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Notice
Preface
Product Description
Troubleshooting
Illustrated P arts Catalog
Removal & Repair Procedures
Specifications
Connector P in Assignments
Battery P ack
Welcome to the Presario 1600 Series Portable ComputerMaintenance & Service Guide. This online guide isdesigned to serve the needs of those whose job it is to
repair Compaq products. Many of the components of the hardcopy MSG are contained in this online guide. TheNotice , contains the copyright and trademarkinformation. The Preface shows symbol conventions andTechnician Notes.
This MSG will be periodically maintained and updatedonline as needed.
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Notice
The information in this guide is subject to change without notice.
COMPAQ COMPUTER CORPORATION SHALL NOT BE LIABLE FOR TECHNICALOR EDITORIAL ERRORS OR OMISSIONS CONTAINED HEREIN, NOR FORINCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM THE
FURNISHING, PERFORMANCE, OR USE OF THIS MATERIAL.This guide contains information protected by copyright. No part of this guidemay be photocopied or reproduced in any form without prior written consentfrom Compaq Computer Corporation.
1998 Compaq Computer Corporation.All rights reserved. Printed in the U.S.A.
Compaq, Presario Registered U. S. Patent and Trademark Office.
Microsoft, MS-DOS, and Windows are registered trademarks of Microsoft
Corporation.Windows 95 is a trademark of Microsoft Corporation.
The software described in this guide is furnished under a license agreement ornondisclosure agreement. The software may be used or copied only inaccordance
with the terms of the agreement.
Product names mentioned herein may be trademarks and/or registeredtrademarks of their respective companies.
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Preface
This Maintenance and Service Guide is a troubleshooting guide that can beused for reference when servicing the Compaq Presario 1625/1635 SeriesPortable Computers.
Compaq Computer Corporation reserves the right to make changes to the
Compaq Presario Series Portable Computers without notice.
S y m b o ls
The following words and symbols mark special messages throughout thisguide.
WARNING: Text set off in this manner indicates that failure tofollow directions in the warning could result in bodily harm or loss of life.
CAUTION: Text set off in this manner indicates that failure tofollow directions could result in damage to equipment or loss of data.
IMPORTANT:Text set off in this manner presents clarifying information orspecific instr ctions
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P roduct Description
Models and Features
Rear Connectors
Port Replicator
Power Management
Compaq Presario 1600 Series Portable Computers are anew generation of multimedia portable computers with aninnovative integrated design, outstanding audio and video,advanced core features, and attractive styling. This full-function, Pentium-based series of portable computers
allows full desktop functionality.
Compaq Presario 1600 Series Portable Computers
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Troubleshooting
WARNING: To avoid a potential shock hazard during troubleshooting procedures,disconnect all power sources before removing the keyboard cover or the displaybezel.
This chapter covers troubleshooting information for the Compaq PresarioSeries Portable Computers. The basic steps in troubleshooting include:
1. Following the Preliminary Steps .
2. Running the Power-On Self-Test (POST) .
3. If you are unable to run POST you may Troubleshoot Without Diagnostics.
Search for Error Code by number.
Perform the recommended actions in the order listed. Rerun POST after eachrecommended action until the problem is solved and no error message
occurs. Once the problem is solved, do not complete the remainingrecommended actions.
NOTE: If the problem is intermittent, check the computer several times to verify that theproblem is solved.
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I llustrated Parts Catalog
System Unit
Boards
Display
Mass Storage DevicesCables
Miscellaneous Hardw are and Screw s
This chapter provides an illustrated parts breakdownand identifies the spare parts ordering numberassociated with each item(s) for Compaq Presario1600 Series Portable Computers.
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Removal & Replacement P rocedure
This chapter presents the removal and replacement procedures for thecomputer.
ESD
Service Considerations
Cable Positions
Preparing the Computer for Disassembly
Serial Number Location
S e r ia l N u m b e r Lo c a t io n
Report the computer serial number to Compaq whenrequesting information or ordering spare parts. The serial
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Specifications
This section covers the following specifications of Compaq Presario 1600Series Portable Computers:
q Physical and Environmental/Specificationsq System Interruptsq System DMAq System I/O Addressq System Memory Mapq Memory Expansionq Diskette Driveq Hard Driveq CD Driveq Battery Packq Dip Switch Settings
Physical and Environmental/ Specifications
U.S. Metric
Dimensions
HeightDepthWidth
1.96 in12.30 in10.08 in
4.95 cm31.00 cm25.40 cm
Weight
Model 1625Model 1635
7.326Ib7.326Ib
3.33 kg3.33 kg
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Connector Pin Assignments
This section provides connector pin assignment tables for Compaq Presario1600 Series Portable Computers and the Compaq Port Replicator for selectedmodels. For more information on connectors, refer to Rear Connectors forconnectors located on the computer and Port Replicator for connectors locatedon the port replicator.
