Compaq 7470 - Presario - 64 MB RAM, Compaq Presario 7400 Series Maintenance And Service Manual
Page 1
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
Product
Description
Troubleshooting
Illustrated
Parts Catalog
Removal &
Replacement
Procedures
Jumper &
Switch
Information
Specifications
See the Notice for copyright and trademark information, and the Preface for symbol conventions and Technician
Notes.
Click to download ZIP file of complete MSG to hard drive.
This MSG will be periodically maintained and updated as needed.
To report a technical problem, contact your Regional Support Center or IM Help Center.
For content comments or questions, contact
Tech Support.
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United States December 31, 2002
NOTICE
The information in this guide is subject to change without notice.
COMPAQ COMPUTER CORPORATION SHALL NOT BE LIABLE FOR TECHNICAL OR EDITORIAL ERRORS OR OMISSIONS
CONTAINED HEREIN, NOR FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM THE FURNISHING,
PERFORMANCE, OR USE OF THIS MATERIAL.
This guide contains information protected by copyright. No part of this guide may be photocopied or reproduced in
any form without prior written consent from Compaq Computer Corporation. © 1999 Compaq Computer Corporation.
All rights reserved. Compaq, Presario Registered U. S. Patent and Trademark Office.
Microsoft, MS-DOS, and Windows are registered trademarks of Microsoft Corporation. Windows 95 and Windows 98
are 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.
Online Maintenance and Service Guide
Compaq Presario 7400 Series Personal Computers
September 1999
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Page 3
PREFACE
This Maintenance and Service Guide is a troubleshooting guide that can be used for reference when servicing the
Compaq Presario 7400 Series Personal Computers.
Compaq Computer Corporation reserves the right to make changes to the Compaq Presario 7400 Series Personal
Computers without notice.
Symbols
The following words and symbols mark special messages throughout this guide.
WARNING: Text set off in this manner indicates that failure to
follow directions in the warning could result in bodily harm or loss
of life.
YellCaution.gif
CAUTION: Text set off in this manner indicates that failure to
follow directions could result in damage to equipment or loss of
data.
IMPORTANT:
Text set off in this manner presents clarifying information or specific
instructions.
NOTE:
Text set off in this manner presents commentary, sidelights, or interesting points of
information.
Technician Notes
WARNING: Only authorized technicians trained by Compaq should repair
this equipment. All troubleshooting and repair procedures are detailed to
allow only subassembly/module level repair. Because of the complexity of the
individual boards and subassemblies, the user should not attempt to make
repairs at the component level or to make modifications to any printed circuit
board. Improper repairs can create a safety hazard. Any indications of
component replacement or printed circuit board modifications may void any
warranty.
Serial Number
When requesting information or ordering spare parts, the computer serial number should be provided to Compaq.
The serial number can be found on the front right side of the chassis (between the CD/DVD/Zip drives and the drive
door hinge) and also on the back of the computer above the power supply.
Locating Additional Information
The following documentation is available to support this product:
■ Compaq Presario documentation set
■ Introducing Windows 98 Guide
■ Service Training Guides
■ Compaq Service Advisories and Bulletins
■ Compaq QuickFind
■ Compaq Service Quick Reference Guide
■ Compaq Help Center
Page 4
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting
Illustrated Parts
Catalog
Home
Removal &
Replacement
Jumper & Switch
Information
Specifications
PRODUCT DESCRIPTION
Product Description
Models and features
CPU controls and lights
Keyboard
Creativity Action Center
Back components
Power cord requirements
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Page 5
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting
Illustrated Parts
Catalog
Home
Removal &
Replacement
Jumper & Switch
Information
Specifications
Product Description
Models and features
CPU controls and lights
Keyboard
Creativity Action Center
Back components
Power cord requirements
PRODUCT DESCRIPTION
Compaq Presario 7400 Series Standard
Configurations
Models
Processor
MHz
Hard
drive
GB
RAM
MB
CD/DVD/CD-
RW
Modem
North America (NA)
7460
K6-2
(500)
8.0 64 CD-RW
PCI ITU
V.90 56K
7461
K6-2
(500)
8.0 64 40X CD
PCI ITU
V.90 56K
7462
K6-2
(500)
10.0 64 8X/10X DVD
PCI ITU
V.90 56K
7464
K6-2
(500)
8.0 64 8X/10X DVD
PCI ITU
V.90 56K
7465
K6-2
(533)
17.0 64 CD-RW
PCI ITU
V.90 56K
7467
K6-2
(500)
10.0 64 40X CD
PCI ITU
V.90 56K
7469
K6-2
(500)
13.0 64 40X CD
PCI ITU
V.90 56K
7471
K6-2
(533)
30.0 64 CD-RW
PCI ITU
V.90 56K
7473
K6-2
(533)
10.0 64 CD-RW
PCI ITU
V.90 56K
7475
K6-2
(533)
40.0 64
8X/10X DVD
and CD-RW
PCI ITU
V.90 56K
7477
K6-2
(533)
20.0 64 CD-RW
PCI ITU
V.90 56K
7478
K6-2
(533)
8.0 64 CD-RW
PCI ITU
V.90 56K
7479
K6-2
(533)
20.0 64 CD-RW
PCI ITU
V.90 56K
7485
K6-2
(550)
20.0 64 CD-RW
PCI ITU
V.90 56K
7488
K6-2
(550)
30.0 64 CD-RW
PCI ITU
V.90 56K
7489
K6-2
(550)
40.0 64
8X/10X DVD
and CD-RW
PCI ITU
V.90 56K
APD
7400
K6-2
(500)
8.0 64 40X CD
International
56K
7400
K6-2
(533)
8.0 64 40X CD
International
56K
7480
K6-2
(550)
10.0 64 40X CD
International
56K
EMEA
7450
K6-2
(475)
8.0 64 40X CD
International
56K
7460
K6-2
(500)
8.0 64 CD-RW
International
56K
7461
K6-2
(500)
8.0 64 40X CD
International
56K
7464
K6-2
(500)
8.0 64 8X/10X DVD
International
56K
7470
K6-2
(533)
10.0 128 8X/10X DVD
International
56K
7474
K6-2
(533)
8.0 64 8X/10X DVD
International
56K
7478
K6-2
(533)
30.0 64
8X/10X DVD
and CD-RW
International
56K
7479
K6-2
(533)
15.0 64 40X CD
International
56K
7480
K6-2
(550)
15.0 64 40X CD
International
56K
7481
K6-2
(550)
15.0 64 CD-RW
International
56K
7482
K6-2
(550)
15.0 64
8X/10X/12X
DVD
International
56K
7483
K6-2
(550)
15.0 64
8X/10X/12X
DVD
International
56K
7484
K6-2
(533)
15.0 64
8X/10X/12X
DVD
International
56K
Latin America (LA)
7453
K6-2
(475)
5.0 32 40X CD
PCI ITU
V.90 56K
7463
K6-2
(500)
5.0 64 40X CD
PCI ITU
V.90 56K
7470
K6-2
(533)
20.0 64 CD-RW
PCI ITU
V.90 56K
7476
K6-2
(533)
10.0 64 40X CD
PCI ITU
V.90 56K
7477
K6-2
(550)
20.0 64 CD-RW
PCI ITU
V.90 56K
Page 6
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home Removal & Replacement Jumper & Switch Information Specifications
Product Description
Models and features
CPU controls and lights
Keyboard
Creativity Action Center
Back components
Power cord
requirements
PRODUCT DESCRIPTION
CPU Controls and
Lights
1
Emergency eject slot
2
CD/DVD drive activity
light (on select models
the light is displayed to
the left of the manual
eject slot) (CD-RW selected models)
3 CD/DVD load/eject
button
4
Floppy drive eject
button & activity light
5
Zip drive eject button
& activity light (Zip
drive - selected
models)
6
Hard drive activity light
7
Instant On button
8
Power status light
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United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home Removal & Replacement Jumper & Switch Information Specifications
Product Description
Models and features
CPU controls and
lights
Keyboard
Creativity Action
Center
Back components
Power cord
requirements
PRODUCT DESCRIPTION
Top left and right controls (View keyboard top right corner assignments)
Keyboard
Controls and
Lights
1
Play/pause
2
Previous track
3
Next track
4
Stop
5
Load/Eject CD
6
Quick Print
7
Application
launch
8
Volume down
9
Mute
10
Volume up
11
Sleep button
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United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
Home
Product Description Troubleshooting Illustrated Parts Catalog
Removal & Replacement Jumper & Switch Information Specifications
Product Description
Models and features
CPU controls and lights
Keyboard
Creativity Action Center
Back components
Power cord requirements
PRODUCT DESCRIPTION
Center controls and upper right corner lights
Keyboard
Controls and
Lights
1
Instant e-mail
2
Daily destination
3
My Presario
4
Instant Internet
5
Instant Search
6
Online
Marketplace
7
Retail Central
8
Num Lock Light
9
Caps Lock Light
10
Scroll Lock Light
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United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home Removal & Replacement Jumper & Switch Information Specifications
Product Description
Models and features
CPU controls and lights
Keyboard
Creativity Action Center
Back components
Power cord requirements
PRODUCT DESCRIPTION
Available on select models.
