...................................................................................................................... 5-23

5.8.1 Hinge Covers ...................................................................................................................... 5-23

5.8.2 Display Assembly ............................................................................................................... 5-25

5.9 Top Cover Assembly.................................................................................................................. 5-27

5.9.1 DC-DC Converter and Audio Board Shield ....................................................................... 5-31

5.9.2 DC-DC Converter ............................................................................................................... 5-32

5.9.3 Audio Board........................................................................................................................ 5-33

5.9.4 Fan....................................................................................................................................... 5-34

5.9.5 System Board ...................................................................................................................... 5-35

5.9.6 Integrated AC Adapter........................................................................................................ 5-38

chapter 6

SPECIFICATIONS

6.1 Computer...................................................................................................................................... 6-2

6.2 Display ......................................................................................................................................... 6-3

6.3 Hard Drive.................................................................................................................................... 6-4

6.4 Diskette Drive .............................................................................................................................. 6-5

6.5 LS-120 Drive................................................................................................................................ 6-6

6.6 ZIP Drive...................................................................................................................................... 6-7

6.7 CD-ROM Drive............................................................................................................................ 6-8

6.8 DVD-ROM Drive......................................................................................................................... 6-9

6.9 Battery Packs.............................................................................................................................. 6-10

6.10 Convenience Base II ................................................................................................................ 6-11

6.11 External Power Supplies .......................................................................................................... 6-12

6.12 System Interrupts ..................................................................................................................... 6-14

6.13 System DMA............................................................................................................................ 6-14

6.14 System I/O Address ................................................................................................................. 6-15

6.15 System Memory Map............................................................................................................... 6-17

Contents v

Appendix A

CONNECTORS.........................................................................................................................................A-1

Appendix B

POWER CORD SET REQUIREMENTS

B.1 3-Conductor Power Cord Set ......................................................................................................B-1

B.1.1 General Requirements..........................................................................................................B-1

B.1.2 Country-Specific Requirements........................................................................................... B-2

B.1.3 Notes: ...................................................................................................................................B-2

Appendix C

CONVENIENCE BASE

C.1 Models and Features....................................................................................................................C-1

C.2 Convenience Base Features......................................................................................................... C-3

C.3 Convenience Base II Components ..............................................................................................C-4

C.3.1 Front and Right Side Components .......................................................................................C-4

C.3.2 Rear Components ................................................................................................................. C-5

INDEX ........................................................................................................................................................ I-1

vi Contents

reface

USING THIS GUIDE

This Maintenance and Service Guide is a troubleshooting guide that can be used for reference when servicing the Compaq Prosignia Notebook Family of Personal Computers.

Compaq Computer Corporation reserves the right to make changes to this product without notice.

Additional information is available on the Compaq Prosignia Notebook Family of Personal Computers Illustrated Parts Map.

Symbols

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

WARNING:

the warning could result in bodily harm or loss of life.

CAUTION: Text set off in this manner indicates that failure to follow directions in

the caution could result in damage to equipment or loss of information.

IMPORTANT: NOTE:

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 information.

Text set off in this manner indicates that failure to follow directions in

Using This Guide vii

Technician Notes

WARNING:

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, no one should attempt to make repairs at the component level or to make modifications to any printed wiring board. Improper repairs can create a safety hazard. Any indication of component replacement or printed wiring board modifications may void any warranty or exchange allowances.

WARNING:

proper operation, plug the AC power cord into a properly grounded electrical outlet only.

CAUTION:

(7.62 cm) of clearance on the left and right sides of the computer.

Only authorized technicians trained by Compaq should attempt to

The computer is designed to be electrically grounded. To ensure

To properly ventilate your system, you must provide at least 3 inches

Serial Number

When requesting information or ordering spare parts, provide the computer serial number. The serial number is on the back of the computer.

Laser Safety

All Compaq systems equipped with CD-ROM drives comply with appropriate safety standards, including IEC 825. With specific regard to the laser, the equipment complies with laser product performance standards set by government agencies as a Class 1 laser product. It does not emit hazardous light; the beam is totally enclosed during all modes of customer operation and maintenance.

CDRH Regulations

The Center for Devices and Radiological Health (CDRH) of the U.S. Food and Drug Administration implemented regulations for laser products on August 2, 1976. These regulations apply to laser products manufactured from August 1, 1976. Compliance is mandatory for products marketed in the United States.

viii Using This Guide

WARNING: Use of controls or adjustments or performance of procedures other

than those specified herein or in the CD ROM installation guide may result in hazardous radiation exposure.

This system is classified as a CLASS 1 LASER PRODUCT. This label is located on the outside of the system being serviced. A similar label also appears on the internal CDROM installed in the system.

LASER INFO Laser Type: Semiconductor GaAIAs

Wave Length: 780 +/- 35 nm Divergence Angle: 53.5 Degree +/- 1.5 Degree Output Power: Less than 0.2mW or 10,869 W Polarization: Circular Numerical Aperture: 0.45 +/- 0.04

Only an authorized technician, service provider, dealer, or reseller should attempt to 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, no one should attempt to make repairs at the component level or to make modifications to any printed wiring board. Improper repairs can create a safety hazard as well as void the warranty.

•m

-2sr-1

Battery Notice

In North America, dispose of nickel metal hydride or lithium-ion batteries by taking advantage of the Compaq battery recycling program. You will be provided with a postage-paid battery pack mailer preaddressed to a reclamation facility where the metals are recycled.

WARNING: This computer contains an internal lithium battery-powered real-time

clock circuit. There is a risk of explosion and injury if the battery is incorrectly replaced or improperly handled. Do not attempt to recharge, disassemble, immerse in water, or dispose of the battery in fire. Replacement should be done using the Compaq spare part for this computer.

WARNING: The computer also contains a lithium-ion battery pack. There is a risk

of fire and chemical burn if the battery pack is handled improperly. Do not disassemble, crush, puncture, short external contacts, dispose of in fire or water, or expose this battery to temperatures higher than 60 degrees C.

In Europe, do not dispose of batteries and accumulators with general household waste. Dispose of or recycle them by using the public collection system or returning them to Compaq.

Using This Guide ix

Serial Number

The serial number is located on the back of the computer directly below the parallel connector.

Locating Additional Information

The following documentation is available to support the computer:

■ Compaq Prosignia Notebook Family of Personal Computers documentation set

■ Microsoft operating system guide

■ Compaq service advisories and bulletins

■ Compaq QuickFind

■ Compaq Service Quick Reference Guide

■ Technical Reference Guide

■ Illustrated Parts Map

■ Compaq Internet site at http://www.Compaq.com

x Using This Guide

chapte

PRODUCT DESCRIPTION

1.1 Computer Features and Models

The Prosignia Notebook Family of Personal Computers is a line of multimedia notebook computers with advanced modularity, processors, and video graphics. This full-function, Mobile Pentium II-based family of notebook computers allows full desktop functionality and connectivity through the use of an optional Convenience Base.

Figure 1-1. Prosignia Notebook Personal Computer

Product Description 1-1

1.1.1 Features

The computer models have the following standard features:

■ 233-MHz, 266-MHz, or 300-MHz Mobile Pentium II processors

■ 32-MB or 64-MB of synchronous dynamic random access memory (SDRAM),

expandable to 160 MB (depending on the model)

■ 3.2-, 4.0-, or 6.0-GB, 2.5-inch internal hard drive mounted in carrier

■ LCD displays: ❏ 12.1 inch SVGA CTFT display ❏ 13.3-inch XGA CTFT display ❏ 14.1-inch XGA CTFT display

■ Supports Lithium Ion (Li-ion) battery packs

■ Internal stereo speakers

■ Internal microphone

■ 1.44-MB diskette drive, DVD, LS-120, Iomega Zip or second battery or Hard Disk

Drive in the Multi-bay adapter

■ DVD drive or 24X CD-ROM in the Optical Disk Bay

■ Full-size 101 key compatible keyboard including 12 function keys, 8 cursor control

keys, inverted-T cursor control keys, and embedded numeric keypad

■ Four user-programmable keys

■ Touchpad pointing device

■ Operates from a battery pack in the battery bay, plus an optional battery pack in the

MultiBay, or integrated AC power supply that is compatible with domestic or international power sources

■ Power management and security features

■ Infrared interface for wireless communication with other IrDA-compliant devices at

data rates up to 4 mb/sec

■ Two standard device slots that will accommodate two Type II or one Type III PC

Card, PCMCIA card or CardBus card. Zoomed-Video is supported in the bottom slot.

■ 176-pin expansion connector provides the interface to the convenience base options

■ Rear-panel ports provide connections for parallel, serial, external monitor, and

keyboard/mouse

■ Universal Serial Bus (USB)

(available on selected models)

1.1.2 Models

Compaq Prosignia Notebook computers are configurable, and may contain any or all of the features listed. All models have 32-MB or 64-MB of standard memory with one 32-MB memory module in the memory expansion port, and may be upgraded to 160MB.

Windows 95 supports up to 115-kb/sec. Driver for 4 mb/sec available from www.microsoft.com.

1-2 Product Description

1.1.3 Software Fulfillment

Replacement software may be ordered directly from Compaq Computer Corporation. Both the model and the serial number of the computer are needed to identify the specific software available.

1.2 Computer Options

The computer supports the following options:

■ Convenience Base II pass through model with monitor stand

■ Convenience Base II with Ethernet with monitor stand

■ Compatible with Convenience Base models from the Armada 1500 Family of

Personal Computers

■ Memory expansion boards

■ Li-ion battery pack

■ Automobile/Aircraft Adapter

■ External Battery Charger

■ PCMCIA modem

■ Hard drive upgrade

■ Hard drive adapter for MultiBay with carrying case

■ Internal modem

■ CD-ROM drive for Optical Disc Bay

■ DVD-ROM for Optical Disc Bay

■ 120-MB LS-120 diskette drive for MultiBay

■ 100-MB Zip drive for MultiBay

1.2.1 Convenience Base II

Prosignia Notebook models support the following convenience base models:

■ Convenience Base II pass through

■ Convenience Base II with Ethernet

1.2.2 System Memory Options

The computer supports optional 32-, 64-, and 128-MB memory boards. The memory boards are 66-MHz SDRAM without parity. System memory can be expanded to 160-MB, depending on the model.

Product Description 1-3

1.2.3 External Battery Charger

The external battery charger has the following features:

■ Two battery charge slots

■ Accepts Li-ion modular batteries

■ Charges 1 battery in 1.5 hours

■ Charges 2 batteries in 3 hours

Note: The battery calibration process should be used to discharge the batteries.

1.2.4 External Keyboards and Pointing Devices

Supports Compaq or Compaq compatible PS2 keyboards and pointing devices.

1.2.5 External Monitors

■ Supports all VGA Monitors at resolutions up to 1280 × 1024

■ Supports DDC1 and DDC2b compliant Energy Star monitors

1.3 External Computer Components

The external computer components are illustrated and described in this section.