NOTE: The signals in all tables of this appendix are considered active highunless otherwise indicated by an asterisk (*).
s Parallel Connectors Serial Connectors Keyboard/Mouses External VGA Monitors Phone Line to Wall Jacks Port Replicator
P arallel Connector
P in Signal P in Signal
1 Strobe* 10 Acknowledge*
2 Data Bit 0 11 Busy
3 Data Bit 1 12 Paper Out
4 Data Bit 2 13 Select
5 Data Bit 3 14 Auto Linefeed*
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Battery P ack
This section covers the following information concerning battery packoperating time:
s Increasing Battery Pack Operating Time s Minimizing the Energy Requireds Maximizing the Energy Storeds Conditioning a Battery Pack s Battery Charge Time By Models Disposal of a Used Battery Pack
I n c re a s in g B a t t e ry P a c k O p e r a t in g T im e
Battery pack operating time differs depending on several variables. To avoidunnecessary replacement, consider the following variables when determininghow long a charged battery pack should last:
s Power management settingss Hardware configurations Software applicationss Installed optionss Display brightnesss Hard drive usages Changes in operating temperatures Type and number of installed PC Cards
NOTE: The power consumption requirements for PC Cards vary widely. Some cards drain thebattery pack very rapidly.
Battery pack operating time can be increased by as much as 50 percent bylli h i d b h d h d i h
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Models & Features
Models and Features
Front Of Unit
Left SideComponents
Right Side Components
Bottom Of Unit
M o d e l s
This table lists the relevant features of Compaq PresarioSeries Portable Computers.
Model 1625 Model 1635 Model 1640
Display 12.1"HPA 12.1" TFT 12.1" TFT
ProcessorAMD K6 266 MMX 233 MMX 266 MMX
Hard Drives 3.2 GB 3.2 GB 4 GB
SpeakerAssembly JBL Pro JBL Pro JBL Pro
Modem K-56K D/F M++ 56K D/F K-56 K D/F
F e a t u r e s
All models of the computer have the following features:
q 1.44-MB, 3.5-inch diskette driveq Built-in 24 CD driveq Ported stereo speakersq TouchPadq Easy Access CD Control Buttonsq 91-key (Three Windows 95 keys, 12 function keys) keyboardq External AC adapterq PC Card slots capable of handling one of the following card
combinations:
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Front of Unit
Models and FeaturesFront Of Unit
Left SideComponents
Right Side Components
Bottom Of Unit
Fr o n t o f U n i t
Front of Unit
1. Display 9. CDPreviousTrack
2. Power(On/Off)Button
10. CDNextTrack
3.
DisqPlaySwitch
11.
Keyboard
4. VolumeControlDownButton
12. TouchPad
5. VolumeControl UpButton
13. LeftTouch PadButton
6. StatusPanel
14. RightTouch PadButton
7. CDPlay/Pause
15.IntegratedSpeakers
8. CDStop
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Left Side Components
Models and FeaturesFront Of Unit
Left SideComponents
Right Side Components
Bottom Of Unit
Le f t S id e Co m p o n e n t s
Left Side Components
1.Modem/PhoneJack
4. BatteryCompartment
2. DisketteDrive Slot
5. LeftSpeaker Port
3. DisketteEject Button
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Right Side Components Models and Features
Front Of Unit
Left SideComponents
Right Side Components
Bottom Of Unit
R ig h t S i d e Co m p o n e n t s
Right SideComponents
1.Headphone/Line-OutJack
6. CDDriveEjectButton
2. Line-inJack
7. PCCardTopSlot
3. ExternalMicrophoneJack
8. PCCardBottomSlot
4. CD Drive 9. PCCardEjectLevers
5. CD DriveLight
10.RightSpeakerPort
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Bottom Of Unit
Models and Features
Front Of Unit
Left SideComponentsRight Side Components
Bottom Of Unit
Bottom of Unit
Bottom of Unit
1.MemoryCompartment
2. Feet
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Diagnostic
P r e lim in a r y S t e p s
Before running POST, complete the following preliminary steps:
1. If a power-on password has been established, type the password and press
the Enter key. If the password is not known, clear the password.
