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.
Copyright 1994 Compaq Computer Corporation.
All rights reserved. Printed in the USA.
Compaq, Deskpro, LTE, Contura
Registered U.S. Patent and Trademark Office.
Contura Aero is a trademark of Compaq Computer Corporation.
The software described in this guide is furnished under a license agreement
or nondisclosure agreement. The software may be used or copied only in
accordance with the terms of the agreement.
Product names mentioned herein may be trademarks and/or registered
trademarks of their respective companies.
MAINTENANCE AND SERVICE GUIDE
Compaq Contura Aero Family of Personal Computers
First Edition (February 1994)
Part Number 197235-001
Page 2
Preface
This Maintenance and Service Guide is used for reference when servicing the
Compaq Contura Aero Family of Personal Computers.Additional information
is available in the following publications:
o Compaq Contura Aero Documentation:
- QUICK SETUP
- BEYOND SETUP
- Online USER'S GUIDE
o COMPAQ SERVICE QUICK REFERENCE GUIDE
o Service Training Guides
o Compaq Service Advisories and Bulletins
Compaq Computer Corporation reserves the right to make changes to the
Compaq Contura Aero Family of Personal Computers without notice.
Symbols
The following words and symbols mark special messages throughout this
guide:
Only authorized technicians trained by Compaq should repair this equipment.
All troubleshooting and repair procedures are detailed to allow only
subassembly/module level repair.Because of the complexity of the
individual boards and subassemblies, no one should attempt to make repairs
at the component level or to make modifications to any printed circuit
board. Improper repairs can create a safety hazard. Any indications of
component replacement or printed circuit board modifications may void any
warranty.
Chapter 1.1 Illustrated Parts Breakdown: Compaq Contura Aero Family Of Personal Computers
The Compaq Contura Aero Family of Personal Computers joins a display
assembly and system unit together with a clutch secured by screws in the
chassis, display enclosure, and a display pin allowing it to open and
close. The display assembly is secured by screws installed in the front of
the display enclosure.The system unit is secured to the system unit
enclosure by screwlocks in the rear and screws in the bottom of the system
unit enclosure.
SYSTEM UNIT MODULE DESCRIPTION
The system unit (Figure 1-4) includes the following replaceable parts:
o Battery and spacer
o Base enclosure
o Keyboard
o Hard drive
o Power supply
Page 4
o PCMCIA ejector rails
o Trackball assembly
o Memory expansion board (optional)
o System board
The keyboard is secured to the system unit with four screws and a hook
latch in the front. Once the screws are removed, the keyboard must be
rotated from the rear forward to disengage it from the hook latch. The
keyboard must be removed to allow access to any of the system board
components. The keyboard is connected to the system board with two ribbon
cables and zero insertion force (ZIF) connectors. The cables do not
necessarily have to be disconnected to service the system board. The
keyboard may be laid on top of the battery compartment to access the system
board.
The hard drive is connected directly to the system board with no
intervening cables. It is mounted to the chassis with a hard drive bracket.
The hard drive bracket is secured to the hard drive with three screws.
The power supply is secured to the system board with one threaded standoff.
There is no cable between the power supply and the system board; the power
supply connects directly to the system board.
The trackball assembly consists of the trackball, buttons, flex cable, and
speaker. The trackball plugs directly into the cable with a low insertion
force (LIF) connector and mounts with two screws in the right front corner
of the base enclosure. The flex cable includes the buttons and speaker. The
buttons fit in a recessed area on the right side of the base enclosure and
control the functions of the trackball. The speaker is connected to the
flex cable with two wires and fits in a narrow area in the right front
corner of the base enclosure.Sound is directed through the enclosure. The
remainder of the flex cable is routed behind and over the hard drive
assembly and plugs with a LIF connector directly into the system board.
The system board is mounted directly to the chassis. All system module
components connected to the system board must be removed prior to removing
the system board.
The PCMCIA rails are secured to the system board header with two screws at
the top. The rails plug directly into the system board connector.
The memory expansion board plugs into the system board in the bottom of the
base enclosure. Remove the door, and the memory expansion board plugs into
a single connector. System memory can be increased to a maximum 12 MB by
adding an 8 MB Memory Expansion Board. A 4 MB Memory Expansion Board is
also available.