1-4 Product Description

1.3.1 Left Side Components

The left side external components are shown in Figure 1-2 and are described in Table 1-

Figure 1-2. Left Side Components

Table 1-1

Computer Components

Left Side

Item Component Function

1 Cable Lock Secures computer to fixed object 2 Speaker/headphone jack Connects stereo speakers, headphone or headset 3 Microphone jack Connects external microphone, disables internal microphone 4 Volume up Increases volume 5 Volume down Decreases volume 6 Left bass reflex speaker port Enhances audio quality

Product Description 1-5

1.3.2 Front Components

The front external components are shown in Figure 1-3 and are described in Table 1-2.

Figure 1-3. Front Components

Table 1-2

Computer Components

Front

Item Component Function

1 Display LCD graphic display 2 Lid switch Blanks display when display is closed 3 Speakers Produce high quality stereo sound 4 MultiBay Accepts diskette drive, LS-120 drive, ZIP drive, second battery

5 Optical disc bay Accepts CD-ROM or DVD-ROM drives 6 Battery bay Accepts Li-Ion battery pack 7 Keyboard Accepts operator input 8 Microphone Monophonic microphone

pack or second hard drive

1-6 Product Description

1.3.3 Top Components

The top external components are shown in Figure 1-4 and are described in Table 1-3.

Figure 1-4. Top Components

Table 1-3

Computer Components

Top

Item Component Function

1 Lid switch Blanks display when display is closed 2 Programmable function buttons User programmable keys 3 Suspend button Initiates suspend 4 Power switch Turns power on and off 5 Keyboard release latches Releases keyboard from system unit 6 Touchpad Pointing device

Product Description 1-7

1.3.4 Right Side Components

The right side external components are shown in Figure 1-5 and are described in Table 1-4.

Figure 1-5. Right Side Components

Table 1-4

Computer Components

Right Side

Item Component Function

1 Right bass reflex speaker port Enhances audio quality 2 PC Card eject button Eject PC Cards from the slots 3 PC Card slots Accepts 16- and 32-bit PC Cards 4 USB Connector Connects USB devices to the computer 5 Modem jack Connects the phone line to the computer (selected models)

1-8 Product Description

1.3.5 Rear Components

The rear components are shown Figure 1-6 and are described in Table 1-5.

Figure 1-6. Rear Components

Table 1-5

Computer Components

Rear

Item Component Function

1 Parallel connector Connects parallel devices such as a printer 2 Serial connector Connects serial devices such as a mouse 3 Infrared port Provides wireless communications (on selected models) 4 External monitor connector Connects external monitor 5 AC Power connector Connects external AC power 6 Docking connector Provides connection to optional convenience base 7 Fan (Airflow vents) Provides thermal ventilation to internal components 8 External keyboard connector Connects external keyboard or PS-2 mouse

(Supports standard Y connector)

Product Description 1-9

1.3.6 Bottom Components

The bottom external components are shown in Figure 1-7 and are described in Table 1-6.

Figure 1-7. Bottom Components

Table 1-6

Computer Components

Bottom

Item Component Function

1 Modem compartment Integrated modem (selected models) 2 Docking latch receptacles Locks computer to optional convenience base 3 Docking alignment guide Aligns computer to optional convenience base 4 Tilt feet Adjusts computer to an angle 5 MultiBay screw Secures MultiBay Devices 6 Hard drive cover Covers hard drive compartment

* Hard drive security screw Secures hard drive cover (not shown)

1-10 Product Description

1.3.7 Status Panel Lights

The status panel lights are shown in Figure 1-8 and described in Table 1-7.

Figure 1-8. Status Panel Lights

Table 1-7

Computer Components

Status Panel

Item Component Function

1 Hard drive activity light Indicates hard drive or CD-ROM access 2 MultiBay activity light Indicates Multi-Bay device activity 3 Number lock indicator Indicates that numbers lock is on 4 Caps lock indicator Indicates that caps lock is on 5 Scroll lock indicator Indicates that scroll lock is on

Product Description 1-11

1.4 Design Overview

This section presents a design overview of the computer. The overview is limited to field replaceable parts. All replacement parts are listed in Chapter 3.

1.4.1 System Unit

The computer is a traditional clamshell design with a display assembly attached to a system unit. The computer opens to reveal a backlit LCD display and a full-function keyboard. The display is designed for a continuously adjustable tilt angle.

1.4.2 Internal Boards

The system electronics are integrated on four printed circuit assemblies: the audio/led board, system board, modem board, and the DC-DC converter board.

■ The audio/led board provides support for the audio functions.

■ The system board integrates the processor, on-board memory, level 2 cache, local

bus video adapter, and PCMCIA/CardBus adapter.

■ The optional modem board supports data or fax functions.

■ The DC-DC converter board creates the system voltages (3.3 VDC and 5 VDC)

from the battery or AC/DC input.

Processor

An Intel Mobile Pentium II processor is located on the system board for the 233 MHz, 266 MHz, or 300 MHz models.

Memory

Base memory is 32-MB with 32-, 64-, or 128-MB of optional expansion memory. Base memory is onboard memory built into the system board. Expansion memory consists of one memory expansion board available as a user installable option. Some models come standard with 64-MB of total memory. This consists of 32-MB of standard memory and 32-MB of additional memory in the memory expansion unit.

Cache

Level 2 cache is integrated in the CPU module. It is not user upgradable.

1-12 Product Description

PCMCIA/CardBus and Video Adapter Controller

The PCMCIA/CardBus adapter is based on the Texas Instrument PCI1220 PC to CardBus controller unit. The local bus video adapter is the Chips and Technologies 65555 controller.

■ The serial-parallel port board expands the serial and parallel signals from the system

board to the serial and parallel expansion connectors.

■ The audio/led board supports the microphone and headphone jacks, the volume

control switches, and the amplifier and equalization circuitry.

1.4.3 Video system

The standard video subsystem consists of:

■ An internal LCD Display

■ 12.1 inch SVGA CTFT display

■ 13.3 inch XGA CTFT display

■ 14.1 inch XGA CTFT display

■ 2 Megabyte frame buffer

■ An inverter to supply AC power to the LCD back-light system

■ A standard external VGA connector for use with CRTs and other VGA compatible

displays

■ 40 KByte Video ROM

Product Description 1-13

chapte

TROUBLESHOOTING

Follow these basic steps when beginning the troubleshooting process:

1. Complete the preliminary steps listed in Section 2.1.

2. Run the Power-On Self-Test (POST) as described in Section 2.3.

3. Run Computer Setup as described in Section 2.5.

4. Run the Computer Checkup (TEST) as described in Section 2.6.

5. If you are unable to run POST or Computer Checkup or if the problem persists after running POST and Computer Checkup, perform the recommended actions described in the diagnostic tables in Section 2.5.

Follow these guidelines when troubleshooting:

■ Complete the recommended actions in the order in which they are given.

■ Repeat POST and Computer Checkup after each recommended action until the

problem is resolved and the error message does not return.

■ When the problem is resolved, stop performing the troubleshooting steps and do not

complete the remaining recommended actions.

■ Refer to Chapter 5 for removal and replacement procedures that are recommended.

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

problem is solved.

The following table describes the troubleshooting actions:

Table 2-1

Trouble Shooting Actions

If You Want To: Then Run:

Check for POST error messages POST Check that computer components are recognized and

running properly View information about the computer and installed or

connected devices Perform any of the following:

■ Check the system configuration

■ Set the system power management parameters

■ Return the system to its original configuration

■ Check system configuration of installed devices

Computer Checkup (TEST) under Compaq Utilities

View System Information (INSPECT) under Compaq Utilities

Computer Setup

Troubleshooting 2-1

2.1 Preliminary Steps

IMPORTANT: Use AC power when running POST, Computer Setup, or Computer

Checkup. A low battery condition could initiate Hibernation and interrupt the test. Before running POST and Computer Checkup, complete the following steps:

1. Obtain established passwords. If you must clear the passwords, go to Section 2.2.

2. Ensure that the hard drive is installed in the computer.

3. Ensure that the battery pack is installed in the computer and the power cord is connected to the computer and plugged into an AC power source.

4. Turn on the computer.

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

6. Run Computer Setup (Section 2.5). If a Setup password has been established, type the password and press Enter.

7. Turn off the computer and all external devices.

8. Disconnect external devices that you do not want to test. If you want to use the printer to log error messages, leave it connected to the computer.

NOTE: If a problem only occurs when an external device is connected to the computer, the problem could be with the external device or its cable. Isolate the problem by running POST with and without the external device connected.

9. Use Compaq Utilities and Loopback plugs in the serial and parallel connectors if you plan to test these ports. Follow these steps to run Compaq Utilities:

a. If you are running Compaq Utilities from the hard drive, turn on or restart the

computer. Press F10 when the cursor appears in the upper right corner of the screen. If you do not press F10 in time, restart the computer and try again.

b. Press Enter to accept OK. c. Select Computer Checkup (TEST). d. Select Prompted Diagnostics. e. After “Identifying System Hardware” completes, select Interactive Testing and

2-2 Troubleshooting

If you are running Compaq Utilities from diskette, insert the Compaq Utilities diskette in drive A. Turn on or restart the computer.

follow the instructions on the screen.

2.2 Clearing Passwords

The power-on password prevents use of the computer until the password is entered. The setup password prevents unauthorized changes to Computer Setup. To clear the passwords, you must remove all power from the system board. If you do not know the passwords, use the following procedure to clear the password:

1. Remove all battery packs from the battery bay and MultiBay, if applicable.

2. Disconnect the AC power.

3. Remove the real-time clock battery.

4. Wait five minutes.

5. Reconnect the AC power.

6. Restart the computer. During Power-On Self Test (POST), a “162 System Options

not set” message appears.

7. Shut down the computer, then disconnect AC power again.

8. Replace the real-time clock battery.

9. Install the battery pack(s).

Proceed with the troubleshooting procedures.

2.3 Power-On Self-Test (POST)

The Power-On Self-Test (POST) is a series of tests that run every time the computer is turned on. POST verifies that the system is configured and functioning properly.

To run POST, complete the following steps:

1. Complete the preliminary steps (Section 2.1).

2. Turn on the computer. If POST does not detect any errors, the computer beeps once or twice to indicate that

POST has run successfully. The computer boots from the hard drive or from a bootable diskette if one is installed in the diskette drive.

Troubleshooting 2-3

2.4 POST Error Messages

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 in Section 2.6.

If POST detects an error, one of the following events occurs:

■ A message with the prefix "WARNING" appears informing you where the error

occurred. The system pauses until you press F1 to continue.

■ A message with the prefix "FATAL" appears informing you where the error

occurred. After the message, the system emits a series of beeps and stops.

■ The system emits a series of beeps and stops.

Warning messages indicate that a potential problem, such as a system configuration error, exists. When F1 is pressed, the system should resume. You should be able to correct problems that produce WARNING messages.

IMPORTANT: When a WARNING message includes the prompt to "RUN SCU," press F10 to run Computer Setup. (Computer Setup replaces the SCU utility.)

2-4 Troubleshooting

If you receive one of the error messages listed in Table 2-2, follow the recommended action.