2. Run Computer Setup.
3. Adjust the brightness and contrast.
4. Turn off the computer and its external devices.
Disconnect any external devices that you do not want to test. Do notdisconnect the printer if you want to test it or use it to log error messages.
NOTE:
If the problem only occurs when an external device is connected to the computer, the
problem may be related to the external device or its cable. Verify this by runningPOST with and without the external device connected.
6. Install loopback plugs in the serial and parallel connectors if you would liketo test these ports.
7. Ensure the hard drive is installed in the computer.
8. Ensure that the battery pack is inserted in the computer and the computeris connected to an external AC power source.
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P ow er On Self Test (P OST)
R u n n in g P OS T
To run POST, complete the following steps:
Turn off the computer. Let stand for a 10 count, then turn the computer back
on.
If POST does not detect any errors, the computer will not beep. This indicatessuccessful completion of POST test. POST has run successfully and boots fromthe hard drive (or from a bootable diskette if one is installed in the diskettedrive).
If POST detects errors, the errors are indicated by screen and/or audiblemessages. Refer to "Power-On Self-Test (POST) Codes" for a list of POSTcodes and their relevant descriptions.
NOTE:
If the system is not functioning well enough to run POST, or if the display is not
functioning well enough to show POST error messages, refer to the Troubleshootingtables.
Po w er-On Self-Test Messages
102 162 301 304 601 605 1780 1782
P robable Cause Recommended Action
102-System Board Failure
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Troubleshooting W ithout Diagnostics
This section provides information about how to identify and correct somecommon hardware, memory, and software problems. It also explains severaltypes of common messages that may be displayed on the screen. Thefollowing pages contain troubleshooting information on:
Audio MemoryBattery/Battery gauge PC Card CD drive PowerDiskette/Diskette drive PrinterDisplay Touch PadHard drive Keyboard/Numeric keypad
Hardware Installation
Since symptoms can appear to be similar, carefully match the symptoms of the computer malfunction against the problem description in theTroubleshooting tables to avoid a misdiagnosis.
WARNING: To avoid a potential shock hazard during troubleshooting procedures,disconnect all power sources before removing the keyboard cover or the displaybezel.
B e f o r e R e p la c in g P a r t s
When troubleshooting a problem, check the following list for possiblesolutions before replacing parts:
q Verify that cables are connected properly to the suspected defective parts.
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Keyboard Solutions
S o lv in g M in o r Pro b le m s
Some minor problems and possible solutions are outlined here. If theproblem appears related to a software application, check the documentationprovided with the software.
S o lv in g Ke y b o a r d / N u m e r ic Ke y p a d P ro b le m s
Some common causes and solutions for keyboard/numeric keypad problemsare listed in the following table.
Solving Keyboard/ Numeric Keypad Problems
P roblem P robable Cause Solution(s)
Embedded numeric keypad oncomputer keyboard is disabled.
Num Lock function is notenabled.
Press the Shift + NumLk keysto enable the Num Lockfunction and embeddednumeric keypad. The Num
Lock icon on the status panelturns on.
Embedded numeric keypad isdisabled and Num Lockfunction is on.
External numeric keypad isconnected to the computer.
Disconnect the externalnumeric keypad from thecomputer.
Back to Troubleshooting Without Diagnostics
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Hard Drive Solutions
S o lv in g M in o r Pro b le m s
Some minor problems and possible solutions are outlined here. If theproblem appears related to a software application, check the documentationprovided with the software.
S o lv in g H a r d D r iv e P ro b le m s
Some common causes and solutions for hard drive problems are listed in thefollowing table.
CAUTION: To prevent loss of information, always maintain an up-to-date backup of your hard drive at all times, in case of errors or failures.
Solving Hard Drive P roblems
P roblem P robable Cause Solution(s)
Reading hard drive takes anunusually long time afterrestarting the computer.
System entered Hibernationdue to low battery conditionand is now exiting from it.
Give the system time torestore the previously saveddata to its exact state beforeHibernation.
Hard drive error occurs. Hard drive has bad sectors or
has failed.
Run Computer Checkup.
Hard drive does not work. Hard drive is not seatedproperly.
Turn off and unplug thecomputer, remove the batterypack, and remove and thenreinstall the hard drive
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Diskette Solutions
S o lv in g M in o r Pro b le m s
Some minor problems and possible solutions are outlined here. If theproblem appears related to a software application, check the documentationprovided with the software.
Some common causes and solutions for diskette and diskette drive problemsare listed below.
Solving Diskette and Diskette Drive P roblems
P roblem P robable Cause Solution(s)
Diskette drive cannot write to adiskette. Diskette is write-protected. Disable the diskette's write-protect feature or use adiskette that is not write-protected.