Creativity
Action
Center
1 Two USB
(Universal
Serial Bus)
ports
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Page 10
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home Removal & Replacement Jumper & Switch Information Specifications
Product Description
Models and features
CPU controls and lights
Keyboard
Creativity Action Center
Back components
Power cord
requirements
PRODUCT DESCRIPTION
View connector pin assignments.
Back CPU Connectors
1
Mouse
2
Keyboard
3
Two USB ports
4
Serial port
5
SVGA monitor port
6
Audio line out
7
Audio line in
8
Microphone in
9
Modem line
10
Voltage select switch
11
AC power connector
12
Parallel Port
13
MIDI Game Port
14
Telephone line to telephone
CAUTION: Do not plug a phone line into the
network connector or you may damage the
computer
.
IMPORTANT:
The Back CPU connectors and cable
connectors are color coded.
NOTE:
Select models may contain an Ethernet
network card.
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Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home
Removal &
Replacement
Jumper & Switch
Information
Specifications
Product Description
Models and features
CPU controls and
lights
Keyboard
Creativity Action
Center
Back components
Power cord
requirements
PRODUCT DESCRIPTION
Power Cord Set Requirements
The power supply should be set based on the country where it purchased
and used. The voltage select switch feature should be set to 115 Volts AC
for the USA.
The power cord set (flexible cord and wall plug) received with the computer
meets the requirements for use in the country where the computer was
purchased.
Power cord sets for use in other countries must meet the requirements of
the country where you use the computer. For more information on power
cord set requirements, contact your Compaq authorized dealer, reseller, or
service provider.
General Requirements
The requirements listed below are applicable to all countries:
1
The length of the power cord set must be at least
6.00 feet (1.8 m) and no longer than 9.75 feet (3.0
m).
2
All power cord sets must be approved by an
acceptable accredited agency responsible for
evaluation in the country where the power cord set
will be used.
3
The power cord set must have a minimum current
capacity of 10A and a nominal voltage rating of 125
or 250 volts AC, as required by each country's
power system.
4
The appliance coupler must meet the mechanical
configuration of an EN 60 320/IEC 320 Standard
Sheet C13 connector for mating with appliance inlet
on the Switch Box.
Country-Specific Requirements
Country Accredited Agency
Country Accredited
Agency
Australia EANSW* Italy IMQ*
Austria OVE* Japan JIS***
Belgium CEBC* Norway NEMKO*
Canada CSA** Sweden SEMKO*
Denmark DEMKO* Switzerland SEV*
Finland SETI* United
Kingdom
BSI*
France UTE* United States UL**
Germany VDE*
ll ll
* The flexible cord must be <HAR> Type HO3VV-F, 3conductor, 1.0 mm2 conductor size. Power cord set fittings
(appliance coupler and wall plug) must bear the
certification mark of the agency responsible for evaluation
in the country where it will be used.
** The flexible cord must be Type SJT-2 or equivalent, No.
18 AWG, 3-conductor. The wall plug must be a two-pole
grounding type with a NEMA 5-15P (15A, 125V) or NEMA 615P (15A, 250V) configuration.
*** The appliance coupler, flexible cord, and wall plug
must bear a "T" mark and registration number in
accordance with the Japanese Dentori Law. Flexible cord
must be Type VCT or VCTF, 3-conductor, 0.75mm2
conductor size. The wall plug must be a two-pole type with
a Japanese Industrial Standard C8303 (15A, 125V)
configuration.
Page 12
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home Removal & Replacement Jumper & Switch Information Specifications
TROUBLESHOOTING
Troubleshooting
Clearing CMOS
Power-On Self Test
(POST)
Configuration
Diagnostics Software
Troubleshooting
without diagnostics
This section provides troubleshooting information for Compaq Presario 7400 Series
Personal Computers. Power-On Self-Test (POST) messages appear in tables.
The message and code tables include a description of the error, the probable cause,
and the recommended action that should be taken to resolve the error condition.
Adherence to the procedures and precautions described in this section is essential for
proper service.
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United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home Removal & Replacement Jumper & Switch Information Specifications
Troubleshooting
Clearing CMOS
Power-On Self Test
(POST)
Configuration
Diagnostics Software
Troubleshooting
without diagnostics
TROUBLESHOOTING
Clearing CMOS
CMOS jumper location
1
Complete the
preparation for disassembly.
2
Remove the chassis.
3
Remove the fax/modem board.
4
Remove the PCI bracket.
5
To clear the CMOS: move the jumper (JP3) pins to
the 2-3 position for 10 seconds. To return to
normal operation, move the pins back to the 1-2
position.
6
Replace the system board bracket
and perform the desired troubleshooting.
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Page 14
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home Removal & Replacement Jumper & Switch Information Specifications
Troubleshooting
Clearing CMOS
Power-On Self Test
(POST)
Configuration
Diagnostics Software
Troubleshooting without
diagnostics
TROUBLESHOOTING
Power-On Self Test (POST)
POST is a series of diagnostic tests that run automatically when the system is turned on. After the
computer is turned on, POST checks the following assemblies to ensure that the computer system is
functioning properly:
● Keyboard
● System board
● Memory modules
● Video memory
● Diskette drives
● Hard drive
● Power supply
POST also detects the type of mass storage devices installed in the computer.
If POST finds an error in the system, an error condition is indicated by an audible and/or visual
message. The table below gives explanations of the error codes and a recommended course of action.
NOTE:
An external speaker must be installed into the speaker output connector to
hear audible beeps during POST.
Click a link below to find the probable cause and recommended action for a given error message.
Diskette Drive A or B Error Keyboard Controller Error System BIOS Shadowed
Extended RAM failed at
offset nnn
Keyboard Error System Cache Error
Failing Bits nnn Operating System Not
Found
System CMOS Checksum Bad
Fixed Disk 0 or 1 Failure Parity Check 1 System RAM Failed at Offset, nnn
Fixed Disk Controller Failure Parity Check 2 System Timer Error
Incorrect Drive A Type Real Time Clock Error UMB Upper Limit Segment
Address nnn
Invalid NVRAM Media Type System Battery is Dead Video BIOS Shadowed
POST Messages
Error message Probable Cause Recommended Action
Diskette Drive A or
B Error
Drive A: or B: is present, but fails the
BIOS POST diskette tests
1. Run
Setup.