DISPLAY ASSEMBLY MODULE DESCRIPTION
The display assembly (Figures 1-5 and 1-6) includes the following
replaceable parts:
o Display bezel
o Liquid crystal display (LCD) panel
o Display inverter board
o Display cable
o Display shield
o Display enclosure
Page 5
Compaq Contura Aero 4/25
The display assembly is secured with two screws in the bottom corners of
the display bezel and by a screw in a clutch and a pin to the base
enclosure.To remove the display assembly from the base enclosure, the
display bezel must be removed first. Then the CPU cover is removed to allow
access to the system board.
The monochrome LCD is secured to the display enclosure with two screws in
the top left corner and one screw in the top right corner.The bottom
right corner has two small cables attached to a connector for the backlight
and the inverter board.
The display cable is a flex cable plugged into a connector on the left side
of the LCD, folded, and secured to the display shield with a pressure
sensitive adhesive.One end of the display cable is exposed at the bottom
of the display enclosure and is connected to the system board with a zero
insertion force (ZIF) slider. The other end is connected with a low
insertion force (LIF) connector to the display inverter board.
The display inverter board is aligned in the bottom of the display
enclosure with pins. One end connects to the display cable; the other end
plugs into the backlight cable of the LCD panel and is held in place with
pressure sensitive adhesive tape.
The display shield lays in the display enclosure.
Compaq Contura Aero 4/33C
The display assembly is secured with two screws in the bottom corners of
the display bezel and by a screw in a clutch and a pin to the base
enclosure.To remove the display assembly from the base enclosure, the
display bezel must be removed first. Then the CPU cover is removed to allow
access to the system board.
The color LCD is secured to the display enclosure with four screws in the
corners of the LCD panel. The top right corner has two small cables
attached to a connector for the backlight and the inverter board.
The display cable is a flex cable plugged into a ZIF connector on the left
side of the LCD, folded, and secured to the display shield with a pressure
sensitive adhesive. One end of the display cable is exposed at the bottom
of the display enclosure and is connected to the system board with a ZIF
connector. The other end plugs into a LIF connector on the display inverter
board in the lower right hand corner of the display enclosure.
The display inverter board is aligned on the right side of the display
enclosure and mounted component side down. One end connects to the display
cable; the other end plugs into the backlight cable of the LCD panel.
The display shield lays in the display enclosure and has tabs that bend
over the screw holes of the LCD and secure the display shield to the LCD.
Page 6
Page 7
Chapter 1.2 System Unit Module
Page 8
Table 1-1. System Unit
===========================================================================
DescriptionSpare Part No.Notes
===========================================================================
1Base enclosure197253-001Includes screw covers.
--------------------------------------------------------------------------2System board, 4 MBDoes not include PCMCIA ejector
* Not Shown
===========================================================================
Page 12
Chapter 1.4 Keyboards
Table 1-4. Notebook Keyboards
===========================================================================
DescriptionSpare Part Number
===========================================================================
* Not Shown
===========================================================================
Table 1-5. Enhanced Keyboards
Page 13
===========================================================================
DescriptionSpare Part Number
===========================================================================
1Enhanced II Keyboard U.S.112573-001 (No longer
available)*
2Enhanced III Keyboard U.K.140536-103 *
3Enhanced III Keyboard German140536-104 *
4Enhanced III Keyboard French140536-105 *
5Enhanced III Keyboard Italian140536-106 *
6Enhanced III Keyboard Spanish140536-107 *
7Enhanced III Keyboard Danish140536-108 *
8Enhanced III Keyboard Norwegian140536-109 *
9Enhanced III Keyboard Swedish/Finnish140536-110 *
10Enhanced III Keyboard Swiss140536-111 *
11Enhanced III Keyboard French Canadian140536-112 *
12Enhanced III Keyboard Portuguese140536-113 *
13Enhanced III Keyboard Turkish140536-114 *
14Enhanced III Keyboard Greek140536-115 *
15Enhanced III Keyboard Latin American140536-116 *
16Enhanced III Keyboard Arabic140536-117 *
17Enhanced III Keyboard Belgian140536-118 *
18Enhanced III Keyboard Japanese140536-119 *
19Enhanced III Keyboard BHCSY **140536-120 *
20Enhanced III Keyboard Hungarian140536-121 *
21Enhanced III Keyboard Polish140536-122 *
22Enhanced III Keyboard Slovakian140536-123 *
23Enhanced III Keyboard Russian140536-124 *
24Enhanced III Keyboard Czech140536-129 *
25Enhanced III Keyboard Thai140536-130 *
--------------------------------------------------------------------------*Not Shown