Computer is writing tothe wrong drive.
Check the drive letter in thepath statement.
Not enough space is lefton the diskette.
Use another diskette.
Drive error has occurred. Run Computer Checkup fromthe Compaq Diagnosticsdiskette.
Diskette is not formatted. Format the diskette. Atthe system prompt, enter
FORMAT A:Diskette drive cannot read adiskette.
The wrong type of diskette isbeing used.
Use the type of disketterequired by the drive.
Diskette has a bad sector. Copy files to hard drive orth di k tt R f t
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Solving Audio Problems
Solving Minor Problems
Some minor problems and possible solutions are outlined here. If theproblem appears related to a software application, check the documentationprovided with the software.
Some common audio problems and solutions are listed in the following table.
Solving Audio Pro blems
P roblem P robable Cause Solution(s)
Computer does not beep afterthe Power-On Self-Test(POST).
This is typical; it indicatessuccessful completion of thePower-On Self-Test (POST).
No action is required.
Back to Troubleshooting Without Diagnostics
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P ow er Solutions
S o lv in g M in o r Pro b le m s
Some minor problems and possible solutions are outlined here. If theproblem appears related to a software application, check the documentationprovided with the software.
S o lv in g P o w e r Pr o b le m s
Also see Solving Battery and Battery Gauge Problems .
Solving Pow er Problems
P roblem P robable Cause Solution(s)
Computer won't turn on andbattery pack is not inserted*.
Computer is not connectedto a power source.
Power cords to the externalpower source are
unplugged.
Insert battery or connect anexternal power source.
Ensure that power cordsconnecting the computer and
the external power sourceare plugged in properly.
Power adapter is defective. Replace AC Adapter andrestart.
The computer doesn't timeoutwhile on AC power
The system is designed notto timeout while on ACpower.
Windows will spin down thehard drive. Windows can beconfigured to power off the
monitor using the displayproperties control panelapplet. Alternatively, theuser can change "BIOS-PMon AC" in the BIOS setup.
Maintenance & Ser ice G ide
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CD Drive Solutions
S o lv in g M in o r Pro b le m s
Some minor problems and possible solutions are outlined in the followingtables. If the problem appears related to a software application, check thedocumentation provided with the software.
S o lv in g CD D riv e P ro b le m s
Some common causes and solutions for CD drive problems are listed in thefollowing table.
Solving CD Drive P roblemsP roblem P robable Cause Solution(s)
CD drive cannot read acompact disc.
Compact disc is upside downor is improperly inserted inthe CD drive.
Open the CD loading tray, laythe compact disc in it (labelside up), then close the tray.
CD is CD Plus orPregap/Track 0 type.
Cannot read these type CDs in24 CD drive. Remove the CD.
No CDs work at all. The Performance tab inSystem properties shows thatone or more of the hard disksin your computer is using MS-DOS Compatibility mode.
If the driver name listed ascausing MS-DOS Compatibilitymode is MBRINT13.SYS, yourcomputer may be infected witha boot-sector virus. Pleasepurchase a virus scanningsoftware package (consult yourlocal software retailer forrecommendations) to checkyour system. If the applicationyou purchase successfullyeliminates the virus scan
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Hardw are I nstallation Solutions
S o lv in g M in o r Pro b le m s
Some minor problems and possible solutions are outlined here. If theproblem appears related to a software application, check the documentationprovided with the software.
S o lv in g H a rd w a r e I n s t a lla t io n P ro b le m s
Some common causes and solutions for hardware installation problems arelisted here.
Solving Hardw are Installation ProblemsP roblem P robable Cause Solutions(s)
A new device is not recognizedas part of the computer system.
Cable(s) of new externaldevice are loose orpower cables are unplugged.
Ensure that all cables areproperly and securelyconnected.
Power switch of new external
device is not turned on.
Turn off the computer, turn on
the external device, then turnon the computer to integratethe device with the computersystem.
Device is not seated properly. Turn off the computer andreinsert the device.
Back to Troubleshooting Without Diagnostics
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M i & S i G id
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P C Card Solutions
S o lv in g M in o r Pro b le m s
Some minor problems and possible solutions are outlined here. If theproblem appears related to a software application, check the documentationprovided with the software.
S o lv in g P C Ca r d P ro b le m s
Some common causes and solutions for PC Card problems are listed in thefollowing table.
Solving PC Card Prob lemsP roblem P robable Cause Solution(s)
When turned on, thecomputer does not beepwhen a PC Card isinserted *.