Table 2-2

Warning Messages

Message Description Recommended Action

CMOS checksum invalid, run SCU CMOS RAM information has been

CMOS failure, run SCU CMOS RAM has lost power. Run Computer Setup to reinitialize

Diskette controller error The diskette drive controller failed

Diskette track 0 failed The diskette drive cannot read

Hard disk controller error The hard drive controller failed to

Keyboard controller failure The keyboard failed the self-test

Keyboard failure The keyboard failed to respond to

No interrupts from Timer 0 The periodic timer interrupt is not

ROM at xxxx (LENGTH yyyy) with nonzero checksum (zz)

Time/Date corrupt - run SCU The time and date stored in the

Hard disk xx failure (or error) A failure or an error occurred when

Unsupported memory module An EDO memory module was

corrupted.

to respond to the recalibrate command.

track 0 of the diskette in the drive.

respond to the reset command.

command.

the RESET ID command.

occurring. An illegal adapter ROM was located

at the specified address.

real time clock have been corrupted, possibly by a power loss.

trying to access the hard drive.

installed in the memory expansion slot.

Run Computer Setup to reinitialize CMOS-RAM.

CMOS-RAM. If there is no diskette drive in the

system, run Computer Setup to properly configure the CMOS-RAM to show no diskette drive present. If the problem persists, or if a diskette drive is present, complete these steps until the problems is solved:

1. Check diskette drive connections.

2. Replace diskette drive.

3. Replace system board. Try another diskette. If the problem

persists, you may need to replace the diskette drive.

Check the drive parameters. Turn off the system and check all related connections.

Replace the system board.

Replace the keyboard. If the problem persists, replace the system board.

Replace the system board.

Check the external adapter (such as a video card) to determine if it is causing the conflict.

1. Run Computer Setup.

2. If problem persists, replace

auxiliary battery.

3. If problems persists, replace

system board.

1. Run Scan disk.

2. Check disk in DOS and

Windows 95. If problem persists, refer to Table 2-11.

Remove the EDO memory module and replace with SDRAM memory module.

Troubleshooting 2-5

Fatal errors emit a beep and may display a FATAL message. Fatal errors indicate severe problems, such as a hardware failure. Fatal errors do not allow the

system to resume. Some of the Fatal error beep codes are listed at the end of this section.

Table 2-3

Fatal Error Message

Message Description Beep Code

CMOS RAM test failed A walking bit test of CMOS RAM location 0E

(Hex) - 3F (Hex) failed.

DMA controller faulty A sequential read/write of the transfer count

and transfer address registers within the primary and secondary DMA controllers failed.

Faulty DMA page registers A walking bit read/write of the 16 DMA

controller page registers starting at location 80 Hex failed.

Faulty refresh circuits A continuous read/write test of port 61h found

that bit 4 (Refresh Detect) failed to toggle within an allotted amount of time.

Interrupt controller failed A sequential read/write of various Interrupt

Controller registers failed.

ROM checksum incorrect A checksum of the ROM BIOS does not match

the byte value at F000:FFFF.

RAM error at location xxxx RAM error occurred during memory test. None

Table 2-4

Fatal Error Beep Codes

Beep Code Beep Sequence Description Recommended Action

0 S-S-S-P-S-S-L-P The DMA page registers are

faulty. 1 S-S-S-P-S-L-S-P The refresh circuitry is faulty. 2 S-S-S-P-S-L-L-P The ROM checksum is incorrect. 3 S-S-S-P-L-S-S-P The CMOS RAM test failed. 4 S-S-S-P-L-S-L-P The DMA controller is faulty. 5 S-S-S-P-L-L-S-P The interrupt controller failed. 6 S-S-S-P-L-L-L-P The keyboard controller failed. 7 S-S-L-P-S-S-S-P Graphics adapter is faulty. 8 S-S-L-P-S-S-L-P Internal RAM is faulty. Replace memory board or

S = Short, L = Long, P = Pause

Replace system board.

system board if memory on system board is faulty.

2-6 Troubleshooting

2.5 Compaq Utilities

Compaq Utilities contain several functions that

■ Determine if various computer devices are recognized by the system and are

operating properly.

■ Provide information about the system once it is configured.

Compaq Utilities include the following programs:

■ Computer Setup

■ Computer Checkup (TEST)

■ View System Information (INSPECT)

To access Compaq Utilities:

1. Turn on or restart the computer by clicking Start ⇒ Shut Down ⇒ Restart the

computer.

2. Press F10 when the blinking cursor appears in the upper-right corner of the display.

3. Select a menu option.

2.5.1 Computer Setup

Computer Setup contains utilities that give you an overall picture of the computer hardware configuration and aid in troubleshooting. These utilities also allow you to set custom features such as security options, power conservation levels, and startup preferences.

If you are running Windows 95, the computer automatically recognizes and configures the system for new devices. If you have a configuration problem or want to view or reset configuration settings, you can use Computer Setup.

NOTE: If you are running Windows 95, you should use Computer Setup only to adjust

system features such as the power-on password or battery conservation level. Windows 95 may override other configuration changes.

If you are running Windows NT, the computer does not automatically recognize new devices added to the system. All devices ordered with your system have been configured for you. Use Computer Setup to view settings for a new device you have added or to reset configuration settings for preinstalled devices.

Computer Setup provides two methods of viewing the computer configuration: by type (factory setting) or connection.

Categories by type:

■ System Features—security, power, boot management

■ Communication—port, modem, and other communication devices

■ Storage—storage-related devices such as hard drive, CD-ROM drive, diskette drive

■ Input Devices—keyboard, mouse, and other input devices

■ Network—network adapter or other network-related devices

■ Audio—sound properties and audio device settings

■ Video—display timeouts and video device resources

■ Other—miscellaneous devices

Troubleshooting 2-7

Categories by connection:

■ System Features—security, power, boot management

■ System Devices—keyboard, mouse, parallel and serial ports

■ ISA—ISA bus and connected devices

■ PCI—PCI bus and connected devices

■ PC Card—PC Card devices

Running Computer Setup

1. Turn on or restart the computer by clicking Start ⇒ Shut Down ⇒ Restart the

computer.

2. Press F10 when the blinking cursor appears in the upper-right corner of the screen.

NOTE: If you a setup password is enabled, it must be used to access Computer Setup.

3. Click a language and press Enter.

4. Click Computer Setup and press Enter.

5. When you are finished, click Exit.

Exiting Computer Setup

1. Click Exit.

2. Select one of the following Exit options:

■ Save—Saves the new settings and exits Computer Setup.

NOTE: Some settings may not take effect until the computer is restarted.

■ Ignore—Exits Computer Setup and restores previous settings.

■ Cancel—Returns to Computer Setup.

2-8 Troubleshooting

2.5.2 Computer Checkup (TEST)

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

NOTE: Compaq Utilities are intended for testing only Compaq-supplied components. Testing of non-Compaq components may be inconclusive.

Running Computer Checkup (TEST)

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

2. Connect a printer if you want to print a log of error messages.

3. Turn on the external devices that you want to test.

4. Turn on or restart the computer.

5. Access Compaq Utilities by pressing F10 when the blinking cursor appears in the upper-right corner of the display.

6. Click Computer Checkup ⇒ View the Device List.

■ If the list of installed devices is correct, click OK.

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

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

■ Quick Check Diagnostics

■ Automatic Diagnostics

■ Prompted Diagnostics

8. Follow the instructions on the screen as the devices are tested.

9. Click Exit Diagnostics ⇒ Exit from this utility.

Computer Checkup (TEST) Error Codes

Computer Checkup (TEST) error codes occur if the system recognizes a problem while running Computer Checkup. These error codes help identify possible defective assemblies. Table 2-5 through Table 2-15 list Computer Checkup error codes, a description of the error condition, and the recommended action for resolving the condition. For removal and replacement procedures, refer to Chapter 5.

IMPORTANT: Run Computer Checkup each time you complete a recommended action step. If the problem is resolved when POST and Computer Checkup are rerun (i.e., with no error codes), do not perform the remaining recommended action steps.

NOTE: The error codes in the following tables are listed in an “AYE-XX” format, where:

A or AA = Number that represents the faulty assembly

YY = Test or action that failed XX = Specific problem

Troubleshooting 2-9

Table 2-5

Processor Test Error Code

Error Code Description Recommended Action

101-xx CPU test failed. 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.

Table 2-6

Memory Test Error Codes

Error Code Description Recommended Action

200-xx Memory machine ID test failed. The following steps apply to error codes 200-xx 202-xx Memory system CMOS checksum failed. 1. Flush the system CMOS and retest. See note.

203-xx Write/Read test failed. The following applies to error codes 203-xx 204-xx Address test failed. Remove and replace the SODIMM memory board

211-xx Random pattern test failed. 214-xx Noise test failed. 215-xx Random address test failed.

and 202-xx:

2. Replace the system board and retest. through 215-xx: or system board (if the memory on the system

board is faulty) and retest.

Table 2-7

Keyboard Test Error Codes

Error Code Description Recommended Action

300-xx Failed ID Test. 1. Reseat the keyboard assembly. 301-xx Failed Self test/Interface Test. 2. Replace the keyboard and retest. 302-xx Failed Individual Key Test. 3. Replace the system board and retest. 304-xx Failed Keyboard Repeat Test.

Error Code Description Recommended Action

401-xx Printer failed or not connected. 1. Connect the printer. 402-xx Failed Port Test. 2. Check power to the printer. 403-xx Printer pattern test failed. 3. Install the loopback connector and retest.

2-10 Troubleshooting

Table 2-8

Parallel Printer Test Error Code

4. Check port and IRQ configuration.

5. Replace the system board and retest.

Note: Fn + F11 clears the ESCD configuration information. If the Fn + F11 sequence is

pressed very early after powering the machine on (after you see the keyboard LEDs blink, but before the video is initialized), CMOS memory will be invalidated. The ESCD is cleared, the machine is reset and boots with the "162 - System Options Not Set" message. This is a way to clear out configuration information, such as the Windows 95 knowledge about a docking station. It may help clear up problems if the configuration information had been corrupted. Timing of this keystroke sequence is critical, as there is a very narrow window during which the keys will be recognized. These keys are not documented to users.

Table 2-9

Diskette Drive Error Code

Error Code Description Recommended Action

600-xx Diskette ID drive types test

failed.

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 test 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. 698-xx Diskette drive speed not within limits. 699-xx Diskette drive/media ID error.

The following steps apply to error codes 600-xx through 698-xx:

1. Replace the diskette.

2. Replace the diskette drive and retest.

3. Replace the system board and retest.

1. Replace media.

2. Run Compaq Utilities.

Table 2-10

Serial Test Error Codes

Error Code Description Recommended Action

1101-xx Serial port test failed.

1. Check port configuration.

2. Replace the system board and retest.

Troubleshooting 2-11

Table 2-11

Hard Drive Test Error Code

Error Code Description Recommended Action

1701-xx Hard drive format test failed. 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

1. Run Compaq 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.

Table 2-12

Video Test Error Codes

Error Code Description Recommended Action

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

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.

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.

2402-xx through 2456-xx:

1. Run Compaq 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.

Continued

2-12 Troubleshooting

Table 2-12 Video Test Error Codes

Continued

Error Code Description Recommended Action

2406-xx Video 80 × 25 mode 8 × 8 character cell 2411-xx Video screen memory page test failed.