2. Replace the signal cables.
3. Replace the drive.
Extended RAM
failed at offset nnn
Extended memory not working or not
configured properly
1. Replace the
memory modules.
2. Replace the
system board.
Failing Bits nnn nnn is a map of the bits at the RAM
address which failed the memory test
1. Run Setup.
2. Replace the
system board.
Fixed Disk 0 or 1
Failure
Hard drive is not working or not
configured properly
1. Run Setup.
2. Replace the signal cable.
3. Replace the hard drive.
Fixed Disk
Controller Failure
Hard drive is not working or not
configured properly
1. Run Setup.
2. Replace the
system board.
Incorrect Drive A
Type
Type of diskette in drive A: not
correctly identified
1. Run Setup.
2. Replace the
diskette drive.
Invalid NVRAM
Media Type
Problem with NVRAM (CMOS) access Replace the
system board.
Keyboard Controller
Error
Keyboard, I/O keyboard controller (on
system board), or mouse error
1. Replace the keyboard.
2. Replace the mouse.
3. Replace the
system board.
Keyboard Error Keyboard, I/O keyboard controller (on
system board), or mouse error
1. Replace the keyboard.
2. Replace the mouse.
3. Replace the
system board.
Operating System
Not Found
Operating system cannot be located on
either drive A: or C:
Run Setup.
Parity Check 1 Parity error found in the system bus 1. Run
Setup.
2. Replace the
memory modules.
3. Replace the
system board.
Parity Check 2 Parity error found in the I/O bus 1. Run Setup.
2. Replace the
ISA board (modem).
Real Time Clock
Error
Real-time clock fails BIOS test Replace the
system board.
System Battery is
Dead
RTC battery is dead 1. Replace the
RTC battery.
2. Run
Setup.
System BIOS
Shadowed
System BIOS copied to Shadow RAM Status message. No action required.
System Cache Error RAM cache failed the BIOS test Run
Setup.
System CMOS
Checksum Bad
CMOS is corrupted or modified
incorrectly
Run Setup.
System RAM Failed
at Offset, nnn
System RAM failed Replace
memory modules.
System Timer Error DMA, timers, etc. Replace the
system board.
UMB Upper Limit
Segment Address
nnn
Displays the address nnn of the upper
limit of Upper Memory Blocks,
indicating released segments of the
BIOS
Status message. No action required.
Video BIOS
Shadowed
Video BIOS successfully copied to
shadow RAM
Status message. No action required.
Page 15
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home Removal & Replacement Jumper & Switch Information Specifications
Troubleshooting
Clearing CMOS
Power-On Self Test
(POST)
Configuration
Diagnostics Software
Troubleshooting
without diagnostics
TROUBLESHOOTING
Configuration
This section explains how to use Setup and Compaq Utilities which should be accessed in the following
instances:
● When a system configuration error is detected during the Power-On Self-Test
(POST)
● To change factory default settings for some of the computer features
● To change the system configuration, which is sometimes necessary when you add
or remove optional hardware
● To set system configuration features
Click a link below to go to the appropriate subsection.
Preparing the Computer
Setup
Accessing Compaq Utilities Options
View System Information (INSPECT)
Preparing the Computer
If you encounter an error condition, complete the following steps before starting problem isolation
procedures:
1
Ensure proper ventilation. The computer should have a 3-inch (7.6 cm) clearance
at the back of the system unit.
2
Turn off the computer and peripheral devices.
CAUTION: Always ensure that the power is off before
disconnecting or reconnecting the mouse, keyboard, or any other
peripheral devices. Disconnecting or connecting the keyboard or
mouse while the unit power is on can damage the system board.
3
Disconnect any peripheral devices other than the monitor and keyboard. Do not
disconnect the printer if you want to test it or use it to log error messages.
4
Install loop-back and terminating plugs for complete testing.
Setup
The Setup utility gives a snapshot of the computer's hardware configuration, aids in troubleshooting,
and sets custom features. Setup recognizes a new internal component or an external device and
automatically updates the configuration screens. Use the Setup utility to:
● Modify settings for audio, storage, power management, communications, and
input devices
● Get an overall picture of the computer's hardware configuration
● Verify configuration parameters in determining problems
● Set time and date
Running Setup
To access the Setup utility, turn on the computer and press the F10 key when the Compaq logo
appears. The following menu will appear:
NOTE:
The actual menu displayed on your computer may
vary slightly, depending on your configuration.
Accessing Compaq Utilities Options
This section provides information about the menu options accessible from the Compaq Utilities
menu.
Create a Compaq Utilities Diskette
A Compaq Utilities diskette must be created to troubleshoot the system. To create a Compaq Utilities
diskette, complete the following steps:
1
Insert the QuickRestore CD into the CD drive.
2
From the Windows desktop, click on Start, then Program, then Windows
Explorer.
3
Click on the CD drive icon.
4
Double-click on the PCdiags folder.
5
Insert a diskette in the diskette drive.
6
Double-click on the QRST5.exe icon.
7
Press Enter when the QuickRestore label appears.
8
After the CD has completed copying to the diskette, eject the QuickRestore CD.
View System Information (INSPECT)
The View System Information (INSPECT) utility provides information about the system once it has
been configured. INSPECT operates with MS-DOS and provides information about the system
operating environment including
● Contents of the operating system startup files
● Current memory configuration
● ROM version
● Type of processor and coprocessor
● Diskette and hard drives
● Active printer and communications interfaces
● Modem
Page 16
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting
Illustrated Parts
Catalog
Home
Removal &
Replacement
Jumper & Switch
Information
Specifications
Troubleshooting
Clearing CMOS
Power-On Self Test
(POST)
Configuration
Diagnostics Software
Troubleshooting without
diagnostics
TROUBLESHOOTING
Diagnostics Software
Two diagnostic software tools are available to assist in
troubleshooting your Presario Product:
● Compaq Diagnostics for Windows is preinstalled on your
system. To access Diagnostics for Windows, click Start,
point to Settings, then select Control Panel, and then
double-click Compaq Diagnostics.
● Compaq Personal Computer Diagnostics, a DOS-based tool,
is available for download from the Compaq Web site at
www.compaq.com.
Both tools provide general system information, verify system
functionality, test the system, and identify possible defective
components. Compaq Diagnostics for Windows provides specific
recommended actions in the case of failure.
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Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home Removal & Replacement Jumper & Switch Information Specifications
Troubleshooting
Clearing CMOS
Power-On Self Test
(POST)
Configuration
Diagnostics Software
Troubleshooting
without diagnostics
TROUBLESHOOTING
Troubleshooting Without Diagnostics
This section describes some simple, preliminary tests and guidelines for troubleshooting the
computer.
Checklist For Solving Minor Problems
If you encounter some minor problem with the computer or with a software application,
go through the following checklist for possible solutions before running any of the diagnostic
utilities:
● Is the computer connected to a working power outlet?
● Is the computer turned on and the power light illuminated?
● Are all cables connected properly and seated?
● Are all of the necessary device drivers installed?
● Is the CONFIG.SYS file correct?
● Is the AUTOEXEC.BAT file (MS-DOS) or STARTUP.CMD file correct?
● Was a nonbootable diskette loaded in the diskette drive at power-up?
● Are all switch settings correct?
● Was Computer Setup run after installing the options (memory, disk drives, etc.)
and before installing the industry standard architecture boards?
Quick checks and possible solutions for problems related to these topics:
CD drive hard drive VGA monitor
diskette drive hardware installation
DVD drive power
flat-panel monitor (on
select models only)
USB ports
are provided in the tables below. The procedure for
resolving hardware conflicts is also described.