** Bosnia-Herzegovina, Croatia, Slovenia, and Yugoslavia
===========================================================================
Table 1-7. AC Adapter and Power Cord
===========================================================================
DescriptionSpare Part Number
===========================================================================
1AC Adapter190621-001
2Power Cord (U.S./Canada)197230-001
3Power Cord (U.K.)197232-001 *
4Power Cord (Europe)197231-001 *
5Power Cord (Japan)197233-001 *
6Power Cord (Asia Pacific)197234-001 *
--------------------------------------------------------------------------* Not shown
===========================================================================
Table 1-8. Documentation and Software
===========================================================================
DescriptionSpare Part Number
===========================================================================
MAINTENANCE AND SERVICE GUIDE197235-001
Table 1-9. Accessories
===========================================================================
DescriptionSpare Part Number
===========================================================================
Automobile adapter190551-001
Table 1-10. Mounting Hardware
===========================================================================
DescriptionSpare Part Number
===========================================================================
Kit, CPU base screws and screwlocks197315-001
Table 1-11b. Fastener List for the Compaq Contura Aero 4/25 Display
===========================================================================
DescriptionTypeWhere UsedPart NumberDriveQty
===========================================================================
M2.0 x 4.0TrussPin144863-001T8/SL2
M2.5 x 4.5TrussClutch144864-001T8/SL2
M2.0 x 6.0PanBezel197341-002PH/12
M2.0 x 2.5TrussPanel to enclosure144863-002T8/SL3
===========================================================================
Table 1-11c. Fastener List for the Compaq Contura Aero 4/33C Display
===========================================================================
DescriptionTypeWhere UsedPart NumberDriveQty
===========================================================================
M2.0 x 4.0TrussPin and inverter board144863-001T8/SL2
M2.5 x 4.5TrussClutch144864-001T8/SL2
M2.0 x 6.0PanBezel197341-002PH/12
M3.0 x 6.0TrussPanel to enclosure198889-001T8/SL4
===========================================================================
Table 1-12. Miscellaneous Kits
===========================================================================
DescriptionSpare Part Number
===========================================================================
Base unit tilt feet197346-001
A sudden discharge of static electricity from a finger or other conductor
can destroy static sensitive devices or micro circuitry. Often the spark is
neither felt or heard, but damage occurs. An electronic device exposed to
electrostatic discharge (ESD) may not be affected at all and will work
perfectly throughout a normal cycle. Or it may function normally for a
while, then degrade in the internal layers, reducing its life expectancy.
Networks built into many integrated circuits provide some protection, but
in many cases, the discharge contains enough power to alter device
parameters or melt silicon junctions.
Generating Static
Table 2-1 shows how different activities generate static electricity and at
different electrostatic voltage levels.
Event10%40%55%
===========================================================================
Walking across carpet35,000V15,000V7,500V
Relative Humidity
Walking across vinyl floor12,000V5,000V3,000V
Motions of bench worker6,000V800V400V
Removing DIPS from plastic tubes2,000V700V400V
Removing DIPS from vinyl trays11,500V4,000V2,000V
Removing DIPS from styrofoam14,500V5,000V3,500V
Removing bubble pack from PCBs26,000V20,000V7,000V
Packing PCBs in foam lined box21,000V11,000V5,000V
--------------------------------------------------------------------------NOTE: 700 volts can degrade a product.
===========================================================================
Preventing Electrostatic Damage To Equipment
Many electronic components are sensitive to ESD. Circuitry design and
Page 20
structure determine the degree of sensitivity. The following proper
packaging and grounding precautions are necessary to prevent damage:
o Protect all electrostatic parts and assemblies with conductive or
approved containers or packaging.
o Keep electrostatic sensitive parts in their containers until they arrive
at static free stations.
o Place items on a grounded surface before removing them from their
container.
o Always be properly grounded when touching a sensitive component or
assembly.
o Place reusable electronic sensitive parts from assemblies in protective
packaging or conductive foam.
Use transporters and conveyors made of antistatic belts and metal roller
bushings. Mechanized equipment used for moving materials must be wired to
ground and proper materials selected to avoid static charging.When
grounding is not possible, use an ionizer to dissipate electric charges.