2412-xx Video gray scale test failed. 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. 2421-xx ECG/VGC 640 × 200 graphics mode test

2422-xx ECG/VGC 640 × 350 16 color set test 2423-xx ECG/VGC 640 × 350 64 color set test 2424-xx ECG/VGC monochrome text mode test 2425-xx ECG/VGC monochrome graphics mode test 2431-xx 640 × 480 graphics test failed.

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 Bit BLT test failed. The following step action to error codes 2458-xx

2468-xx Advanced VGA DAC test failed. Replace the system board and retest. 2477-xx Advanced VGA data path test failed. 2478-xx Advanced VGA BitBLT test failed. 2480-xx Advanced VGA Linedraw test failed.

Refer to Table 2-26 for information about other video errors.

test failed.

failed. failed. failed. failed. failed.

to 2480-xx:

Table 2-13

Audio Test Error Codes

Error Code Description Recommended Action

114-01 Speaker test failed.

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

1. Check system configuration.

2. Verify that the audio/led board is properly seated.

3. Verify display audio cable connection.

Table 2-14

Pointing Device Interface Test Error Code

Error Code Description Recommended Action

8601-xx Pointing device test failed. Replace the keyboard/CPU cover assembly. 8602-xx Interface test failed.

Troubleshooting 2-13

Table 2-15

CD-ROM Test Error Codes

Error Code Description Recommended Action

3301-xx CD-ROM drive read test failed.

3305-xx CD-ROM 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.

1. Replace the CD and retest.

2. Verify that drivers are loaded and properly installed.

3. Replace the CD-ROM drive and retest.

4. Replace the system board and retest.

2.5.3 Running 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.

In order to access the INSPECT utility, follow the instructions below:

1. Connect a printer if you want to print the INSPECT information.

2. Turn on or restart the computer.

3. Access Compaq Utilities by pressing F10 when the cursor blinks in the upper-right

corner of the display.

4. If prompted, select a language.

5. Click View System Information (INSPECT).

6. Click the item you want to view. The list includes the following:

■ System ■ Audio

■ ROM ■ Operating system

■ Keyboard ■ System files

■ System ports ■ Windows files

■ System storage ■ Miscellaneous

■ Graphics

■ Memory

■ Network - Applicable only i

computer is docked in the Convenience Base II

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.

8. Select Exit Inspect.

The Compaq Prosignia is only supported by Convenience Base II. It is not supported by any prior convenience bases.

2-14 Troubleshooting

2.5.4 Running Compaq Diagnostics

Compaq Diagnostics provides computer component information when the operating system is working.

If you are running Windows 95, access Compaq Diagnostics for Windows by double-clicking My Computer ⇒ Control Panel ⇒ Compaq Diagnostics.

2.5.5 Boot Sequencing

1. Run Computer Setup.

2. Click the System Features icon ⇒ Boot Management box ⇒ MultiBoot tab.

3. Designate the hard drive boot (startup) sequence you want.

4. Click OK to accept the changes.

Troubleshooting 2-15

2.5.6 Factory Default Settings

Initialization

Enable POST Memory Test Checked (enabled) Keyboard num Lock Unchecked (Off)

1 Hard drive in the computer

2 Hard drive in the computer MultiBay Boot display Auto Language Language of country

Ports

Serial/infrared ports

Serial port 3F8, IRQ4

Infrared port 2F8, IRQ3 Parallel port 378, IRQ7 Ethernet port 300, IRQ9

Power

Low Battery Warning Beep Checked (enabled) External Energy Saving Monitor Connected Unchecked (not connected) Power Management Enabled While operating power on battery Conservation Level Medium Level Definition

High Suspend Time: 5 minutes

Hibernation Timeout: Immediate Drive Timeout: 2 minutes Screen Timeout: 2 minutes

Medium Suspend Time: 10 minutes

Hibernation Timeout: 1 hour Drive Timeout: 6 minutes Screen Timeout: 4 minutes

Custom Suspend Time: disabled

Hibernation Timeout: low battery Drive Timeout: always on Screen Timeout: always on

Security

Enable QuickLock/QuickBlank Unchecked (Disabled) Enable Power-On Password Unchecked (Disabled) Disable Serial/Infrared Ports Unchecked (Enabled) Disable Parallel Port Unchecked (Enabled) Disable PC Card Slots Unchecked (Enabled) Setup Password Password blank Power-On Password Password blank Diskette Drives

Disable Diskette Drives Unchecked (Enabled)

Disable Diskette Boot Unchecked (Enabled)

2-16 Troubleshooting

2.6 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 messages that may be displayed on the screen.

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.

2.6.1 Before Replacing Parts

When troubleshooting a problem, check the following items for possible solutions before replacing parts:

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

■ Verify that all required device drivers are installed.

■ Verify that all printer drivers have been installed.

2.6.2 Checklist for Solving Problems

If you encounter a minor problem with the computer or software applications, go through the following checklist for possible solutions:

■ Is the computer connected to an external power source, or does it have a fully

charged battery pack installed?

■ Are all cables connected properly and securely?

■ Did the diskette drive contain a nonbootable diskette when you turned on the

computer?

■ Have you installed all the needed device drivers? For example, if you are using a

mouse, you may need to install a mouse device driver.

■ Are printer drivers installed?

Eliminating the typical problems described in this Troubleshooting section may save you time and money. If the problem appears related to a software application, check the documentation provided with the software. You may discover something you can resolve easily by yourself.

Troubleshooting 2-17

Solving Audio Problems

Fn+F5

Table 2-16

Solving Audio Problems

Problem Probable Cause Recommended Action(s)

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

Computer beeped five times and battery light is blinking.

Computer does not beep to indicate a low-battery condition.

Audio playback is too low or too loud.

Internal speakers produce no sound.

Speaker volume has been turned down.

Computer has entered a low-battery condition.

Low-battery warning beeps have been turned off.

System beeps have been turned down too low.

The computer volume control and/or the software volume control needs to be adjusted.

Volume has been muted. Press the increase volume control button to

External speakers or headphones are connected to the computer.

Speaker wires are not connected.

Speakers are bad. Replace the speakers.

Adjust the volume with the volume control buttons located at the top right corner of the computer.

Immediately save open files and resolve the low battery condition.

Enable low-battery warning beeps in Windows 95 Power Properties or in Computer Setup power management.

Press to increase the volume of the system beeps.

In Windows 95, adjust the computer volume control buttons and adjust the volume control in Multimedia Properties.

NOTE: The volume control in Multimedia Properties only affects the “Wave” audio

sources such as system sounds and *.wav file playback. To change other sources such as MIDI, video sound, and game effects, use the Volume Control application in accessories/Multimedia.

In Windows NT, adjust the multimedia volume control under the Accessories folder.

increase the volume. Press Fn+F5, then press the right arrow key to increase the volume of the system beeps

Use the external speakers or headphones or use the Convenience Base II speakers.

To use the internal speakers, disconnect the external speakers or headphones or undock the computer.

Make sure the speaker wires are connected properly.

, then press the right arrow key

Continued

2-18 Troubleshooting

Table 2-16 Solving Audio Problems

Continued

Problem Probable Cause Recommended Action(s)

Internal speaker does not produce sound when an external audio source is connected to the stereo line-in jack.

External microphone does not work.

No sound from game program.

No sound from headphones. Volume or mixing controls set

Volume may be turned off or set too low.

Line input may not be connected properly.

Headphones or speakers are connected to the stereo speaker/headphone jack, which disables the internal speakers.

The wrong type of microphone or microphone plug is being used.

The microphone may not be connected properly.

Sound source is not selected. Ensure that microphone is selected as the

Audio settings are not set correctly.

Computer volume control is turned down.

Headphones are connected. Use or disconnect the headphones.

incorrectly.

Sound source not selected. Verify that the sound source is selected in

Volume or mixing controls set incorrectly.

Adjust the volume control located at the top right corner of the computer.

Use the volume control and mixing features available in Control Panel ⇒ Multimedia.

Adjust the volume using the speaker icon on the taskbar.

Check line input connection.

Disconnect the headphones or speakers to enable the internal speakers.

Check to see if a monophonic electret condenser microphone with a 3.5-mm plug is being used.

Ensure that the microphone plug is properly connected to the mono microphone jack.

recording source in Control Panel ⇒ Multimedia and that the recording level is adjusted.

Check the game program audio settings.

Adjust the volume with the volume control buttons located at the top right corner of the computer.

Use the volume control and mixing features available in Control Panel ⇒ Multimedia.

Control Panel ⇒ Multimedia. Adjust the volume with the volume control

buttons located on the right side of the computer.

Check the volume and mixer controls in Control Panel ⇒ Multimedia.

Troubleshooting 2-19

Solving Battery Problems

The following table lists some common battery problems and recommended actions to take when they occur. The "Solving Power Problems" section in this chapter also may be applicable.

Table 2-17

Solving Battery and Battery Gauge Problems

Problem Probable Cause Recommended Action(s)

The computer turns on the first time it is used, but the battery does not charge.

Computer does not turn on when battery pack is inserted and power cord is unplugged.

Computer beeped five times and battery light is blinking.

Computer battery light blinks to indicate low battery condition, but computer does not beep.

Battery light does not turn on to indicate battery pack Is charging.

Battery pack is warm to the touch after charging.

The battery pack is in ship mode.

Battery is discharged. Ensure that the battery pack is

Computer has entered a low-battery condition.

Low battery beeps were turned off.

Volume is turned off or turned down too low.

Battery pack is already charged.

Battery pack was exposed to temperature extremes.

Battery pack is at the end of its life.

Warming occurs during charging.

Remove and reinsert the battery pack.

properly installed. Connect the computer to an external power

source and charge the battery pack. Replace the battery pack with a fully charged

battery pack. Check battery status by pressing Fn+F8. Immediately save any open file(s). Then do

one of the following:

1. Connect the computer to an external power source.

2. Turn the computer off and replace the battery pack.

Run Computer Setup and turn on the low battery warning beeps.

Press Fn+F5 to adjust the volume of the system warning beeps.

No action is necessary. Allow time for the battery pack to return to

room temperature. Replace the battery pack.

No action is required.

Continued

2-20 Troubleshooting

Table 2-17 Solving Battery and Battery Gauge Problems

Continued

Problem Probable Cause Recommended Action(s)

Computer turned off and information in memory was lost when the battery pack was replaced.

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

Battery pack charge does not last as long as expected.

Computer is beeping and battery power light is blinking.

Hibernation was disabled, Suspend was not initiated, or AC power was not connected before the discharged battery pack was removed.

Real time clock (RTC) battery is at the end of its life.

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

Battery pack has partially self-discharged.

Power management is disabled.

An external device or PC Card is draining the battery.

Battery pack charge is low. Do one of the following:

To prevent loss of information next time, initiate Suspend, enable Hibernation, or connect AC power before changing batteries..

Replace the RTC battery.

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.

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

Press Fn+F7 and set the power conservation level.

Turn off or disconnect external devices when not using them.

Charge the battery pack. Replace the battery pack. Connect the computer to an external power

source. Initiate Hibernation.

Solving CD-ROM Drive Problems

Table 2-

Solving CD-ROM Drive Problems

Problem Probable Cause Recommended Action(s)

CD-ROM drive cannot read a compact disc.

CD-ROM drive is not recognized by the computer.