Card is not inserted properly. Ensure the card is inserted inthe correct orientation.
PC Card beeps are disabled. Double-click the PC Card icon inthe Control Panel, click the
Global Settings tab, theenable PC Card sound effects.
Speaker is turned off or volume isturned down.
Press volume buttons to turnthe speaker on, then increasethe volume.
PC Card drivers are not installed. Double click the Add NewHardware icon in the ControlPanel for installationinstructions.
If PC Card or drivers are notibl i h Wi d
M i & S i G id
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P rinter Solutions
S o lv in g M in o r Pro b le m s
Some minor problems and possible solutions are outlined here. If theproblem appears related to a software application, check the documentationprovided with the software.
S o lv in g P r in t e r P r o b le m s
If you experience problems printing, run a printer self-test. Refer to thedocumentation provided with your printer for instructions. If the self-test fails,it is a printer-specific problem. Also refer to the printing section of your
application documentation.
Solving P rinter Problems
P roblem P robable Cause Solution(s)
Printer will not turn on. The signal cable may not beconnected properly, or the
printer is unplugged.
Ensure that the signalcable is properly connected
and that the power cord isconnected to the electricaloutlet.
Printer will not print. Printer is not turned on or isoff line.
Turn the printer on and setit to on line.
The device drivers for yourapplication are not installed.
Refer to the printerdocumentation to installthe correct printer driver.
Printer that is set up for anetwork is not connected tothe network.
Connect the printer to thenetwork.
M i t & S i G id
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Touch P ad Solutions
S o lv in g M in o r Pro b le m s
Some minor problems and possible solutions are outlined here. If theproblem appears related to a software application, check the documentationprovided with the software.
S o lv in g T o u c h P a d / P o in t in g De v ic e P ro b le m s
Some common causes and solutions for Touch Pad/pointing device problemsare listed in the following table.
Solving Touch Pad/ Pointing Device ProblemsP roblem Cause Solution(s)
Touch Pad or mouse does not work. Incorrect or no device driveris installed.
Install the device driverand add to theAUTOEXEC.BAT file orCONFIG.SYS file.
The device driver is notinstalled in Windows. Install the TouchPad/mouse driver inWindows.
External mouse does not work. Mouse is not securelyconnected or is connected toan incorrect externalconnector.
Ensure that the mouse issecurely connected to theappropriate externalconnector.
Touch Pad or mouse does not workeven though the device is enabled inWindows.
Mouse is not enabled. Enter SYNTOUCH.COM atthe system prompt toactivate the mouse devicedriver.(C:\WINDOWS\ DOSSTART BAT)
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Error Codes
Diagnostic error codes occur if the system recognizes a problem while runningthe Compaq Diagnostic program. These error codes help identify possiblydefective subassemblies.
The following tables list error codes, a description of the error condition, and
the action required to resolve the error condition.
IMPORTANT: Retest the system after completing each step. If the problem has been resolved,do not proceed with the remaining steps.
For assistance in For the removal and replacement of a particular
subassembly, see Removal and Replacement Procedures .
Select error codes by number or type:
101 through 114 Processor Test
200 through 215 Memory Test
300 through 304 Keyboard Test
401 through 403 Parallel Printer Test
600 through 699 Diskette Drive Tes t
1101 Serial Test
1701 through 1736 Hard Drive Test
501 through 516 Video Test2402 through 2456
2458 through 2480
d
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Boards
System UnitBoards
Display
Mass Storage Devices
CablesMiscellaneous Hardware and Screw s
Description SparePartNumber
1.Heatspreader 298607-001
2.Audio Boardw/Jacks 293882-001
3.LCDInterfaceBoardw/Header
293746-001
4.Modem, M+K-56 KData/Fax
298974-002
K-56KData/Fax
138657-001
5.Fan 332228-001
6.VoltageConverter
293748-001
7.System
Board, w/oProcessor
330982-
001
8.SystemMemory,
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Display
System Unit
Boards
Display
Mass Storage Devices
Cables
Miscellaneous Hardware and Screw s
Display Assembly
Description SparePart
Number
DisplayAssemblyModel 162512.1 inchHPA
298495-001
DisplayAssemblyw/omicrophone,Model12.1 inchTFT
332224-001
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Mass Storage Devices
System Unit
Boards
Display
Mass Storage Devices
Cables
Miscellaneous Hardware and Screws
Description Spare PartNumber
1. DisketteDrive, 1.44 MB,3.5"
330971-001