Preventing Damage to Drives
To prevent static damage to hard drives, use the following precautions:
o Handle drives gently, using static guarding techniques.
o Store drives in the original shipping containers.
o Avoid dropping drives from any height onto any surface.
o Handle drives on surfaces that have at least one inch of shock proof
foam.
o Always place drives PCB assembly side down on the foam.
Grounding Methods
The method for grounding must include a wrist strap or a foot strap at a
grounded workstation. When seated, wear a wrist strap connected to a
grounded system. When standing, use footstraps and a grounded floor mat.
To prevent static damage at the workstation, use the following precautions:
o Cover the workstation with approved static dissipative material. Provide
a wrist strap connected to the work surface and properly grounded tools
and equipment.
o Use static dissipative mats, heel straps, or air ionizers to give added
protection.
o Handle electrostatic sensitive components, parts, and assemblies by the
case or PCB laminate. Handle them only at static free workstations.
o Avoid contact with pins, leads, or circuitry.
o Turn off power and input signals before inserting and removing connectors
or test equipment.
o Use fixtures made of static safe materials when fixtures must directly
contact dissipative surfaces.
o Keep work area free of nonconductive materials such as ordinary plastic
assembly aids and Styrofoam.
o Use field service tools, such as cutters, screwdrivers, vacuums, that are
conductive.
o Use a portable field service kit with a static dissipative vinyl pouch
that folds out of a work mat.Also use a wrist strap and a ground cord
for the work surface. Ground the cord to the chassis of the equipment
undergoing test or repair.
Grounding Equipment
Use the following equipment to prevent static electricity damage to the
equipment:
Wrist Straps are flexible straps with a minimum of 1 megohm +/- 10%
resistance to the ground cords. To provide proper ground, a strap must be
worn snug against the skin. On grounded mats without banana plug
connectors, connect a wrist strap with alligator clips.
Heelstraps/Toestraps/Bootstraps can be used at standing workstations and
are compatible with most types of boots and shoes. On conductive floors or
dissipative floor mats, use them on both feet with a minimum of 1 megohm
resistance between operator and ground. To be effective, the conductive
strips must be worn in contact with the skin.
Recommended Materials and Equipment
Other materials and equipment that are recommended for use in preventing
static electricity include:
o Antistatic tape
o Antistatic smocks, aprons, or sleeve protectors
Page 22
o Conductive bins, and other assembly or soldering aids
o Conductive foam
o Conductive table top workstations with ground cord of 1 megohm of
resistance
o Static dissipative table or floor mats with hard tie to ground
o Field service kits
o Static awareness labels
o Wrist straps and footwear straps providing 1 megohm +/- 10% resistance
o Material handling packages
o Conductive plastic bags
o Conductive plastic tubes
o Conductive tote boxes
o Metal tote boxes
o Opaque shielding bags
o Transparent metallized shielding bags
o Transparent shielding tubes
SERVICE CONSIDERATIONS
Listed below are some of the considerations that should be kept in mind
during the disassembly and assembly of the computer.
Tool Requirements:
o Flat bladed screwdriver
o Torx T8 screwdriver (included in 130619-001)
o Hex socket driver (3/16)
o 25 Pin printer loopback plug (included in 100767-001)
o 9 Pin serial loopback plug (included in 100767-001)
o Cross recess (Phillips) screwdriver (included in 130619-001)
o Trackball tool (spare part number 194041-001)
o Case utility tool (spare part number 119070-001 and included in
10076-001)
o PCMCIA external diskette drive (part number 190533-001)
o Preloaded application diskettes
Page 23
Screws
The screws used in these products are not interchangeable. If an incorrect
screw is used during the reassembly process, it could cause damage to the
unit. Compaq strongly recommends that all screws removed during the
disassembly process be kept with the part that was removed, then returned
to their proper locations.
IMPORTANT: As each subassembly is removed from the computer, it should be
placed away from the work area to prevent damage.
Cables and Connectors
Most cables used throughout the unit are flex cables (Figures 2-1, 2-2,
2-3). These cables must be handled with extreme care to avoid damage. Apply
only the tension required to seat or unseat the cables during insertion or
removal from the connector. Handle cables by the connector or pull tabs
whenever possible. In all cases, avoid bending, twisting, or tearing the
cables, and ensure that cables are placed in such a way that they cannot be
caught or snagged by parts being removed or replaced.