Compact disc is not properly seated in the CD-ROM drive.

Compact disc is loaded in the CD loading tray upside down.

Compact disc has a scratch on its surface.

CD-ROM drive is not connected properly.

Open the CD loading tray, lay the compact disc on it, then close the tray.

Open the CD loading tray, turn over the compact disc (label facing up), then close the tray.

Insert a different compact disc.

Turn off the computer, remove the CD-ROM drive and reinsert it.

Troubleshooting 2-21

Solving Diskette and Diskette Drive Problems

Table 2-19

Solving Diskette and Diskette Drive Problem

Problem Probable Cause Recommended Action(s)

Diskette drive cannot read a diskette.

Diskette drive cannot write to a diskette.

Diskette media has a bad sector.

Using the wrong diskette type for the diskette drive type.

Diskette is not formatted. Format the diskette.

Diskette is write-protected. Use another diskette that is not

Writing to the wrong drive. Check the drive letter in your path

Not enough space is left on the diskette.

Disable diskette write ability is turned on.

Copy remaining files to the hard drive or another formatted diskette. Reformat the diskette.

Use the required diskette type.

If you are using Windows 95: From the Windows 95 desktop, double-click

My Computer.

Click 3 ½ Floppy (A:) ⇒ File ⇒ Format. Fill in the appropriate information, then click

Start. If you are using Windows NT, format the

diskette by entering format a: at the system prompt.

If you are using Windows 95: From the Windows 95 desktop, double-click

My Computer. Click 3 ½ Floppy (A:) ⇒ File ⇒ Format. Fill in the required information, then click

Start. If you are using Windows NT, format the

diskette by entering format a: at the system prompt.

write-protected or disable the write-protect feature.

statement. Save the information to another diskette.

Run Computer Setup. Click on the Storage icon. Make sure Disable diskette write ability is not checked.

2-22 Troubleshooting

Solving Hard Drive Problems

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

of the hard drive.

Table 2-20

Solving Hard Drive Problems

Problem Probable Cause Recommended Action(s)

Cannot access hard drive. Hard drive is not seated. Shut down the computer, remove and

Hard drive was inserted while computer was on, in Suspend, or in Hibernation.

Hard drive may be damaged. Try inserting another hard drive.

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

Hard drive error occurs. Hard drive has bad sectors or

Hard drive error occurs. Hard drive may be damaged. Try inserting another removable drive, if the

Errors occur after starting from an additional hard drive.

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

Hibernation was initiated and system is now exiting from it.

has failed.

Additional hard drive does not have the software and drivers necessary to boot and operate correctly.

reinsert the hard drive, then turn on the computer.

Shut down the computer, then turn it on again to initialize it during power on.

Give the system time to restore the previously saved data.

Do one of the following: If you are running Windows 95, access

ScanDisk by clicking Start ⇒ Programs ⇒ Accessories ⇒ System Tools ⇒ ScanDisk, then check the Automatically fix errors box. Click Start to begin scanning.

If you are running Windows NT, go to the system prompt and type chkdsk to scan for errors.

Reformat the hard drive. Contact your Compaq authorized dealer,

reseller, or service provider or Compaq customer support for assistance.

hard drive is in the MultiBay. Boot from the hard drive supplied with the

computer or another hard drive that has the necessary software and drivers.

the hard drive, then reinsert it.

Troubleshooting 2-23

Solving Hardware Installation Problems

Table 2-21

Solving Hardware Installation Problems

Problem Probable Cause Recommended Action(s)

New device is not recognized as part of the computer system.

The system did not automatically configure the new device.

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

Power switch of new external device is not turned on.

New device is not configured for Windows NT.

In Windows 95, double-click the Add New Hardware icon in Control Panel.

Refer to the documentation that came with the new device for installation instructions.

Ensure that all cables are properly and securely connected and the power cord is plugged into an electrical outlet.

1. Turn off the computer.

2. Turn on the external device.

3. Turn on the computer to integrate the device with the computer system.

Use Computer Setup to view settings for the new device or to reset the configuration settings for preinstalled devices.

2-24 Troubleshooting

Solving Infrared Connection Problems

NOTE: The computer is shipped with the infrared port disabled. The port must be

enabled each time the computer is started or restarted. Follow these steps to enable the infrared port.

1. Click Start ⇒ Settings ⇒ Control Panel.

2. Double click the Infrared icon.

3. Select the Options tab.

4. Check the box labeled Enable Infrared Communications to select the Com3 port.

5. Click OK. The infrared icon appears on the task bar.

NOTE: Windows NT does not support infrared communication.

Table 2-22

Solving Infrared Connection Problems

Problem Cause Recommended Action(s)

Cannot link with another computer.

Data transmission problem Direct sunlight, fluorescent

Cannot connect at 4 MB/sec Fast IR driver not installed Fast-IR is not preinstalled. Download FAST-

Interrupt request (IRQ) conflict Check IRQ assignments for conflicts and

Baud rate conflict Select the same baud rate for both

# bits conflict Select the same “#bits” setting for both

Stop bit conflict Select the same stop byte for both

Parity conflict Select the same parity setting for both

light, or flashing incandescent light is close to the infrared connections.

Interference from other infrared devices

Physical obstruction Do not place objects between the two units

Movement Do not move either unit during data

Orientation Adjust devices so that they point within 30

Distance Verify that devices are not more than 3 feet

reassign as necessary.

computers.

computers. Remove the interfering light sources.

Keep remote control units and other infrared devices away from the infrared connections.

that will interfere with a line-of-sight data transmission.

transmission.

degrees of each other.

(1 meter) apart.

IR driver from Compaq web site and install.

Troubleshooting 2-25

Solving Modem Problems

Table 2-23

Solving Modem Problems

Problem Probable Cause Recommended Action(s)

Modem loses connection. The connection from the

Noisy telephone line Phone line noise causing

Phone line noise causing a disconnection.

phone line to the modem is loose.

Call Waiting has not been disabled.

garbled or missing characters, or slow data transfer speeds.

Hang-up Delay S Register (S10) set too low.

Check to make sure the telephone cable is properly connected.

Disable Call Waiting.

1. 1Click Start ⇒ Control Panel ⇒ double-click Modems.

2. From the General tab of the Modems Properties page, click Dialing Properties.

3. From the My Locations tab of the Dialing Properties page, check the box labeled This location has call waiting. Select *70, 70#, or 1170 from the drop-down list to disable call waiting for your dialing area.

Check your telephone and modem cable connections. If they are a little loose, they can cause noise on the line.

Check with your local telephone company for a phone line filter.

Change S10 default to 150.

1. Click Start ⇒ Programs ⇒ Accessories ⇒ HyperTerminal.

2. Go to Command Mode.

3. Type ATS10=150 and press Enter.

This command causes the modem to take longer to disconnect even if there is noise on the line.

Continued

2-26 Troubleshooting

Table 2-23 Solving Modem Problems

Continued

Problem Probable Cause Recommended Action(s)

No dial tone Phone service is not

Characters are garbled and transfer rates are slow.

connected to the telephone wall jack.

The modem is not responding to commands from the computer keyboard.

Speaker Control AT Command (ATM) is set to 0.

The modem is plugged into a digital PBX line rather than an analog line.

There is noise in the telephone line.

Verify service from the local phone company:

1. Unplug the telephone cable from the telephone wall jack.

2. Connect a telephone to the jack, pick up the handset, and listen for a dial tone. If there is a dial tone, reconnect the modem to the telephone wall jack with the telephone cable and make sure all connections are secure.

3. If there is still no dial tone, contact your local phone company or building manager.

Verify the modem and computer are connected:

1. Click Start ⇒ Programs ⇒ Accessories ⇒ HyperTerminal.

2. Go to Terminal Mode, then type AT and press the Enter key.

If the modem displays OK, the modem

and computer are working together. If the modem displays ERROR, or does not respond, restart the computer and repeat step 1.

3. Type ATDT and listen for a dial tone.

4. Type ATH0 (zero) to hang up. Set the Speaker Control to 1:

1. Click Start ⇒ Programs ⇒ Accessories ⇒ HyperTerminal.

2. Go to Command Mode, type ATM1 and press Enter.

3. Type ATH1 and listen for a dial tone.

4. Type ATH0 (zero) to hang up.

Plug the modem into an analog line. If you are in an office, the analog line is often the one connected to a fax machine or modem. To get an analog line in a hotel, request a room with a “data” line.

Check your telephone and modem cable connections. If they are loose, they can cause noise on the line.

Check with your local telephone company for a phone line filter.

Continued

Troubleshooting 2-27

Table 2-23 Solving Modem Problems

Continued

Problem Probable Cause Recommended Action(s)

Phone line noise causes a disconnection.

Ten-digit dialing does not work correctly under Windows

95.

Modem cable disables/interferes with other telephony devices (Germany, Austria, and Switzerland only).

Modem does not dial correctly under Windows 95 (Switzerland and Germany only).

Hang-Up Delay S Register (S10) set too low.

Ten-digit dialing doesn’t work correctly under Windows 95, making it difficult to dial numbers in a different area code that are not long distance calls.

The modem cable does not provide the additional 4-wire connection required in Germany, Austria, and Switzerland to form the serial pass-through necessary so that other devices can work on the same phone line.

The “Wait for dial tone before dialing” check box is checked. This causes Windows 95 to issue an ATDT; command. A typical dial string would look like this:

ATDT; ATDTnnn-nnnn In Germany and Switzerland,

the ‘;’ dial modifier is not permitted to be used in this fashion by regulatory agencies since ATDT; takes the modem off-hook without dialing. Therefore, the modem returns an error message when attempting to dial. The error message reads:

“The computer is not receiving a response from the modem. Check that the modem is plugged in, and if necessary, turn the modem off, then turn it back on.”

Change S10 default to 150. Click Start ⇒ Programs ⇒

Accessories ⇒ HyperTerminal. Go to Command Mode. Type ATS10=150 and press Enter. This command causes the modem to take

longer to disconnect even if there is noise on the line.

Since Windows 95 does not limit the number of digits you can enter in the Phone Number field, set the Area Code field to match your local area code. Then type the ten-digit telephone number in the Phone Number field.

To use another telephony device on the same line in these countries, unplug the modem cable from the wall jack first.

Click Start ⇒ Settings ⇒ Control Panel. Double-click the Modems icon. Click the Properties button. Select the Connection tab. Click the “Wait for dial tone before dialing”

check box to clear it. Click OK ⇒ Close.

2-28 Troubleshooting

Solving PC Card Problems

Table 2-24

Solving PC Card Problems

Problem Probable Cause Recommended Action(s)

Computer does not beep when PC Card is inserted but PC Card works correctly.

Computer does not beep when PC Card is inserted and PC Card does not work.

Computer beeps twice, but modem and/or fax does not work.

Computer beeps twice but network card does not work.

Computer beeps twice when a storage card is inserted, but the card does not work.

PC Card does not work Windows NT was running

System beeps are turned down.

PC Card sound effects have been disabled.

PC Card is not inserted properly.

The PC Card slots have been disabled.

Card or card driver is not compatible with the computer or with the operating system.

Telephone cord is not plugged in all the way.

The wrong COM port is being used to access the card.