Flat-panel monitor
Problem Probable cause(s) Possible solution
Screen is
blank.
Your computer may
not support flat-panel
monitors.
See your authorized dealer or reseller about CPU
support for the Digital Video Interface (DVI) needed.
Cannot find
the video
connector on
back of the
CPU for a flatpanel monitor.
Your computer may
not have a digital flatpanel port (DFPP).
See your authorized dealer or reseller about CPU
support for flat-panel monitors.
The display
only fills part
of the screen.
The monitor does not
support your
resolution setting.
FP400 and FP500 Series flat-panel monitors only
support the 1024 x 768 resolution mode. To change
your resolution setting in the Display dialog box:
1
Click on Start.
2
Point at Settings and click on Control Panel.
3
Double-click on Display.
4
Click on the Setting tab, and move the sliding
pointer to give 1024 x 768 pixel resolution.
Green power
light is
flashing.
Your flat-panel
monitor does not
support the video
resolution or refresh
rate.
FP400 and FP500 Series flat-panel monitors only
support 1024 x 768 resolution mode. Connect a VGA
monitor temporarily and change your resolution
setting in the Display dialog box:
1
Click on Start
2
Point at Settings and click on Control Panel
3
Double-click on Display
4
Click on the Setting tab, and move the
sliding pointer to give 1024 x 768 pixel
resolution.
CD drive
Problem Probable
cause(s)
Possible solution
Cannot read
compact disc.
CD is not properly
seated in the drive.
Eject the CD, then re-insert it, pressing down
gently on the CD to correctly seat it in the
drive.
CD has been loaded
upside down.
Eject the CD, turn it over, then reload.
CD may be dirty or
scratched.
Clean the CD or load another CD.
Cannot eject
compact disc
(tray-load
only).
CD is not properly
seated in the drive.
Turn off the computer, insert a straightened
paper clip into the emergency eject hole, then
push firmly. Slowly pull the tray out from the
drive until the tray is fully extended, then
remove the CD.
CD drive devices
are not
detected.
Power cycle delay After turning the computer off, wait 30
seconds before turning the computer on again.
CD drive is not
connected properly.
Open the computer and check to see that the
drive cable is connected properly.
Proper driver is not
loaded.
Restart the system and make sure the CD
drive drivers are loaded.
DVD drive
Problem Probable cause(s) Possible solution
Cannot
read DVD
disc
DVD or CD is not properly
seated in the drive.
Eject the DVD or CD, press down on the DVD or
CD firmly to seat it correctly in the drive, then
reload.
DVD or CD has been
loaded upside down.
Eject the disc, turn it over, then reload.
DVD or CD disc may be
dirty or scratched.
Load another DVD disk.
DVD does
not work in
the DOS
mode.
Proper drivers are not
loaded.
Restart the system and make sure the DVD
drive drivers are loaded.
Cannot
eject DVD
disc.
The system is in the
Sleep mode.
Press the Power button to bring the system back
to full power, then eject the DVD.
The DVD, diskette, or
hard drive was active
when attempting to eject
the DVD.
Wait until all drive activity ends (the CD/hard
drive light and diskette drive light will go out),
then try to eject the DVD.
DVD disc is not properly
seated in the drive.
Turn off the computer, insert a straightened
paper clip into the emergency eject hole, then
push firmly. Slowly pull the tray out from the
drive until the tray is fully extended, then
remove the DVD disk.
DVD drive
devices are
not
detected.
DVD drive is not
connected properly.
Open the computer and check to see that the
drive cable is connected properly.
Incorrect driver is
installed.
Ensure the correct driver is installed in
CONFIG.SYS.
Drive has been changed. Make sure the jumper setting is set for "Slave."
Proper drivers are not
loaded.
Restart the system and make sure the DVD
drive drivers are loaded.
Resolving Hardware Conflicts
Hardware conflicts occur when two or more peripheral devices attempt to use the same hardware
resources. I/O addresses, interrupts, and DMA channels are the most common hardware resources
used by peripheral devices. For example, the factory default settings for the MIDI port audio
interface are:
Base I/O address 220H
MIDI Port Base I/O address 330H
Interrupt IRQ 5
8-bit DMA Channel 1
When different peripheral devices use the same hardware resources at the same time, the devices
and/or the system may not function properly. You can resolve hardware conflicts by ensuring that
no devices are configured to use the same hardware resources. These resources can either be
dipswitch or jumper settings on the peripheral card or software configurable resources. The
Computer Setup selection of your Compaq Utilities allows you to view and modify the settings for
the peripheral devices factory installed in your system. Refer to the User's Guide for the particular
peripheral cards you wish to install for information on how to view and select their settings.
To resolve hardware conflicts:
1 Change the hardware settings of your audio card or other peripheral card in your
system if the peripheral card is using any settings used by the factory-installed
devices.
2 If you are unsure of the settings of the peripheral cards, you can isolate the
source of the problem by temporarily removing all cards not manufactured by
Compaq, or resetting the default settings and running Compaq Utilities. After
that, add the cards back one at a time until the card that is causing the conflict is
found.
Also see:
System
Page 18
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Specifications
Clearing CMOS
Power-On Self Test
(POST)
Configuration
Diagnostic error
codes
Troubleshooting
without diagnostics
TROUBLESHOOTING
Troubleshooting Without Diagnostics (continued)
Hard drive
Problem Probable
cause(s)
Possible solution
Hard drive
error
occurs.
Hard disk has
bad sectors
or has failed.
Run
Computer Setup.
Reformat the hard disk.
Drive not
found.
Cable could
be loose.
Check cable connections.
Disk
transaction
problem.
Either the
directory
structure is
bad or there
is a problem
with a file.
From the desktop click on the
Start menu. Choose Program
Accessories
System Tools
Scandisk to check for problems. If
problems exist, run Scandisk and
checkmark the "Automatically fix
errors" box at the bottom to
correct the problems. If a large
number of lost allocation units is
found, click on the Start menu.
Choose Program
Accessories
System Tools
Disk
Defragmenter.
Nonsystem
disk
message.
The system
is trying to
start from a
diskette that
is not
bootable.
Remove the diskette from the
diskette drive.
The system
is trying to
start from
the hard
drive but the
hard disk has
been
damaged.
Insert a bootable diskette into the
diskette drive and restart the
computer with Ctrl+Alt+Del.
Diskette boot
has been
disabled in
Computer
Setup.
Run Computer Setup and enable
diskette boot.
Hard drive
operation
seems
slow
OR
Hard drive
activity
light is not
on,
or stays on
without
blinking.
The hard disk
files may be
fragmented.
From the desktop click on the
Start menu. Choose Program
Accessories
System Tools
Scandisk to check for problems. If
problems exist, run Scandisk and
checkmark the "Automatically fix
errors" box at the bottom to
correct the problems. If a large
number of lost allocation units is
found, click on the Start menu.
Choose Program
Accessories
System Tools Disk
Defragmenter.
Hardware installation
Problem Probable
cause(s)
Possible solutions
A new
device is
not
recognized
as part of
the
computer
system.
When the system
advised you of
changes to the
configuration, you did
not save the changes.
Reboot the computer and
follow the instructions for
saving the changes.
The system may not
have automatically
recognized the new
device.
Run
Computer Setup and
identify the new device.
The cables for the
new external device
are loose, or the
power cables are
unplugged.
Check all cables.
The power switch for
the new external
device is not turned
on.
Turn off the computer,
turn on the external
device, and then turn on
the computer to integrate
the new device with the
computer.
Power
Problem Possible Solution
Computer will not turn
on.
Ensure that the computer is connected
to a power source.