When servicing these units, ensure that cables are placed in their proper
location during the reassembly process.Improper cable placement can cause
severe damage to the unit.
The plastics used can be damaged by application of excessive force during
disassembly and reassembly. When handling the plastic cases and housing
assemblies, use care. Do not use screwdrivers or similar tools to pry apart
plastics.Where necessary, use the Case utility tool (spare part number
119070-001).Proper handling of this tool is illustrated in the
disassembly and reassembly procedures.
Disposal of a Used Battery
Battery components are considered environmentally harmful. Disposal of a
Nickel Metal Hydride (NiMH) Battery Pack should comply with country, state,
province, or local regulations.Whenever possible, battery components
should be recycled.
Never attempt to open or service a battery pack. Opening a battery pack not
only damages the pack and makes it unusable, but also exposes potentially
harmful battery components.
Chapter 2.1 Electrostatic Discharge (U.S. and Canada
Page 27
A sudden discharge of static electricity from a finger or other conductor
can destroy static sensitive devices or micro circuitry. Often the spark is
neither felt or heard, but damage occurs. An electronic device exposed to
electrostatic discharge (ESD) may not be affected at all and will work
perfectly throughout a normal cycle. Or it may function normally for a
while, then degrade in the internal layers, reducing its life expectancy.
Networks built into many integrated circuits provide some protection, but
in many cases, the discharge contains enough power to alter device
parameters or melt silicon junctions.
Generating Static
Table 2-1 shows how different activities generate static electricity and at
different electrostatic voltage levels.
Event10%40%55%
===========================================================================
Walking across carpet35,000V15,000V7,500V
Walking across vinyl floor12,000V5,000V3,000V
Motions of bench worker6,000V800V400V
Removing DIPS from plastic tubes2,000V700V400V
Removing DIPS from vinyl trays11,500V4,000V2,000V
Removing DIPS from styrofoam14,500V5,000V3,500V
Removing bubble pack from PCBs26,000V20,000V7,000V
Packing PCBs in foam lined box21,000V11,000V5,000V
--------------------------------------------------------------------------NOTE: 700 volts can degrade a product.
===========================================================================
Preventing Electrostatic Damage To Equipment
Many electronic components are sensitive to ESD. Circuitry design and
structure determine the degree of sensitivity. The following proper
packaging and grounding precautions are necessary to prevent damage:
o Protect all electrostatic parts and assemblies with conductive or
approved containers or packaging.
o Keep electrostatic sensitive parts in their containers until they arrive
at static free stations.
o Place items on a grounded surface before removing them from their
container.
o Always be properly grounded when touching a sensitive component or
assembly.
Page 28
o Place reusable electronic sensitive parts from assemblies in protective
packaging or conductive foam.
Use transporters and conveyors made of antistatic belts and metal roller
bushings. Mechanized equipment used for moving materials must be wired to
ground and proper materials selected to avoid static charging.When
grounding is not possible, use an ionizer to dissipate electric charges.
Preventing Damage to Drives
To prevent static damage to hard drives, use the following precautions:
o Handle drives gently, using static guarding techniques.
o Store drives in the original shipping containers.
o Avoid dropping drives from any height onto any surface.
o Handle drives on surfaces that have at least one inch of shock proof
foam.
o Always place drives PCB assembly side down on the foam.
Grounding Methods
The method for grounding must include a wrist strap or a foot strap at a
grounded workstation. When seated, wear a wrist strap connected to a
grounded system. When standing, use footstraps and a grounded floor mat.
To prevent static damage at the workstation, use the following precautions:
o Cover the workstation with approved static dissipative material. Provide
a wrist strap connected to the work surface and properly grounded tools
and equipment.
o Use static dissipative mats, heel straps, or air ionizers to give added
protection.
o Handle electrostatic sensitive components, parts, and assemblies by the
case or PCB laminate. Handle them only at static free workstations.
o Avoid contact with pins, leads, or circuitry.
Page 29
o Turn off power and input signals before inserting and removing connectors
or test equipment.
o Use fixtures made of static safe materials when fixtures must directly
contact dissipative surfaces.
o Keep work area free of nonconductive materials such as ordinary plastic
assembly aids and Styrofoam.
o Use field service tools, such as cutters, screwdrivers, vacuums, that are
conductive.
o Use a portable field service kit with a static dissipative vinyl pouch
that folds out of a work mat.Also use a wrist strap and a ground cord
for the work surface. Ground the cord to the chassis of the equipment
undergoing test or repair.