Network server is unavailable. Contact system administrator.

The wrong drive letter is being used to access the storage card.

when the PC Card was inserted.

Press Fn+F5, then press the right arrow key to increase the system beeps volume.

In Windows 95, double-click PC Card icon ⇒ Global Settings tab. Deselect Disable PC Card Sound Effects.

Remove and reinsert the card gently to avoid damaging the pins.

Run Computer Setup to enable the PC Card slots. When the system starts, press F10 then select Computer Setup ⇒ Other Devices ⇒ PC Card Controller ⇒ Resources. Deselect the “Disabled” check box.

In Windows 95, click Start ⇒ Settings ⇒ Control Panel ⇒ System ⇒ Device Manager ⇒ PCMCIA Socket. Double-click the Texas Instruments TI-1131 CardBus controller to view device properties. Deselect the “Disable in this hardware profile” check box.

Contact service provider for a list of compatible PC Cards.

Verify that the telephone connection is secure.

Verify the COM port assigned to the card and within the application is correct.

In Windows 95, click Start ⇒ Help ⇒ Contents ⇒ Troubleshooting ⇒ Problem. Follow the instructions on the screen.

Open Windows Explorer and verify the drive letter.

Turn off the computer and reinsert the PC Card.

Troubleshooting 2-29

Solving Power Problems

Table 2-25

Solving Power Problems

Problem Probable Cause Recommended Action(s)

Computer will not turn on. Computer is not connected to

Computer will not turn on when connected to external power if battery pack is in the computer.

Computer turned off while it was left unattended and the power/suspend light is off.

Computer turned off while it was left unattended and will not turn on.

Computer initiated Suspend or turned off when it was docked.

Hibernation does not work properly.

Computer does not turn on when connected to external power and no batteries are installed.

a power source. Power cord to the external

power source is unplugged.

Battery pack is discharged. Insert a fully charged battery pack or connect

CMOS data is corrupt Flush CMOS memory. Battery pack may be defective. Remove battery pack, insert another battery

System initiated Hibernation after a preset timeout.

System initiated Hibernation and/or shut down because of a critical low-battery condition.

The maximum operating temperature was exceeded.

Hibernation was not reset after a memory upgrade.

Internal power supply is bad. Replace the internal power supply.

Insert battery pack or connect an external power source.

Ensure that power cord connecting the computer and the external power source is plugged in properly.

an external power source.

pack, and try again.

Turn on the computer to restore information at the point where Hibernation was initiated.

NOTE: To change the Hibernation timeout setting in Windows 95, click the Hibernation tab in Power Properties. In Windows NT, run Computer Setup and select Power Management.

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

Computer is in a high temperature environment and the fan is not able to cool it. Let the computer cool down and turn it on again.

Make sure the ventilation intake and exhaust are not obstructed.

Reset Hibernation in the Power Management utility.

2-30 Troubleshooting

Solving Screen Problems

IMPORTANT: Conduct all tests on a working monitor. If the recommended actions do

not solve the problem, replace the display. If the problem persists with a new display, replace the system board.

Table 2-

Solving Screen Problems

Problem Probable Cause Recommended Action(s)

Characters are dim. The brightness or contrast

Screen is blank. QuickLock/QuickBlank was

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

Screen is blank and the power/suspend light is blinking.

Screen is blank and the power/suspend light and the battery light are blinking.

External monitor does not display information.

Small red, green, or blue spots appear on the computer CTFT display.

control (if applicable) is not set properly.

Computer screen is in direct light.

Display is damaged. Replace the display.

initiated. Screen save was initiated after

the Power Management timeout period.

Brightness or contrast needs adjusting.

Screen has overheated. If computer is in direct sunlight, move it and

Display was switched to the external monitor.

System initiated Suspend. Press the suspend button to exit Suspend.

System has entered a critical low-battery condition.

External monitor was connected after the computer was turned on.

The external monitor signal cable or power cord is not properly connected.

Small spots, called on-pixels, often appear on CTFT screens. Compaq limits the number of these on-pixels to 0.003 percent.

Adjust the control(s) with the hotkeys: Fn+F9 and Fn+F10.

Tilt the display or move computer.

Enter the password to exit QuickLock/QuickBlank.

Press any key or click the mouse.

Adjust the control(s) with the hotkeys: Fn+F9 and Fn+F10.

allow it to cool. Press the Fn+F4 hotkeys to display

information on the computer screen.

Enter the power-on password if prompted.

Immediately connect the computer to an external power source or replace the battery pack.

Press the Fn+F4 hotkeys to switch to the external monitor.

Ensure that the cables are properly connected.

No action is required.

Continued

Troubleshooting 2-31

Table 2-26 Solving Screen Problems

Continued

Problem Probable Cause Recommended Action(s)

Display on an external monitor is distorted.

The image has a black border and does not fill the screen.

Incorrect display device drivers are installed or incorrect resolution is set.

The external monitor is not Energy Star compliant, but monitor energy saving feature is enabled.

The Desktop Area setting is smaller than the Resolution setting.

Double-click the Display icon in Control Panel, click the Settings tab, and set the correct display type and resolution for the external monitor.

Complete these steps:

1. Press any key or move the pointing device to restore the display.

2. If display remains distorted, turn off the monitor, then turn it on again.

3. Disable the monitor energy saving feature in Display Properties or in Computer Setup Power Management.

Adjust the settings for the Desktop Area and Resolution. Double-click Control Panel Display ⇒ Settings ⇒ Compaq.

Press the Fn+T keys to expand the image.

Solving USB Problems

Table 2-27

Solving USB Problems

Problem Probable Cause Recommended Action(s)

External device connected to a USB connector does not work.

External device connected to a USB connector does not work during startup (before Windows 95 loads).

External devices in lower tiers do not work.

The operating system limits external devices connected by USB to two tiers that can include no more than two hubs on the first tier and no more than one keyboard and one pointing device on the first or second tier.

During startup, only two tiers are supported by the USB connector. These tiers can include no more than two hubs on the first tier and no more than one keyboard and one pointing device on the first or second tier.

An unpowered hub is connected to another unpowered hub.

Reduce the number of connected external USB devices to no more than two hubs on the first tier, and no more than one keyboard and one pointing device on the first or second tier.

Use the external device only after Windows 95 has loaded.

Reduce the number of connected external USB devices to no more than two hubs on the first tier, and no more than one keyboard and one pointing device on the first or second tier.

Use only powered hubs. Make sure that all unpowered hubs are

immediately preceded by powered hubs in the USB chain.

2-32 Troubleshooting

chapter

LLUSTRATED PARTS CATALOG

This chapter provides illustrated parts and references for spare parts for the Compaq Prosignia Notebook Family of Personal Computers. To review an illustrated parts breakdown of the computer, refer to the guide.

Illustrated Parts Map

that comes with this

Illustrated Parts Catalog 3-1

3.1 System Unit

Figure 3-1.

3-2 Illustrated Parts Catalog

System Unit

Table 3-1

System Unit

Item Description Spares Part Number

Keyboard (US/Canada) 382759-001

Top cover assembly with speakers 382729-001

Base enclosure assembly 316281-001

12.1-inch CTFT display assembly 382719-001

* 13.3-inch CTFT display assembly 382726-001 * 14.1-inch CTFT display assembly 382727-001 * 14.1-inch CTFT display (w/EMI Shielding) 382727-002

* Not illustrated

Illustrated Parts Catalog 3-3

3.2 Mass Storage Devices

Figure 3-2.

3-4 Illustrated Parts Catalog

Mass Storage Devices

Table 3-2

Mass Storage Devices

Item Description Spares Part Number

24x CD-ROM drive 382736-001

* DVD-ROM drive module 382737-001 * 3.2 GB hard drive 255248-001

4.0 GB hard drive 255292-001

* 6 GB hard drive 316269-001

1.44-MB, diskette drive 382738-001

LS-120 drive module 382746-001

100-MB ZIP drive module 382756-001

Not illustrated

Illustrated Parts Catalog 3-5

3.3 Cables and Power Cords

Figure 3-3.

Cables and Power Cords

Table 3-3

Cables and Power Cords

Item Description Spares Part Number

AC power cord (US/Canada) 255135-001

Modem cable (included in optional modem kit)

RTC battery 316284-001 (included in shielding kit)

3-6 Illustrated Parts Catalog

3.4 Standard and Optional Boards

Figure 3-4.

Standard and Optional Boards

Illustrated Parts Catalog 3-7

Table 3-4

Standard and Optional Boards

Item Description Spares Part Number

Memory board (SO DIMM), 16-MB, 60 ns, nonparity 313917-001

* Memory board (SO DIMM), 32-MB, 60 ns, non parity 313911-001 * Memory board (SO DIMM), 64-MB, 60 ns, non parity 313918-001 * Memory board (SO DIMM), 128-MB, 60 ns, non parity 310345-001

Audio/LED board 316260-001

DC-DC voltage converter 316264-001

System board with 233-MHz Intel Pentium II CPU 382789-001

* System board with 266-MHz Intel Pentium II CPU 382790-001 * System board with 300-MHz Intel Pentium II CPU 382791-001

K56flex modem 316279-001

IR module 316313-001

* Not illustrated

3-8 Illustrated Parts Catalog

3.5 Options

Figure 3-5.

Options

Table 3-5

Options

Item Description Spares Part Number

1 Automobile/aircraft adapter 313919-001 2 External battery charger 254970-001 3 Li-Ion battery pack 382739-001 4 Hard drive adapter 382794-001 * Convenience Base II - pass through 316291-001 * Convenience Base II - Ethernet 316312-001 * Monitor stand 316286-001 * Slipcase cover 330511-001 * Options carrying case 330513-001

Not illustrated

Illustrated Parts Catalog 3-9

3.6 Miscellaneous Parts

Figure 3-6

3-10 Illustrated Parts Catalog

. Miscellaneous Parts

Table 3-6

Miscellaneous Parts

Item Description Spares Part Number

Miscellaneous Plastics kit : Left clutch/display wiring cover

Right clutch/microphone cover

RTC battery cover

Hard drive cover

Modem cover

Fan 316271-001

Internal AC adapter 316265-001

* Screw kit 316283-001 * Shielding kit (includes RTC battery) 316284-001 * Country kit 382757-001

Not illustrated

382728-001

3.7 Documentation

Table 3-7

Documentation

Description Spare Part Number

Illustrated Parts Map 382792-001 Maintenance and Service Guide 382793-001

Illustrated Parts Catalog 3-11

chapte

REMOVAL AND REPLACEMENT PRELIMINARIES

This chapter provides essential information for proper and safe removal and replacement service.

4.1 Tools Required

You will need the following tools to complete the removal and replacement procedures:

■ Magnetic Torx T-8 screwdriver (for all screws unless otherwise specified)

■ 7-mm hex socket (for bushing guides)

■ Tool kit, Compaq part number 100767-001 (includes connector removal tool,

loopback plugs, and case utility tool)

■ Small flat-blade screwdriver (optional)

■ Scribe

■ Tweezers

4.2 Service Considerations

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

4.2.1 Plastic Parts

Using excessive force during disassembly and reassembly can damage plastic parts. Use care when handling the plastic parts. Apply pressure only at the points designated in the maintenance instructions.