Computer does not
automatically
display the date and
time.
The real-time clock (RTC) battery may
need to be replaced.
Click here for
replacement procedures.
Computer does not
beep during POST.
The speaker volume may have been
turned down. Select the Volume
option from the Control Panel and
adjust the volume.
Computer powered off
automatically.
The unit temperature may have been
exceeded. Check the fan for function
and blockage.
USB
Problem Probable
cause(s)
Possible solution
USB
device
does not
work with
the
system.
The USB device
and the system
may use
different USB
architectures.
Ensure that the USB device and
the system share the same USB
architecture. (UHCI-compliant
devices will only work with a
UHCI-compliant system, and
OHCI-compliant devices will only
work with a OHCI-compliant
system).
Diskette Drive
Problem Probable cause(s) Possible solution
Diskette
drive
light
stays on.
Diskette may be
damaged.
From the desktop click
on the Start menu.
Choose Program
Accessories
System Tools
Scandisk to check for
problems.
Diskette may be
installed incorrectly.
Remove the diskette
and reinsert.
Software program may
be damaged.
Check the program
diskettes.
Diskette
drive
cannot
write to a
diskette.
Diskette is not
formatted.
Format the diskette.
Diskette is writeprotected.
Either use another
diskette that is not writeprotected or disable the
write protection on the
diskette.
Writing to the wrong
drive.
Check the drive letter in
your path statement.
Not enough space is left
on the diskette.
Use another diskette to
write the information.
Diskette
drive
cannot
read a
diskette.
Diskette is not
formatted.
Format the diskette.
Using the wrong
diskette type for the
drive type.
Use a diskette that is
compatible with the
drive.
Reading the wrong
drive.
Check the drive letter in
your path statement.
Diskette drive has been
disabled by Computer
Setup.
Run
Computer Setup
and enable the diskette
drive.
SuperDisk Drive
Problem Probable cause(s) Possible solution
SuperDisk
drive
light
stays on.
Diskette may be
damaged.
From the desktop click
on the Start menu.
Choose Program
Accessories
System Tools
Scandisk to check for
problems.
Diskette may be
installed incorrectly.
Remove the diskette
and reinsert.
Software program may
be damaged.
Check the program
diskettes.
SuperDisk
drive
cannot
write to a
diskette.
Diskette is not
formatted.
Format the diskette.
Diskette is writeprotected.
Either use another
diskette that is not writeprotected or disable the
write protection on the
diskette.
Writing to the wrong
drive.
Check the drive letter in
your path statement.
Not enough space is left
on the diskette.
Use another diskette to
write the information.
SuperDisk
drive
cannot
read a
diskette.
Diskette is not
formatted.
Format the diskette.
Using the wrong
diskette type for the
drive type.
Use a diskette that is
compatible with the
drive.
Reading the wrong
drive.
Check the drive letter in
your path statement.
Diskette drive has been
disabled by Computer
Setup.
Run
Computer Setup
and enable the diskette
drive.
VGA Monitor
Problem Probable
cause(s)
Possible solution
Characters
are dim.
The brightness
control is not set
properly.
Adjust the brightness
control.
Screen is
blank.
A screen-blanking
utility could be
installed.
Press any key. If the
display reappears, you
have a screen-blanking
utility installed.
The brightness
needs adjusting.
Adjust the brightness
control.
Screen save has
been initiated.
Press any key or move the
mouse to light the screen.
Garbled
characters
on the
screen
are mixed
with text.
The ANSI.SYS driver
is not in the
CONFIG.SYS file.
Add the ANSI.SYS driver to
the CONFIG.SYS file by
adding the following line:
DEVICE = C:\ANSI.SYS
Monitor
overheats.
There is not enough
ventilation space for
proper airflow.
Leave at least 3 inches
(7.6 cm) of ventilation
space. Also, be sure there
is nothing on top of the
monitor to obstruct air
flow.
Cursor will
not move
using the
arrow
keys on
the
numeric
keypad.
The Num Lock key
is on.
Press the Num Lock key.
The Num Lock light
should not be on when you
want to use the arrow
keys.
There is a possible
application error.
Restart the computer.
Page 19
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home Removal & Replacement Jumper & Switch Information Specifications
System
Power supply
Diskette drive
Hard drives
DVD drive
CD drives
Mouse
Fax/modem
Zip drive
SPECIFICATIONS
System Specifications
General system specifications
System interrupts
System I/O (system function - shipping configuration)
System memory
System DMA
General System Specifications
U. S. Outside U. S.
Dimensions
Height 16.55 in 420.37 mm
Depth 17.30 in 439.32 mm
Width 8.76 in 222.50 mm
Weight
25.3 lbs. 11.5 kg
Shipping Weight
36.6 lbs 16.4 kg
Input Requirements
Voltage Range 100 to 120 210 to 240
AC Frequency 50 or 60 Hz 50 or 60 Hz
Fluctuations 5v +/-5% 3.3v +/-3%
Power (watts)
Steady State 145 145
Sleep Mode < 30 < 30
Environmental Requirements
Temperature
Operating 50° to 95° F 10° to 35° C
Shipping -22° to 140° F -30° to 60° C
Humidity (noncondensing)
Operating 10% to 90% 10% to 90%
Nonoperating 5% to 95% 5% to 95%
Maximum Altitude (unpressurized)
Operating 10,000 ft 3048 m
Nonoperating 30,000 ft 9144 m
*This number will increase if more bays/slots are occupied.
System Interrupts
Hardware IRQ System Function
IRQ 0 System Timer
IRQ 1 Standard 101/102-Key or Microsoft Natural Keyboard
IRQ 2 Programmable interrupt controller
IRQ 3 (free)
IRQ 4 Communications Port (COM1)
IRQ 5 (free)
IRQ 6 Standard Floppy Disk Controller
IRQ 7 ECP Printer Port (LPT1)
IRQ 8 System CMOS/real time clock
IRQ 9 SCI IRQ used by ACPI bus
IRQ 10 (free)
IRQ 11 ACPI IRQ Holder for PCI IRQ Steering
IRQ 11 ACPI IRQ Holder for PCI IRQ Steering
IRQ 11 ACPI IRQ Holder for PCI IRQ Steering
IRQ 11 PCI Multimedia Audio Device
IRQ 11 IRQ Holder for PCI Steering
IRQ 11 Standard PCI Graphics Adapter (VGA)
IRQ 11 VIA tech 3038 PCI to USB Universal Host Controller
IRQ 11 VIA tech 3038 PCI to USB Universal Host Controller
IRQ 12 PS/2 Compatible Mouse Port
IRQ 13 Numeric data processor
IRQ 14 Primary IDE controller (dual fifo)
IRQ 14 VIA Bus Master PCI IDE Controller
IRQ 15 Secondary IDE controller (dual fifo)
IRQ 15 VIA Bus Master PCI IDE Controller
Audio must use this setting for game compatibility. Used for audio, MPU-401, and
volume control.