2. Hard Drive3.2-GB ModelHard Drive 4.0-GB Model
330968-001
330988-001
3. 24 CD Drive 330967-001
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Cables
System Unit
Boards
Display
Mass Storage Devices
Cables
s Miscellaneous Cables Kit
s Modem Cables s AC Power
Cords
Miscellaneous Hardware and Screws
Miscellaneous CablesKi t
Spare Part Number:332234-001
Description Quantity
1a. Cable,CD Drive
1
1b. Cable,
Hard Drive
1
1c. Cable,DisketteDrive
1
1d. Cable,TouchPadSW Board
1
1e. Cable,Fax/Modem
1
CD PlayBoard*
1
*Not Shown
Modem Cables
Description SparePart
Number
Belgium 304398-
181
Canada 137256-001
J 137256
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Miscellaneous Hardware and Screws
System Unit
Boards
Display
Mass Storage Devices
Cables
Miscellaneous Hardware and
Screws
s Miscellaneous Parts
s Miscellaneous Hardware Kit
s Return Kits
Miscellaneous Parts
Description SparePart
Number
1. ACAdapter
298239-001
2. PortReplicator
293857-001
Clock Battery(Not Shown)
117099-001
MiscellaneousScrew Kit(Not Shown)
293760-001
Logo Kit (NotShown)
203727-001
Back to top
Miscellaneous Hardware Kit
Spare Part Nu mber: 293761-001
Description Quantity
1. Cover, Battery Pack 1 ea.
2. Cover, Memory Module 1 ea.
3. Door, PCMCIA 2 ea.
4. Hinge (Clutch) Cover, Left 1 ea.
5. Hinge (Clutch) Cover, Right 1 ea.
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Service Considerations
Listed below are some of the considerations that you should keep in mindduring the disassembly and assembly of the computer.
T o o l a n d S o f t w a re R e q u ir e m e n t s
To service the computer, you need the following:
q Torx T-9 screwdriverq 3/16-inch and 7/32-inch nut drivers (for screw locks and standoffs)q Small, standard screwdriverq Small, Phillips screwdriverq Diagnostics softwareq Service Kit
S c re w s
The screws used in the computer are not interchangeable. If an incorrectscrew is used during the reassembly process, it can damage the unit. Compaqstrongly recommends that all screws removed during disassembly be keptwith the part that was removed, then returned to their proper locations.
IMPORTANT: As each subassembly is removed from the computer, place it away from thework area to prevent damage to the subassembly.
Return to Removal & Replacement Procedures.
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Cable Positions
This section covers types of cables and installation instructions for hard drive cable, diskette drive , ZIF connectors , CD cables and speaker cable installation.
Ca b le s a n d Co n n e c t o r s
Most cables used throughout the unit are ribbon cables. Cables must behandled with extreme care to avoid damage. Apply only the tension requiredto seat or unseat the cables during insertion or removal from the connector.Handle cables by the connector whenever possible. In all cases, avoidbending, twisting, or tearing the cables, and ensure that the cables are routed
in such a way that they cannot be caught or snagged by parts being removedor replaced.
CAUTION: When servicing this computer, ensure that cables areplaced in their proper location during the reassembly process.Improper cable placement can damage the computer.
C a b l e s
Use the following precautions when handling cables to avoid damage to thecable or computer:
s Always handle cables by their connectors.s Avoid bending, twisting, or pulling on the cables.s Apply minimum required force when seating or unseating the cables from their connectors.
l h bl i h h h b h d b b i
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Preparing The Computer For Disassembly
D is a s s e m b lyS e q u e n c eC h a r t
Removing the
Battery PackPalmrest Cover with Touch Pad
Keyboard
Heatspreader
Status Panel
Interface Board
Hard Drive
Battery ChargerBoard
CD Drive
Display AssemblyPlastic Subpanel Assembly
CD Drive Cable
Speaker Assembly
Modem
Diskette Drive
Fan
Audio Assembly
The Compaq 1600 Series computer is a complex tool thatmust be disassembled in a pre-defined order. Failure toadhere to the order can cause damage to the unit. Startwith this screen and work through the screens until the taskis complete. Then work through the screens in reverseorder to reassemble the computer.
NOTE:Remove the battery pack before performing anyinternal maintenance on the computer.
To prepare the computer for disassembly, complete the
following steps:
s Disconnect AC power and any external devicess Remove the battery packs Remove any PC Cards
WARNING: Metal objects can damage the batterypack as well as the battery contacts in the batterycompartment. To prevent damage, do not allowmetal objects to touch the battery contacts. Placeonly the battery pack for the Compaq Presario 1600Series Portable Computers into the battery
compartment. Do not force the battery pack intothe bay if insertion does not occur easily.