IMPORTANT: As you remove each subassembly from the computer, place it (and all

accompanying screws) away from the work area to prevent damage.

Removal and Replacement Preliminaries 4-1

4.2.2 Cables and Connectors

Cables must be handled with extreme care to avoid damage. Apply only the tension required to unseat or seat the cables during removal and insertion. Handle cables by the connector whenever possible. In all cases, avoid bending, twisting, or tearing cables. Ensure that 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 tear easily.

CAUTION: When servicing the computer, ensure that cables are placed in their

proper location during the reassembly process. Improper cable placement can damage the computer.

4.3 Preventing Damage to Removable Drives

Removable drives are fragile components that must be handled with care. To prevent damage to the computer, damage to a removable drive, or loss of information, observe these precautions:

■ Before removing or inserting a hard drive, shut down the computer. If you are

unsure whether the computer is off or in Hibernation, turn the computer on, then shut it down.

■ Before removing a diskette drive or CD-ROM drive, ensure that a diskette or disc is

not in the drive. Ensure that the CD-ROM tray is closed.

■ Before handling a drive, ensure that you are discharged of static electricity. While

handling a drive, avoid touching the connector.

■ Handle drives on surfaces that have at least one inch of shock-proof foam.

■ Avoid dropping drives from any height onto any surface.

■ Always place MultiBay drives in the carrying case when removed from the

computer.

■ Do not use excessive force when inserting a drive into the MultiBay.

■ Avoid exposing a hard drive to products that have magnetic fields such as monitors

or speakers.

■ Avoid exposing a drive to temperature extremes or to liquids.

■ If a drive must be mailed, do the following:

– Place the hard drive into a bubble pack mailer or other suitable form of

protective packaging.

– Label the package “Fragile: Handle With Care.”

4-2 Removal and Replacement Preliminaries

4.4 Preventing Electrostatic Damage

Many electronic components are sensitive to electrostatic discharge (ESD). Circuitry design and structure determine the degree of sensitivity. Networks built into many integrated circuits provide some protection, but in many cases the discharge contains enough power to alter device parameters or melt silicon junctions.

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

4.4.1 Packaging and Transporting Precautions

Use the following grounding precautions when packaging and transporting equipment:

■ To avoid hand contact, transport products in static-safe containers such as tubes,

bags, or boxes.

■ Protect all electrostatic-sensitive parts and assemblies with conductive or approved

containers or packaging.

■ Keep electrostatic-sensitive parts in their containers until they arrive at static-free

workstations.

■ Place items on a grounded surface before removing them from their container.

■ Always be properly grounded when touching a sensitive component or assembly.

■ Place reusable electrostatic-sensitive parts from assemblies in protective packaging

or non-conductive foam.

■ Use transporters and conveyers made of antistatic belts and roller bushings. Ensure

that mechanized equipment used for moving materials is wired to ground, and that proper materials were selected to avoid static charging. When grounding is not possible, use an ionizer to dissipate electric charges.

Removal and Replacement Preliminaries 4-3

4.4.2 Workstation Precautions

Use the following grounding precautions at workstations:

■ Cover the workstation with approved static-dissipative material (refer to Table 4-2

later in this chapter).

■ Use a wrist strap connected to a properly grounded work surface and use properly

grounded tools and equipment.

■ Use field service tools, such as cutters, screwdrivers, and vacuums that are

conductive.

■ When using fixtures that must directly contact dissipative surfaces, use fixtures

made of static-safe materials only.

■ Keep work area free of nonconductive materials such as ordinary plastic assembly

aids and styrofoam.

■ Handle electrostatic-sensitive components, parts, and assemblies by the case or

PCM laminate. Handle them only at static-free workstations.

■ Avoid contact with pins, leads, or circuitry.

■ Turn off power and input signals before inserting or removing connectors or test

equipment.

4.4.3 Grounding Equipment and Methods

Grounding equipment must include either a wrist strap or a foot strap at a grounded workstation.

■ When seated, wear a wrist strap connected to a grounded system. Wrist straps are

flexible straps with a minimum of one megohm ±10% resistance in the ground cords. To provide proper ground, a strap must be worn snug against the skin. On grounded mats with banana-plug connectors, connect a wrist strap with alligator clips.

■ When standing, use foot straps and a grounded floor mat. Foot straps (heel, toe, or

boot straps) can be used at standing workstations and are compatible with most types of shoes or boots. On conductive floors or dissipative floor mats, use them on both feet with a minimum of one-megohm resistance between the operator and ground. To be effective, the conductive strips must be worn in contact with the skin.

4-4 Removal and Replacement Preliminaries

Other grounding equipment recommended for use in preventing electrostatic damage include:

■ Antistatic tape

■ Antistatic smocks, aprons, or sleeve protectors

■ Conductive bins and other assembly or soldering aids

■ Non-conductive foam

■ Conductive tabletop workstations with ground cord of one-megohm resistance

■ Static-dissipative table or floor mats with hard tie to ground

■ Field service kits

■ Static awareness labels

■ Material-handling packages

■ Non-conductive plastic bags, tubes, or boxes

■ Metal tote boxes

4.4.4 Electrostatic Voltage Levels and Protective Materials

Table 4-1 shows how humidity affects the electrostatic voltage levels generated by different activities.

Table 4-1

Typical Electrostatic Voltage Levels

Relative Humidity

Event 10% 40% 55%

Walking across carpet 35,000 V 15,000 V 7,500 V Walking across vinyl floor 12,000 V 5,000 V 3,000 V Motions of bench worker 6,000 V 800 V 400 V Removing DIPS from plastic tube 2,000 V 700 V 400 V Removing DIPS from vinyl tray 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 PCB 26,500 V 20,000 V 7,000 V Packing PCBs in foam-lined box 21,000 V 11,000 V 5,000 V

NOTE: 700 volts can degrade a product.

Removal and Replacement Preliminaries 4-5

Table 4-2 lists the shielding protection provided by antistatic bags and floor mats.

Table 4-2

Static-Shielding Materials

Material Use Voltage Protection Level

Antistatic plastic Bags 1,500 V Carbon-loaded plastic Floor mats 7,500 V Metallized laminate Floor mats 15,000 V

4-6 Removal and Replacement Preliminaries

chapte

REMOVAL AND REPLACEMENT PROCEDURES

This chapter provides the removal and replacement procedures for the computer subassemblies.

5.1 Serial Number

The computer serial number should be provided to Compaq support when requesting information or ordering spare parts. The serial number 1 is located on the back of the computer (Figure 5-1).

Figure 5-1. Serial Number Location

Removal and Replacement Procedures 5-1

5.2 Disassembly Sequence

Refer to the disassembly steps before disassembling the computer. Disassemble only the components necessary to gain access to the sub-assembly you are servicing.

5.3 Preparing the Computer for Disassembly

5.3.1 Disconnecting the AC Power

5.3.2 Battery

5.3.3 MultiBay Devices

5.3.4 PCMCIA

5.4 Computer Tilt Feet

5.5 Internal Modem

5.5.1 IR (Infrared) Module

5.6 Hard Drive

5.7 Keyboard

5.7.1 Keyboard Removal

5.7.2 Memory Board

5.7.3 Lithium Real Time Clock Battery

5.7.4 Optical Disc Bay

5.8 Display Assembly

5.8.1 Hinge Covers

5.8.2 Display Assembly

5.9 Top Cover Assembly

5.9.1 DC-DC Converter and Audio Board Shield

5.9.2 DC-DC Converter

5.9.3 Audio Board

5.9.4 Fan

5.9.5 System Board

5.9.6 Integrated AC Adapter

5-2 Removal and Replacement Procedures

5.3 Preparing the Computer for Disassembly

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

1. Disconnect the modem line cord.

2. Disconnect the AC power and any external devices.

3. Remove the battery pack(s).

4. Remove the MultiBay device.

5. Remove any PC Cards.

WARNING:

internal system components to cool before touching.

To reduce the risk of personal injury from hot surfaces, allow the

5.3.1 Disconnecting the AC Power

Before beginning service procedures on the computer, remove all power from the system to prevent damage to the equipment or personal injury. Select the appropriate steps, depending on whether the computer is docked or not.

Computer is Docked

If the computer is docked in the convenience base, it must be undocked before performing additional work. Complete the following steps to undock the computer.

1. Close all applications and exit the operating system.

2. Turn off the computer.

3. Disconnect the AC power and any external cables.

4. Close the computer.

5. Pull the docking lever forward to undock the computer.

6. Lift the computer from the convenience base.

7. Remove the battery pack.

Computer is Not Docked

If the computer is not docked, perform the following steps:

1. Close all applications and exit the operating system.

2. Turn off the computer.

3. Turn off and disconnect any external devices.

4. Disconnect the AC power cord from the power source.

5. Disconnect the AC power cord from the computer.

6. Remove the battery pack.

Removal and Replacement Procedures 5-3

5.3.2 Battery Pack Removal

Remove the battery pack before beginning any internal maintenance on the computer.

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 Prosignia Notebook Computer into the battery compartment. Do not force the battery pack into the bay.

WARNING: Do not crush, puncture, or incinerate the battery pack. Do not dispose

of in water. Do not expose to temperatures higher than 60°C. Do not open a battery pack, as this damages the pack, makes it unserviceable, and exposes potentially harmful battery components. There are no field-serviceable parts located inside the battery pack.

To remove the battery pack from the computer, complete the following steps: 1 Slide the battery release latch 1.

2 Remove the battery pack.

Figure 5-2. Removing the Battery Pack

CAUTION: Installing the battery pack upside down can cause the contacts to

break.

5-4 Removal and Replacement Procedures

5.3.3 MultiBay Devices

CAUTION: The device in the MultiBay must be removed prior to performing

maintenance on the computer.

A diskette drive, an LS-120 diskette drive, a ZIP drive, a second battery pack, or a second hard drive may be installed into the MultiBay.

The device in the MultiBay must be removed prior to performing maintenance on the computer. For convenience, a diskette drive is depicted in this sequence. To remove any MultiBay device, complete the following steps:

1. If applicable, remove the security screw from the bottom side of the computer (LS120 drive and ZIP drive only).

2. Press down on the release latch 1 and grasp the tab located on the underside of the device.

3. Remove the device.

Figure 5-3. Removing the MultiBay Device

Removal and Replacement Procedures 5-5

5.3.4 PCMCIA

Remove any installed PC (PCMCIA) Cards before performing any service on the computer. To remove a PC Card, complete the following steps:

1. To release the PC Card eject button, depress the button once 1,2.

2. To eject the PC Card, firmly depress the PC Card eject button a second time.

3. Remove the card.

Figure 5-4. Removing the PC Card

5-6 Removal and Replacement Procedures

5.4 Computer Tilt Feet

There are two tilt feet on the bottom of the computer. To remove a foot, follow the steps listed.

1. Turn the computer bottom side up and position it so that the front of the unit is toward you.

2. Open the foot to the fully extended position.

3. Place a flat-blade screwdriver between the right hinge point of the foot and the unit. The tip of the blade must be under one end of the foot, immediately below the hinge point. Be careful not to mar or scratch the plastic base enclosure.