*Default configuration; other configurations are as follows:
Modem - IRQ 4, 10, 11, none
Parallel Port - IRQ 3, 4, 5, 9, 10, none
System Audio - IRQ 7, 9, 10, none
Serial Port - IRQ 3, 5, 7, 9, 10, 12, none
Page 20
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home Removal & Replacement Jumper & Switch Information Specifications
Power supply
Diskette drive
Hard drives
DVD drive
CD drives
Mouse
Fax/modem
Zip drive
System
SPECIFICATIONS
System Specifications (continued)
General system specifications
Video memory
System interrupts
System I-O
System memory
System DMA
System I/O
Low - high Description
x0000 - x000F Direct memory access controller
x0010 - x001F Motherboard resources
x0020 - x003F Programmable interrupt controller
x0040 - x0043 System timer
x0050 - x0052 Motherboard resources
x0060 - x0060 Standard 101/102-Key or Microsoft Natural Keyboard
x0061 - x0061 System speaker
x0064 - x0064 Standard 101/102-Key or Microsoft Natural Keyboard
x0070 - x0071 System CMOS/real time clock
x0072 - x0077 Motherboard resources
x0080 - x008F Direct memory access controller
x0090 - x009F Motherboard resources
x00A0 - x00BF Programmable interrupt controller
x00C0 - x00DF Direct memory access controller
x00F0 - x00FF Numeric data processor
x0170 - x0177 VIA Bus Master PCI IDE Controller
x0170 - x0177 Secondary IDE controller (dual fifo)
x01F0 - x01F7 VIA Bus Master PCI IDE Controller
x01F0 - x01F7 Primary IDE controller (dual fifo)
x0376 - x0376 VIA Bus Master PCI IDE Controller
x0376 - x0376 Secondary IDE controller (dual fifo)
x0378 - x037F ECP Printer Port (LPT1)
x03B0 - x03BB Standard PCI Graphics Adapter (VGA)
x03C0 - x03DF Standard PCI Graphics Adapter (VGA)
x03F0 - x03F5 Standard Floppy Disk Controller
x03F6 - x03F6 VIA Bus Master PCI IDE Controller
x03F6 - x03F6 Primary IDE controller (dual fifo)
x03F8 - x03FF Communications Port (COM1)
x04D0 - x04D1 Motherboard resources
x0570 - x0776 Aliases
x0778 - x077F ECP Printer Port (LPT1)
x07B0 - x0BF6 Alias of Standard PCI Graphics Adapter (VGA)
x0CF8 - x0CFF PCI bus
x0D70 - x0FF6 Alias of VIA Bus Master PCI IDE Controller
x1000 - x10FF PCI Multimedia Audio Device
x1170 - x13F6 Alias of VIA Bus Master PCI IDE Controller
x1400 - x141F VIA Tech 3038 PCI to USB Universal Host Controller
x1420 - x143F VIA Tech 3038 PCI to USB Universal Host Controller
x1440 - x1447 Primary IDE controller (dual fifo)
x1440 - x144F VIA Bus Master PCI IDE Controller
x1448 - x144F Secondary IDE controller (dual fifo)
x1570 - xEDF7 Alias of VIA Bus Master PCI IDE Controller
xEE00 - xEE7F Motherboard resources
xEE80 - xEEFF Motherboard resources
xEF00 - xEF5F Motherboard resources
xEF76 - xFFF6 Alias of VIA Bus Master PCI IDE Controller
Page 21
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home Removal & Replacement Jumper & Switch Information Specifications
Power supply
Diskette drive
Hard drives
DVD drive
CD drives
Mouse
Fax/modem
Zip drive
System
SPECIFICATIONS
System Specifications (continued)
General system specifications
Video memory
System interrupts
System I-O
System memory
System DMA
System Memory
Low and High
Memory Addresses System Function
x00000000 - x0009FFFF System board extension for ACPI BIOS
x000A0000 - x000AFFFF Standard PCI Graphics Adapter (VGA)
x000B0000 - x000BFFFF Standard PCI Graphics Adapter (VGA)
x000C0000 - x000CFFFF Standard PCI Graphics Adapter (VGA)
x000E0000 - x000FFFFF System board extension for ACPI BIOS
x00100000 - x038FFFFF System board extension for ACPI BIOS
x40000000 - x407FFFFF Standard PCI Graphics Adapter (VGA)
x40000000 - x410FFFFF VIA Tech 8501 CPU to AGP controller
x40800000 - x40FFFFFF Standard PCI Graphics Adapter (VGA)
x41000000 - x4101FFFF Standard PCI Graphics Adapter (VGA)
x41020000 -
x4102FFFF
Standard PCI Graphics Adapter (VGA)
x50000000 x53FFFFFF
VIA Tech VT501 CPU to PCI bridge
xFFF80000 - xFFFFFFFF System board extension for ACPI BIOS
System DMA
Hardware System Function (Default)
DMA 0 ECP Printer Port (LPT1)
DMA 1 (free)
DMA 2 Standard Floppy Disk Controller
DMA 3 (free)
DMA 4 Direct memory access controller
DMA 5 (free)
DMA 6 (free)
DMA 7 (free)
Page 22
United States December 31, 2002
Maintenance and Service Guide
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MSG index Product Description Troubleshooting
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Removal &
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Information
Specifications
ILLUSTRATED PARTS
NOTE:
The computer
serial number should be provided to Compaq whenever
requesting information or ordering spare parts.
Illustrated Parts
System unit
Mass storage devices
Cables
Standard board
Fax/modem
Keyboards
Monitors
Miscellaneous parts
Return kits
Documentation &
software
privacy and legal statement
Page 23
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home Removal & Replacement Jumper & Switch Information Specifications
Illustrated Parts
System unit
Mass storage devices
Cables
Standard board
Fax/modem
Keyboards
Monitors
Miscellaneous parts
Return kits
Documentation &
software
ILLUSTRATED PARTS
System Unit
Description Part Number
1
Lightpipe Spared with bezel
2
Bezel cap Spared with bezel
3
Logo plate 166183-001
4
Door assembly Spared with bezel
5
Front bezel 171287-001
155468-021 EMEA
6
Drive bay bezel, blank
(5.25" hard drive)
Spared with bezel
7
Floppy bezel Spared with bezel
8
Drive bay bezel, blank
(3.5" hard drive)
Spared with bezel
9
Filler (3.5") Spared with bezel
10
Chassis assembly 170197-001
11
PCI back bracket Spared with chassis
12
Drive cage assembly Spared with chassis
13
I/O front clip Spared with chassis
14
Front I/O USB 170077-001
155464-001 EMEA
15
Power supply
● 120W
● 145W
● 200W
● 182952-
001(EMEA)
● 127999-001
● 128017-001
16
Hood assembly 128388-001
155466-021 EMEA
privacy and legal statement
Page 24
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
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Illustrated Parts
System unit
Mass storage devices
Cables
Standard board
Fax/modem
Keyboards
Monitors
Miscellaneous parts
Return kits
Documentation &
software
ILLUSTRATED PARTS
Mass Storage
Devices
1. 100 MB Zip drive
(select models) - not
spared
2
.
3.
4.
5.
privacy and legal statement
Page 25
Maintenance and Service Guide
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Illustrated Parts
System unit
Mass storage devices
Cables
Standard board
Fax/modem
Keyboards
Monitors
Miscellaneous parts
Return kits
Documentation &
software
ILLUSTRATED PARTS
Miscellaneous Cable Kit
- 128385-001
1 Power cable - click for
country-specific part number
2 CD/DVD drive cable in cable
kit 128385-001
3 Fax/Modem cable in cable
kit 128385-001
4 CD Audio in cable kit
128385-001
5 Serial cable in cable kit
128385-001
Cables
Cables (not shown) Spare Part Number
Modem Adapter Cable 304398-xxx. Click on the box to find
the dash number for the modem
adapter cable for a specific location.