CAUTION: Do not crush, puncture, or incineratethe battery pack Do not open a battery pack as
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Removing the Battery P ack
Removing the Battery Pack
Palmrest Cover with Touch Pad
Keyboard
Heatspreader
Status Panel
Interface Board
Hard Drive
Battery ChargerBoard
CD Drive
Display Assembly
Plastic Subpanel Assembly
CD Drive Cable
Speaker
AssemblyModem
Diskette Drive
Removing the Battery Pack
To removethe batterypack,complete thefollowingsteps:
1. Slide thebattery doordown .
2. Slide thebattery packcompartmentdoor downand pull outthe batterypack .
3. To replacethe batterypack,reverse theremovalprocedure.
Back toPreparing the
f
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Removing The Palmrest Cover w ith Touch P ad
The palmrest cover with touch pad is the first component to be removed togain access to any of the interior components of the computer.
NOTE: It is not necessary to remove the display panel assembly to accessthe interior components of the computer.
Removing the Battery Pack
Palmrest Cover with Touch Pad
Keyboard
Heatspreader
Status Panel
Interface Board
Hard DriveBattery ChargerBoard
CD Drive
Display
AssemblyPlastic Subpanel Assembly
Removing the Screws from the Palmrest Coverwith Touch Pad
To removethe palmrestcover withtouch pad,complete thefollowing
steps:
1. Prepare the Computer for Disassembly.
2. Close thecomputerand turn thecomputerupsidedown.
3 Remove
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Removing the Palmrest Cover with Touch Pad
4. Turn the computerover (right side up),pull forward on thedisplay latches torelease and open thedisplay assembly.
5. Lift up the front endof the palmrest cover
with touch pad andremove it from thegroove in the chassis asshown.
Next
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Disconnecting the Palmrest Cover with Touch Pad
6. Tilt the palmrestcover with touch padback, allowing it to reston top of the keyboard,and disconnect the flexcable from the LIFconnector on thepalmrest cover asshown.
To replace the palmrestcover with touch pad,reverse the removalprocedure.
Back to Preparing the Computer for Disassembly
CAUTION: Whenreplacing thepalmrest coverwith touch pad,ensure that thecable is fullyinserted into theLIF connector onthe system board.If metal endshould come in
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Removing The Keyboard
NOTE:To remove a cable from a ZIF connector, lift both corners of the ZIFconnector and slide simultaneously with constant light force. Thenremove the cable.
Removing the Battery
PackPalmrest Cover with Touch Pad
Keyboard
Heatspreader
Status PanelInterface Board
Hard Drive
Battery ChargerBoardCD Drive
Display Assembly
Plastic Subpanel Assembly
CD Drive Cable
Disconnecting the Flex Cable from the ZIFConnector on the System Board
1. Prepare the
computer for disassembly
2. Remove the palmrest cover with touch pad
3. Gently
lift the frontof thekeyboardup, anddisconnectthe flex
cable fromthe ZIFconnectoron the
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NOTE:Use a pair of tweezers to properly replace the cable inside of the ZIFconnector.
Removing the Keyboard
4. Lift the keyboard outof the chassis asshown.
To replace thekeyboard, reverse theprevious procedures.
Back to Preparing the Computer for Disassembly
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Removing The Status P anel
Removing the Battery Pack
Palmrest Cover with Touch Pad
Keyboard
Heatspreader
Status Panel
Interface Board
Hard Drive
Battery ChargerBoard
CD Drive
Display
AssemblyPlastic Subpanel Assembly
Releasing and Removing the Status Panel Cover
1. Prepare the computer for disassembly.
2. Remove the palmrest cover with touch pad .
3. Remove the keyboard.
4. Move thelever
(locateddirectlybelow theCD Playbutton onthe status
panel) to theright torelease thestatus panel
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Disconnecting the Flex Cable from the Connector onthe Status Panel Header
6. Disconnect the flexcable from theconnector on the status
panel header as shownbelow.
To replace the statuspanel, reverse theremoval procedures.
Back to Preparing the Computer for Disassembly
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Removing The Interface Board
Removing the Battery Pack
Palmrest Cover with Touch Pad
KeyboardHeatspreader
Status Panel
Interface Board
Hard Drive
Battery ChargerBoard
CD Drive
Display Assembly
Plastic Subpanel Assembly
CD Drive Cable
Speaker Assembly
Modem
Diskette
Removing the Screws from the Interface Board
1. Prepare the computer for disassembly .
2. Remove the palmrest cover with touch pad .
3. Remove the keyboard .
4. Remove the status
panel .