Grounding Equipment
Use the following equipment to prevent static electricity damage to the
equipment:
Wrist Straps are flexible straps with a minimum of 1 megohm +/- 10%
resistance to the ground cords. To provide proper ground, a strap must be
worn snug against the skin. On grounded mats without banana plug
connectors, connect a wrist strap with alligator clips.
Heelstraps/Toestraps/Bootstraps can be used at standing workstations and
are compatible with most types of boots and shoes. On conductive floors or
dissipative floor mats, use them on both feet with a minimum of 1 megohm
resistance between operator and ground. To be effective, the conductive
strips must be worn in contact with the skin.
Recommended Materials and Equipment
Other materials and equipment that are recommended for use in preventing
static electricity include:
o Antistatic tape
o Antistatic smocks, aprons, or sleeve protectors
o Conductive bins, and other assembly or soldering aids
o Conductive foam
o Conductive table top workstations with ground cord of 1 megohm of
resistance
o Static dissipative table or floor mats with hard tie to ground
o Field service kits
o Static awareness labels
o Wrist straps and footwear straps providing 1 megohm +/- 10% resistance
Page 30
o Material handling packages
o Conductive plastic bags
o Conductive plastic tubes
o Conductive tote boxes
o Metal tote boxes
o Opaque shielding bags
o Transparent metallized shielding bags
o Transparent shielding tubes
SERVICE CONSIDERATIONS
Listed below are some of the considerations that should be kept in mind
during the disassembly and assembly of the computer.
Tool Requirements:
o Flat bladed screwdriver
o Torx T8 screwdriver (included in 130619-001)
o Hex socket driver (3/16)
o 25 Pin printer loopback plug (included in 100767-001)
o 9 Pin serial loopback plug (included in 100767-001)
o Cross recess (Phillips) screwdriver (included in 130619-001)
o Trackball tool (spare part number 194041-001)
o Case utility tool (spare part number 119070-001 and included in
10076-001)
o PCMCIA external diskette drive (part number 190533-001)
o Preloaded application diskettes (Compaq Order Center, 1-800-952-7689)
Screws
The screws used in these products are not interchangeable. If an incorrect
screw is used during the reassembly process, it could cause damage to the
unit. Compaq strongly recommends that all screws removed during the
disassembly process be kept with the part that was removed, then returned
to their proper locations.
IMPORTANT: As each subassembly is removed from the computer, it should be
placed away from the work area to prevent damage.
Page 31
Cables and Connectors
Most cables used throughout the unit are flex cables (Figures 2-1, 2-2,
2-3). These cables must be handled with extreme care to avoid damage. Apply
only the tension required to seat or unseat the cables during insertion or
removal from the connector. Handle cables by the connector or pull tabs
whenever possible. In all cases, avoid bending, twisting, or tearing the
cables, and ensure that cables are placed in such a way that they cannot be
caught or snagged by parts being removed or replaced.
When servicing these units, ensure that cables are placed in their proper
location during the reassembly process.Improper cable placement can cause
severe damage to the unit.
The plastics used can be damaged by application of excessive force during
disassembly and reassembly. When handling the plastic cases and housing
assemblies, use care. Do not use screwdrivers or similar tools to pry apart
plastics.Where necessary, use the Case utility tool (spare part number
119070-001).Proper handling of this tool is illustrated in the
disassembly and reassembly procedures.
Disposal of a Used Battery
Battery components are considered environmentally harmful. Disposal of a
Nickel Metal Hydride (NiMH) Battery Pack should comply with country, state,
province, or local regulations.Whenever possible, battery components
should be recycled.
Never attempt to open or service a battery pack. Opening a battery pack not
only damages the pack and makes it unusable, but also exposes potentially
harmful battery components.
Compaq offers its portable product customers an environmentally sound
method for disposing of depleted Compaq rechargeable battery packs used in
Compaq laptop and subnotebook personal computers.
Page 34
In the interest of our customers and the protection of our environment,
Compaq has initiated a disposal/recycling program for these battery packs.
Further, because Compaq is funding all costs associated with the program,
it is offered at no cost to the Compaq laptop and notebook customer.
IMPORTANT: Toll Free Number (U.S) 1-800-524-9859, (Canada) 1-800-263-5868
Customers in North America can take advantage of this program immediately.