4. Press the foot toward the closed position, and simultaneously press down the handle of the screwdriver toward the table. The foot will snap out of the hinges.

Figure 5-5. Removing the Computer Tilt Feet

To replace the foot, place the left end of the hinge on the hinge point. Rotate the right end of the hinge into position over the right hinge point and press firmly. The hinge will snap into place with moderate pressure.

Removal and Replacement Procedures 5-7

5.5 Internal Modem

The internal modem is standard on some models and is attainable as an upgrade option on other models. If the model is not equipped with a modem, the modem compartment is sealed by a protective plate underneath the modem cover.

For models equipped with a modem, complete the following steps to remove the modem.

1. Prepare the computer for disassembly (Section 5.3).

2. Turn the computer bottom side up with the front of the unit toward you.

3. Remove the screw from the modem access cover.

4. Remove the modem access cover.

Figure 5-6. Removing the Modem Access Cover

5-8 Removal and Replacement Procedures

5. Remove the modem board retaining screw.

6. Carefully pull the modem board release tab and lift the modem from the computer.

Figure 5-7. Removing the Modem Board

To replace or install the modem, reverse the procedure.

NOTE: When installing the modem, be sure that the modem release tab is folded on top

of the modem before replacing the modem access door.

Removal and Replacement Procedures 5-9

5.5.1 IR (Infrared) Module

To remove the Infrared (IR) transceiver module:

1. Prepare the computer for disassembly (Section 5.3).

2. Remove the modem (Section 5.5).

3. Remove the screw from the IR module

4. Disengage the connector from the system board by lifting the corner of the IR module with a screwdriver.

5. Lift the IR module from the base enclosure.

Figure 5-8. Removing the IR Module

To install the IR module, reverse the procedure above.

NOTE: If you are replacing the base enclosure, transfer the IR module to the new

enclosure.

5-10 Removal and Replacement Procedures

5.6 Hard Drive

The hard drive is held in place with a security screw and a retaining bracket. To remove the hard drive, complete the following steps:

1. Prepare the computer for disassembly (Section 5.3).

2. Turn the computer bottom side up and position it so that the front of the unit is toward you.

3. Remove the security screw from the drive cover.

Figure 5-9. Removing the Hard Drive Cover Security Screw

Removal and Replacement Procedures 5-11

4. Slide the release latch toward the back of the computer. The cover lid springs open.

5. Slide the hard drive cover toward the front of the computer.

6. Lift the cover from the computer.

Figure 5-10. Removing the Hard Drive Cover

5-12 Removal and Replacement Procedures

7. Disengage the hard drive from the connector by sliding the hard drive toward the

front of the computer.

8. Using the lifting tab, remove the hard drive from the computer.

Figure 5-11. Removing the Hard Drive

Reverse the above procedure to install the hard drive. Be sure to place the lifting tab inside the computer before replacing the cover.

Removal and Replacement Procedures 5-13

5.7 Keyboard

To release the keyboard, complete the following procedures.

1. Prepare the computer for disassembly (Section 5.3).

2. Place the computer on the workspace with the front of the unit facing you.

3. Open the display to the vertical position.

4. To release the keyboard, insert the tip of the scribe into each of the keyboard holes, and pull the free end of the scribe towards you.

5. Slide the keyboard toward you. Be careful not to stress the keyboard cable.

Figure 5-12. Releasing the Keyboard Latches

5-14 Removal and Replacement Procedures

6. Lift the keyboard.

7. Place the keyboard in an upright position. Insert the two tabs on the right side and the tab on the left side of the keyboard into the slots provided on the right of the base enclosure.

Figure 5-13. Placing the Keyboard Tabs into the Slots in the Base

It is not necessary to completely remove the keyboard from the base enclosure to do the following service procedures:

■ Memory expansion board installation, replacement, or upgrade.

■ Lithium real-time clock battery replacement.

■ Optical disc bay replacement or upgrade.

If you need to separate the keyboard from the system base enclosure, refer to the keyboard removal section.

Removal and Replacement Procedures 5-15

5.7.1 Keyboard Removal

1. Release the latch on the keyboard ZIF connector.

2. Slide the strain relief on the flat cable toward the back of the computer, then lift the front edge of the strain relief from the recess.

3. Disconnect the keyboard ribbon cable.

4. Remove the keyboard from the computer.

Figure 5-14. Disconnecting the keyboard Ribbon Cable

To replace the keyboard, reverse the procedure above.

NOTE: To replace the strain relief, place the edge of the strain relief nearest the back of

the computer down into the recess, press the strain relief toward the rear of the computer and rotate the front edge down toward the computer.

5-16 Removal and Replacement Procedures

5.7.2 Memory Board

If a memory expansion board option has been previously installed in the computer, it must be removed before another is installed. To remove the memory board, complete the following steps:

1. Prepare the computer for disassembly (Section 5.3).

2. Lift the the keyboard as described (Section 5.7).

3. Position the keyboard upright by placing the keyboard tabs on the keyboard in the slots provided.

4. Pull out the right and left locking tabs on each end of the memory expansion board. This releases the memory board and allows it to rotate upward to ease removal.

CAUTION: If you need to remove the memory expansion board, be sure to release

the locking tabs that secure the memory board in the slot. If the tabs are not released, the connectors may break and cause irreparable damage to the system board.

Figure 5-15. Releasing the Memory Expansion Board

Removal and Replacement Procedures 5-17

5. Rotate the free edge 1 of the memory module upward.

6. At a 45 degree angle, pull the memory module 2 from the slot.

Figure 5-16. Removing the Memory Expansion Board

5-18 Removal and Replacement Procedures

To install a memory board, complete the following steps:

1. Insert the memory board 1 into the memory slot.

2. Pivot the memory board toward the computer 2 so that it lays flat in the memory

compartment.

3. Insert the memory board firmly into place to seat the connections and to engage the

locking tabs.

Figure 5-17. Installing the Memory Board

Removal and Replacement Procedures 5-19

5.7.3 Lithium Real Time Clock Battery

WARNING: There is a risk of explosion and injury if the battery is incorrectly

replaced or handled improperly. Do not attempt to recharge, disassemble, immerse in water, or dispose of it in fire. Replacement should be done using the Compaq spare part for this computer.

To remove the Lithium Real Time clock (RTC) battery, complete the following steps:

1. Prepare the computer for disassembly (Section 5.3).

2. Raise the keyboard (Section 5.7).

3. Place the tabs on the keyboard in the slots provided in the top cover.

4. Press the retaining clip 1 toward the center of the computer.

5. Lift the battery cover 2 from the computer.

Figure 5-18. Removing the RTC Battery Cover

5-20 Removal and Replacement Procedures

CAUTION: To prevent damaging the RTC battery cable, do not pull on the battery

cable.

6. Using tweezers, disconnect the RTC battery connector from the system board.

7. Remove the RTC battery.

Figure 5-19. Removing the RTC Battery

Reverse the procedure to install a replacement RTC battery.

Removal and Replacement Procedures 5-21

5.7.4 Optical Disc Bay

A CD-ROM or DVD-ROM drive can be installed in the optical disc bay. To remove a CD-ROM drive or DVD-ROM drive, complete the following steps:

1. Prepare the computer for disassembly (Section 5.3).

2. Remove the keyboard (Section 5.7).

Note: For clarity, the keyboard is shown removed from the computer. The keyboard

may be left attached to the system unit for this procedure.

3. Place the tabs on the keyboard in the slots provided in the top cover.

4. Remove the two retaining 1 screws.

5. Reach into the access opening 2 with a finger and push the drive toward the front of the computer.

6. Remove the optical disc bay drive.

Figure 5-20. Removing the Optical Bay Drive

To install a CD-ROM drive or DVD-ROM drive, reverse the procedure.

5-22 Removal and Replacement Procedures

5.8 Display Assembly

To remove the display assembly, complete the following steps:

5.8.1 Hinge Covers

1. Prepare the computer for disassembly (Section 5.3).

2. Close the cover and place the computer on the workspace top side up and position it so that the connectors on the back panel of the computer are facing you.

3. Remove the screw from each of the hinge covers.

Figure 5-21. Removing the Hinge Cover Screws

Removal and Replacement Procedures 5-23

4. Open the display fully.

5. Lift the hinge covers from the computer. Note that the right and left covers are different.

Figure 5-22. Removing the Hinge Covers

Reverse the procedure to install the hinge covers.

5-24 Removal and Replacement Procedures

5.8.2 Display Assembly

CAUTION: Do not reuse the hinge screws removed from the previously installed

display. These screws may back out of the display hinges and cause the display assembly to loosen from the base enclosure.

Important:

replacing the display or the top cover. If you are not replacing the top cover or the display assembly, complete steps 1 through 4 to remove the top cover/display assembly from the base.

To remove the display assembly, complete the following procedure:

1. Prepare the computer for disassembly (Section 5.3).

2. Remove the hinge covers (Section 5.8.1).

3. Remove the screw 1 holding the ground lugs to the left hinge clutch.

4. Separate the backlight power cable 2 and the display data cable 3 from the system board. Use a small flat-tipped screwdriver or other instrument to lift the connectors free of the system board.

It is not necessary to separate the display and the top cover unless you are

Figure 5-23. Disconnecting the Display Cables

NOTE: Do not pull the connector by the wires from the socket. The wires will be

damaged, rendering the display inoperative.

Removal and Replacement Procedures 5-25

5. Close the display.

6. Remove the remaining screw from the left display clutch and the two screws from the right display clutch.

7. Lift the display assembly from the base enclosure.

Figure 5-24. Removing the Display Assembly

Reverse the procedure to replace the display assembly.

CAUTION: To avoid damaging the display, attach the ground cable before

attaching the display cables when replacing the display assembly.

Always replace the four loctite screws with the replacement screws supplied in

Note:

the service kit.

5-26 Removal and Replacement Procedures

5.9 Top Cover Assembly

To remove the top cover assembly, complete the following procedures:

1. Prepare the computer for disassembly (Section 5.3).

2. Remove the keyboard (Section 5.7).

3. Remove the optical disc bay device (Section 5.7.4).

4. Remove the RTC battery (Section 5.7.3).

5. Complete steps 1 through 4 of the display assembly removal procedure (Section

5.8).

6. Remove the seven (7) screws holding the top and bottom of the base enclosure together.

Figure 5-25. Removing the Top Cover Assembly Screws from the Bottom of the Unit

Removal and Replacement Procedures 5-27

7. Remove the three (3) top cover screws from the back of the system unit.

Figure 5-26. Removing the Top Cover Assembly Screws from the Back of the Unit

CAUTION: Do not use the attached wiring to pull the connectors out of the

sockets. This will damage the wire and render the top cover unusable.

5-28 Removal and Replacement Procedures

8. Disconnect the speaker1,2, touchpad3, indicator4, and switch5 cables from the system board. Use the tweezers to release the connectors from the sockets.

Figure 5-27. Disconnecting the Speakers, Touchpad, Indicator, and Switch Cables from the System Board

Removal and Replacement Procedures 5-29

Compaq prosignia schematic

Specifications and Main Features

Frequently Asked Questions

User Manual

Prosignia Notebook Family of Personal Computers

CONTENTS

Using This Guide vii