5. Removethe twoscrews fromthe interface
board asshown.
Next
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Disconnecting the ZIF Connector and Backlight Power Cablefrom the Interface Board
6. Slightlylift theinterface
board,disconnectthe ZIFconnector,andbacklight
power cablefrom theinterfaceboard asshown.
Next
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IMPORTANT:
When removing the interface board with the header attached occasionally theheader will remain attached to the system board. If this occurs when removing theinterface board with the header attached, separate the header from the connectoron the system board.
NOTE:When replacing interface board ensure both connectors on the board are properlyseated.
Removing the Interface Board with Header Attached
7. Lift the interface board up with the headerattached from the system board as shown.
To replace the interface board, reverse theprevious procedures.
An illustration of locations of connectors on the interface board.
Back to Preparing the Computer for Disassembly
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I nterface Board
This page shows an Illustration and table of the locations of the connectors on the
interface board.
Interface Board Components
Interface Board Components
Designator Connector
1. JP1 Backlight Switch
2. JP3 Display InterfaceZIF
3. JP4 Inverter/BacklightLIF Connector
4.None Interface Header
Back to Preparing the Computer for Disassembly
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Disconnecting the Hard Drive Data Cable from the Hard Drive
4. Disconnectthe hard drivedata cable from
the hard driveas shown.
To replace thehard drive,reverse the
previousprocedures.
Back to Preparing the Computer for Disassembly.
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Removing The Battery Charger Board
Removing the Battery
PackPalmrest Cover with Touch Pad
Keyboard
Heatspreader
Status Panel
Interface Board
Hard Drive
Battery ChargerBoard
CD Drive
Display Assembly
Plastic Subpanel Assembly
CD Drive Cable
Removing the Screws and the Battery ChargerBoard
1. Prepare the computer for disassembly .
2. Remove the palmrest cover with touch pad.
3. Remove the keyboard.
4. Remove the hard
drives
5. Remove the stiffener bracket .
6. Removethe twoscrews fromthe battery
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Removing The CD Drive
Removing the Battery Pack
Palmrest Cover with Touch Pad
Keyboard
Heatspreader
Status Panel
Interface Board
Hard DriveBattery ChargerBoard
CD Drive
Display
AssemblyPlastic Subpanel Assembly
Removing the Screws from the CD Drive
1. Prepare the computer for disassembly
2. Remove the palmrest cover with touch pad.
3. Remove the keyboard .
4. Remove the hard drives.
5. Remove the stiffener bracket.
6. Remove
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Opening the CD Drive Tray
9. Open the CD drivetray using a small paperclip as shown.
Next
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Releasing the Lever
10. Release the leveron the CD drive trayand gently push
forward from the rear of the CD drive to accessthe CD drive cable asshown.
Next
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IMPORTANT:
Compaq uses two vendors for CD drives and the CD drive cablesare unique for each. If the replacement CD drive is the same asthe original CD drive, it is not necessary to replace the CD drive
cable.
If the replacement CD drive is different from the original CDdrive, the CD drive cable must be replaced with the cablesupplied with the replacement CD drive.
Disconnecting the CD Drive Cable from the CD Drive
11. Disconnect the CDcable from the CD driveand push forward fromthe rear to remove theCD drive from thechassis as shown.
To replace the CD drive,reverse the previousprocedures.
Back to Preparing the Computer for Disassembly.
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Removing The Display Assembly
Removing the Battery Pack
Palmrest Cover with Touch Pad
Keyboard
Heatspreader
Status Panel
Interface Board
Hard DriveBattery ChargerBoard
CD Drive
Display
AssemblyPlastic Subpanel Assembly
Removing the Hinge Covers
1. Prepare the computer for disassembly .
2. Remove the palmrest cover with touch pad
3. Remove the keyboard .
4. Remove the heatspreader .
5. Remove the status panel .
6. Remove
the interface board .
7 Di
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Removing Screws from the Display Assembly
9. Support the back of the display assemblyand remove the four
screws from the displayassembly as shown.
Next
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Removing the Display Assembly with Flex Cable Attached
10. Gently pull theflex cable attachedto the display
assembly throughthe slot on theplastic subpanelassembly.
11. Remove the
display assemblywith flex cableattached asshown.
Back to Preparing
the Computer for Disassembly.
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8/7/2019 HP / Compaq 1600
87/88
8/7/2019 HP / Compaq 1600
88/88