If you want to safely dispose of a depleted Compaq rechargeable battery
pack, call the Compaq toll free telephone number. A recorded message asks
you to provide your name, mailing address, and information about the
battery pack. Within approximately two to three weeks, Compaq will send a
postage paid "battery mailer" envelope preaddressed to the reclamation
facility. Place the Compaq rechargeable battery pack into the battery
mailer and mail it to the Compaq address shown on the mailer. Do not return
Compaq rechargeable battery packs to Authorized Compaq Service Providers
(except in the case of service or warranty exchanges) nor to any Compaq
address other than the address on the preaddressed battery mailer envelope.
Page 35
Chapter 3. Removal and Replacement Procedures
Chapter 3.0 Introduction
This chapter provides subassembly/module level removal and replacement
procedures for the Compaq Contura Aero Family of Personal Computers.
After completing all necessary removal and replacement procedures, run the
diagnostics program to verify that all components operate properly.
Chapter 3.1 Replacement Procedures
For replacement procedures, follow the removal procedures in this chapter
in reverse order.
Chapter 3.2 Disassembly/Assembly Sequence Chart
This section provides instructions for removing and replacing these
components:
Metal objects will damage the battery pack as well as the connectors in the
compartment. To prevent damage, do not let metal objects touch any of the
connectors. Do not place any objects other than the battery pack in the
battery compartment.
6. Lift the display assembly out of the computer by sliding it to the right
to pull the display pin out of the support loop. (Figure 3-13).
Page 48
To replace the display assembly, follow these steps:
1. Position the display assembly by aligning the display clutch and pin
with the support loop and keyed bushing (Figure 3-14).
Page 49
2. Reattach the screw to the base enclosure and clutch.
To reconnect the display cable to the system board, follow these steps
(Figure 3-15):
1. Insert the display cable into the ZIF connector and lightly press the
slider down to lock the connector.
2. Push the curved portion of the display cable inward with your finger,
remove your finger, close the computer, and immediately reopen.
The display cable should pop into place around the hinge forming an "S"
shape.
Page 50
Display Inverter Board
To remove the display inverter board, follow these steps:
1. Remove the display bezel (Figures 3-5 and 3-6).
2. Remove the display cable and the backlight cable from the display
inverter board in the bottom of the display enclosure by gently pulling
the cables toward you, then unplugging from the inverter board LIF
connector (Figure 3-16).
Page 51
3. Lift the inverter board out of the display enclosure (Figure 3-17).
When servicing these units, ensure that cables are placed in their proper
location to avoid pinching during the reassembly process.Improper cable
placement can cause severe damage to the unit.
These steps must be followed whenever replacing any component in the
display assembly because of high susceptibility to electrostatic discharge,
which will damage the LCD panel.
When servicing these subassemblies, ensure that cables are placed in their
proper location to avoid pinching during the reassembly process.Improper
cable placement can cause severe damage to the computer.
Because of high susceptibility to electrostatic discharge that will damage
the LCD panel, these steps must be followed whenever replacing any
component in the display assembly.
Before removing the CPU cover, be sure the AC Adapter is unplugged and the
battery pack is removed from the battery compartment. If the battery pack
remains in the battery compartment, it will damage the power supply.
Before you can remove the system board, you must remove the optional memory
expansion board, optional base unit, and the optional PCMCIA external
drive, if applicable.
To remove the system board, follow these steps:
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1. Remove the battery pack (Section 3.4).
2. Remove the display bezel (Figures 3-5 and 3-6)
3. Remove the CPU cover (Section 3.5).
4. Remove the keyboard (Section 3.6).
5. Remove the power supply (Section 3.8).
6. Remove the trackball (Section 3.9).
7. Remove the hard drive (Section 3.10).
8. Using a hex socket driver, remove the six screw locks from the rear of
the computer that secure the connectors to the chassis (Figure 3-46).
9. Open the computer and remove the two remaining standoffs from the system
board with a hex socket driver (Figure 3-47).
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10. Remove the two Phillips screws from the PCMCIA rails (Figure 3-48).
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11. Remove the three remaining screws from the system board (Figure 3-49).
NOTE: An insulator must be present under the center screw. If the insulator
is not present, order a new system board.
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12. Rotate the system board out of the system chassis (Figure 3-50).