Italy 316904-061
Diskette Data Cable
Hard Drive Dual Data Cable
CD/DVD Dual Connector Cable 171290-001
Misc. Cable 171291-001
Tie Wrap 190086-001
CD Audio Cable (18-in) 174773-001
USB Data Cable 202405-001
Page 26
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home Removal & Replacement Jumper & Switch Information Specifications
Illustrated Parts
System unit
Mass storage devices
Cables
Standard board
Fax/modem
Keyboards
Monitors
Miscellaneous parts
Return kits
Documentation &
software
ILLUSTRATED PARTS
Standard Board
Description Spare Part
Number
1
System Board 166050-101
-- w/o PROC, no
dis
157070-001
-- w/o PROC, no
dis BRZ
161258-202
K6-2 System
Board
201671-001
K6-2 System
Board
202400-001
(EMEA)
2
Heat sink (Active)
with fan
Spared with
processor
3
Pentium Celeron
Processor w/Heat
sink
-- 550 MHz
-- 533 MHz
-- 500 MHz
-- 475 MHz
170072-001
170071-001
170070-001
170069-001
--533/100 MHz
--550/100 MHz
202964-001
202965-001
4
RTC Battery
5
100-MHz SDRAM
DIMM Memory
Module
32 MB
64 MB
128 MB
337372-001
179190-001
387073-001
privacy and legal statement
Page 27
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home Removal & Replacement Jumper & Switch Information Specifications
Illustrated Parts
System unit
Mass storage devices
Cables
Standard board
Fax/modem
Keyboards
Monitors
Miscellaneous parts
Return kits
Documentation &
software
ILLUSTRATED PARTS
Two examples of the types of modem used are shown. Your modem may differ slightly from
those illustrated.
Fax-modem
Description
Spare
Part
Number
1
International
56k Modem
(S)
166358-
002
2
PCI ITU
V.90 56K
Modem (E)
166386-
001
166386-
002
(LA-
excluded)
privacy and legal statement
Page 28
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home Removal & Replacement Jumper & Switch Information Specifications
Illustrated Parts
System unit
Mass storage devices
Cables
Standard board
Fax/modem
Keyboards
Monitors
Miscellaneous parts
Return kits
Documentation &
software
ILLUSTRATED PARTS
Easy Access Internet keyboard Part Number 387084-xxx or 198664-xxx. Click on the drop-down
box to find xxx for a particular region or country.
Your keyboard may differ slightly from the one illustrated.
Keyboard
For models 7476, 7477,
and 7480
privacy and legal statement
Page 29
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Specifications
Illustrated Parts
System unit
Mass storage devices
Cables
Standard board
Fax/modem
Keyboards
Monitors
Miscellaneous parts
Return kits
Documentation &
software
ILLUSTRATED PARTS
Monitors
Compaq MV 520,
15" (speakers not
shown)
341265001
Compaq MV 720,
17" (speakers not
shown)
341267001
Compaq MV920, 19"
(speakers not shown)
341269001
Page 30
United States December 31, 2002
Maintenance and Service Guide
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Illustrated Parts
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Cables
Standard board
Fax/modem
Keyboards
Monitors
Miscellaneous parts
Return kits
Documentation &
software
ILLUSTRATED PARTS CATALOG
Miscellaneous Parts
Description Spare Part
Number
1
JBL Pro Speakers 387766-001
2
Logitech
QuickCam digital
camera Not spared
3
Scroll Mouse 334689-002
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Page 31
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting
Illustrated Parts
Catalog
Home
Removal &
Replacement
Jumper & Switch
Information
Specifications
Illustrated Parts
System unit
Mass storage devices
Cables
Standard board
Fax/modem
Keyboards
Monitors
Miscellaneous parts
Return kits
Documentation &
software
ILLUSTRATED PARTS CATALOG
Return Kits
Description
Spare Part
Number
Return kit 128389-001
privacy and legal statement
Page 32
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home Removal & Replacement Jumper & Switch Information Specifications
Illustrated Parts
System unit
Mass storage devices
Cables
Standard board
Fax/modem
Keyboards
Monitors
Miscellaneous parts
Return kits
Documentation &
software
ILLUSTRATED PARTS CATALOG
Documentation & Software for 7400 models
Description Spare Part Number
Product Brick
● User's Guide
● Compaq Warranty
QuickRestore CD, 7400 Series (Windows 98)
QuickRestore CD #2, 7400 Series (Windows 98)
Suffix Month Suffix Month Suffix Month Suffix Month
-001 January -004 April -007 July -010 October
-002 February -005 May -008 August -011 November
-003 March -006 June -009 September -012 December
privacy and legal statement
Page 33
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting
Illustrated Parts
Catalog
Home
Removal &
Replacement
Jumper & Switch
Information
Specifications
REMOVAL & REPLACEMENT PROCEDURES
This section provides general service information for Compaq 7400 Series Personal Computers.
Adherence to the procedures and precautions described in this section is essential for safe and
proper service.
Removal Sequence
Before you begin
Serial number
Chassis
Power supply
Mass storage devices
Fax-modem
PCI bracket
System board
Instant On button board
Creativity Action Center
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Page 34
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting
Illustrated Parts
Catalog
Home
Removal &
Replacement
Jumper & Switch
Information
Specifications
Removal Sequence
Before you begin
Serial number
Chassis
Power supply
Mass storage devices
Fax-modem
PCI bracket
System board
Instant On button board
Creativity Action Center
REMOVAL & REPLACEMENT
PROCEDURES
Before You Begin
● Electrostatic discharge
● Service considerations
● Preparation for disassembly
privacy and legal statement
Page 35
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home Removal & Replacement Jumper & Switch Information Specifications
REMOVAL
SEQUENCE
Electrostatic
discharge
Service
considerations
Preparation for
disassembly
Serial number
Chassis
Power supply
Mass storage
devices
Fax-modem
Parallel port
assembly
PCI bracket
System board
Instant On button
board
Creativity Action
Center
REMOVAL & REPLACEMENT - BEFORE YOU BEGIN
Electrostatic Discharge
A sudden discharge of static electricity from a finger or other conductor can destroy static-sensitive
devices or microcircuitry. Often the spark is neither felt nor heard, but damage occurs. An electronic
device exposed to electrostatic discharge (ESD) may not be affected at all and will work perfectly
throughout a normal cycle. Or it may function normally for awhile and 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
The table below shows the different amounts of static electricity generated by different activities.
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 tubes 2,000 V 700 V 400 V
Removing DIPS from vinyl trays 11,500 V 4,000 V 2,000 V
Removing DIPS from Styrofoam 14,500 V 5,000 V 3,500 V
Removing bubble pack from PCBs 26,000 V 20,000 V 7,000 V
Packing PCBs in foam-lined box 21,000 V 11,000 V 5,000 V
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:
■ Protect all electrostatic parts and assemblies with conductive or approved containers
or packaging.
■ Keep electrostatic-sensitive parts in their containers until they arrive at static-free
stations.
■ 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 into 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 grounded and constructed of 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:
■ Handle drives gently, using static-guarding techniques.
■ Store drives in the original shipping containers.
■ Avoid dropping drives from any height onto any surface.
■ Handle drives on surfaces that have at least one inch of shock-proof foam.
■ 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.
Static-Shielding Protection Levels
Method
Antistatic Plastic Carbon-Loaded
Plastic
Metallized Laminate
Voltages
1,500 7,500 15,000
Grounding Workstations
To prevent static damage at the workstation, use the following precautions:
■ Cover the workstation with approved static-dissipative material. Provide a wrist strap
connected to the work surface and make sure all properly tools and equipment are
properly grounded.
■ Use static-dissipative mats, heel straps, or air ionizers to give added protection.
■ Handle electrostatic-sensitive components, parts, and assemblies by the case or PCB
laminate. Handle them only at static-free workstations.
■ Avoid contact with pins, leads, or circuitry.
■ Turn off power and input signals before inserting and removing connectors or test
equipment.
■ Use fixtures made of static-safe materials when fixtures must directly contact
dissipative surfaces.
■ Keep the work area free of nonconductive materials such as ordinary plastic
assembly aids and Styrofoam.