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13. Slide the PCMCIA rails out of the system board (Figure 3-51).
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To replace the system board, reverse the previous steps.
Real Time Clock Battery
To remove the real time clock battery, follow these steps:
1. Remove the display bezel (Figures 3-5 and 3-6).
2. Remove the CPU cover (Section 3.5).
3. Remove the keyboard (Section 3.6).
4. Remove the real time clock battery from the system board by inserting a
nonconductive probe into the battery holder and pushing back on the
battery to release it (Figure 3-52).
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To replace the real time clock battery, reverse the previous steps.
Chapter 3.12 Removing The Chassis
To remove the system chassis, follow these steps:
1. Remove the battery pack (Section 3.4).
2. Remove the display bezel (Figures 3-5 and 3-6).
3. Remove the CPU cover (Section 3.5).
4. Remove the keyboard (Section 3.6).
5. Remove the VGA backlit display.
6. Remove the power supply (Section 3.8).
7. Remove the trackball (Section 3.9).
8. Remove the hard drive (Section 3.10).
9. Remove the system board (Section 3.10).
10. Remove the system chassis by gently separating it from the computer
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base and lifting it out (Figure 3-53).
To replace the system chassis, reverse the previous steps.
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Chapter 4. Power On Self Test (POST)
Chapter 4.0 Introduction
This section lists the assemblies checked by the Power On Self Test (POST).
The section also includes procedures for clearing the power on password.
Chapter 4.1 POST
POST is a series of diagnostic tests that run automatically when the system
is turned on. POST checks the following assemblies to ensure that the
computer system is functioning properly:
o Keyboard
o Power supply
o System board
o System memory
o Memory expansion board
o Controller circuitry
o VGA display
o Hard drive
POST also detects the type of mass storage device installed in the
computer.If POST finds an error in the system, an error condition is
indicated by an audible and/or visual message. Refer to Chapter 5, "Error
Messages and Codes," for more information about the error codes and a
recommended course of action.
Chapter 4.2 Preliminary Steps
If you encounter an error condition, complete the following steps before
starting troubleshooting procedures:
1. Turn off the computer by holding down the FN key and pressing the power
button.Do not remove the battery pack.
2. Remove the computer from the base unit, if applicable. Connect the AC
Adapter. Connect the printer if you want to test it or use it to log
error messages.
3. Install all appropriate loopback plugs and terminating plugs for
complete testing.
4. Turn on the computer by pressing the power button.
5. Clear the power on password, if preset by the user.
You will know that the power on password is set when a key icon (o--m)
appears on the screen when POST completes. If this occurs, you must
enter the password to continue.If you enter the password incorrectly,
a broken key icon (o-x-m) is displayed. Try again. After three
unsuccessful tries, you must turn off the computer, then on again before
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you can continue. To delete the password, type the current password
immediately followed by a backslash (\) and press the Enter key.
NOTE: If you don't have access to the power on password, you must
disable the power on password by removing the real time clock
battery.Refer to section 3.11, "Real Time Clock Battery," for
removal procedures.Once the real time clock battery is removed,
short the real time clock battery terminals in the processor board
by touching the battery terminals with two ends of a wire. Replace
all components, and resume POST.
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Chapter 5. Error Messages and Codes
Chapter 5.0 Introduction
This chapter contains Power On Self Test (POST) messages, Diagnostic error
codes, and memory error codes.
The messages and codes appear in tables that include a description of the
error, the probable cause, and the recommended action that should be taken
to resolve the error condition.
Chapter 5.1 Power On Self Test Messages
An error message results if a problem is encountered from the Power On Self
Test utility.This utility runs automatically when the system is turned
on.
Table 5-1 lists the messages for POST, the audible (beep) message, probable
cause, and recommended action.
Table 5-1. Power On Self Test Messages
===========================================================================
Message:101 ROM Error
Beeps:1 Long, 1 Short (Beeps can be disabled by the user from
Diagnostic error codes occur if the system recognizes a problem while
running the Computer Checkup (TEST). These error codes help identify
possible defective subassemblies.
Tables 5-2 through 5-15 list possible error codes, a description of the
error condition, and the action required to resolve the error condition.
IMPORTANT: Retest the system after completing each step. If the problem has
been resolved, do not proceed with the remaining steps.
For assistance in the removal and replacement of a particular subassembly,
see Chapter 3, "Removal and Replacement Procedures."
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