■ Use field service tools, such as cutters, screwdrivers, and vacuums, that are
conductive.
■ 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 bananaplug 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:
■ Antistatic tape
■ Antistatic smocks, aprons, or sleeve protectors
■ Conductive bins, and other assembly or soldering aids
■ Conductive foam
■ Conductive tabletop workstations with ground cord of 1 megohm of resistance
■ Static dissipative table or floor mats with hard tie to ground
■ Field service kits
■ Static awareness labels
■ Wrist straps and footwear straps providing 1 megohm ±10% resistance
■ Material handling packages
■ Conductive plastic bags
■ Conductive plastic tubes
■ Conductive tote boxes
■ Metal tote boxes
■ Opaque shielding bags
■ Transparent metallized shielding bags
■ Transparent shielding tubes
Page 36
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home Removal & Replacement Jumper & Switch Information Specifications
REMOVAL
SEQUENCE
Electrostatic
discharge
Service
considerations
Preparation
for
disassembly
Serial number
Chassis
Power supply
Mass storage
devices
Fax-modem
Parallel port
assembly
PCI bracket
REMOVAL & REPLACEMENT PROCEDURES - BEFORE YOU
BEGIN
Service Considerations
Tool Requirements
■ Phillips screwdriver
■ Needle-nose pliers
■ Flathead screwdriver
■ Compaq Utilities software
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.
System board
components
Instant On
button board
Creativity
Action Center
Cables and Connectors
Most cables used throughout the unit are ribbon cables. These 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 whenever possible. In
all cases, avoid bending, twisting, or tearing the cables, and ensure that they are placed in such
a way that they cannot be caught or snagged by parts being removed or replaced.
CAUTION: When servicing these computers, ensure that cables
are placed in their proper location during the reassembly process.
Improper cable placement can cause severe damage to the unit.
Ribbon Cable Positions
CD/DVD (Primary optical
storage)
CD-RW drive (Secondary
optical storage)
Diskette drive Zip drive
Creativity Action
Center
Hard drive
Page 37
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home Removal & Replacement Jumper & Switch Information Specifications
REMOVAL SEQUENCE
Electrostatic
discharge
Service
considerations
Preparation for
disassembly
Serial number
Chassis
Power supply
Mass storage devices
Fax-modem
Parallel port
assembly
PCI bracket
System board
components
Front bezel
Instant On button
board
Creativity Action
Center
REMOVAL & REPLACEMENT PROCEDURES - BEFORE
YOU BEGIN
Preparation for Disassembly
To prepare the computer for removal and replacement procedures, complete the
following steps:
1
Remove any diskettes, compact discs, or Zip disks from the computer.
2
Turn off the computer and any peripheral devices that are connected to the
computer.
CAUTION: The computer power switch should
be turned off before you disconnect any cables.
3
Disconnect the power cord from the electrical outlet, and then from the
computer.
4
Disconnect all peripheral device cables from the computer.
IMPORTANT:
During disassembly, label each cable as you remove
it. Be sure to note its position and routing.
privacy and legal statement
Page 38
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home Removal & Replacement Jumper & Switch Information Specifications
Removal Sequence
Before you begin
Serial number
Chassis
Power supply
Mass storage devices
Fax-modem
PCI bracket
System board
Instant On button board
Creativity Action Center
REMOVAL & REPLACEMENT PROCEDURES
Serial Number
The computer serial number should be provided to Compaq whenever you
request information or order spare parts. The serial number
1 is located on the
back of the computer above the power supply and also on the cover next to the
bezel.
privacy and legal statement
Page 39
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home Removal & Replacement Jumper & Switch Information Specifications
Removal Sequence
Before you begin
Serial number
Chassis
Power supply
Mass storage devices
Fax-modem
PCI bracket
System board
Instant On button board
Creativity Action Center
REMOVAL & REPLACEMENT PROCEDURES
Chassis
Removal
1
Perform
the
preparation
procedures.
2
Remove
the three
screws
from the
back of the
computer.
3
Grasp the
handle on
the back of
the
computer
chassis and
pull to
separate
the chassis
from the
cover.
4
Lift up on
the chassis
and pull it
completely
out of the
cover.
Replacement
To replace
the chassis,
reverse this
procedure.
Page 40
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home Removal & Replacement Jumper & Switch Information Specifications
Removal Sequence
Before you begin
Serial number
Chassis
Power supply
Mass storage devices
Fax-modem
PCI bracket
System board
Instant On button board
Creativity Action Center
REMOVAL & REPLACEMENT PROCEDURES
Power Supply
1
Perform preparation procedures.
2
Remove the chassis.
3
Gently lay the computer on its side with
back connectors closest to the working
surface.
4
Remove the four screws that secure the
power supply to the back of the chassis as
shown.
5
Slide the power supply away from the back
of the chassis
, rotate it up and away ,
and slide it to the right to remove it from
the slots.
6
Disconnect the power supply cables from
the system board, hard drive, floppy drive,
and CD/DVD drive and remove the cables
from the chassis.
Replacement
To replace the power supply, reverse this
procedure.
privacy and legal statement
Page 41
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home Removal & Replacement Jumper & Switch Information Specifications
Removal Sequence
Before you begin
Serial number
Chassis
Power supply
Mass storage devices
Fax-modem
PCI bracket
System board
Instant On button board
Creativity Action Center
REMOVAL & REPLACEMENT PROCEDURES
Mass Storage
Devices
1 CD/DVD/CD-
RW drive
2
3.5" Hard
drive or
5.25" Hard
drive
3
Zip drive
(available on
select
models)
4
Diskette
drive
privacy and legal statement
Page 42
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home Removal & Replacement Jumper & Switch Information Specifications
CD/DVD/CDRW drive
3.5" Hard
drive
5.25" Hard
drive
Zip drive
3.5" Diskette
drive
Mass storage
devices index
page
REMOVAL & REPLACEMENT PROCEDURES
Mass Storage
Devices
CD/DVD/CD-RW Drive
To remove a CD,
DVD, or CD-RW
that has
NOTE:
To remove the CD, DVD,
or CD-RW drive, complete
the following steps:
Removal
1
jammed in the
drive, manually
eject the disc.
Perform
preparation
procedures.
privacy and legal statement
2
Remove the cover.
3
Disconnect the
signal, power, and
audio cables from
the CD, DVD, or CDRW drive.
NEXT STEP
Page 43
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting
Illustrated Parts
Catalog
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Removal &
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Jumper & Switch
Information
Specifications
REMOVAL &
REPLACEMENT
Mass Storage
Devices
Removing a Jammed
CD, DVD or SuperDisk
(available on select
models only and not
pictured here) from the
drive.
Insert a straightened
paper clip into the
manual eject hole
and push firmly. On
select models the
eject hole is located
next to the eject
button.
Note: The manual
eject hole for the
SuperDisk is located
in the button cover of
the manual eject
button.
Page 44
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting
Illustrated Parts
Catalog
Home
Removal &
Replacement
Jumper & Switch
Information
Specifications
REMOVAL & REPLACEMENT PROCEDURES
Mass Storage
Devices
CD or DVD Drive,
continued
4
Remove the four
screws from the
sides of the CD,
DVD, or CD-RW
drive.
5
Pull the CD, DVD, or
CD-RW drive
straight out of the
front of the chassis.
Replacement
To replace the CD,
DVD, or CD-RW
drive, reverse this
procedure.
Return to
section index
Page 45
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home
CD/DVD/CDRW drive
3.5" Hard
drive
5.25" Hard
drive
Zip drive
3.5" Diskette
Drive
Mass
storage
devices
index page
Removal &
Replacement
Jumper & Switch
Information
Specifications
REMOVAL & REPLACEMENT PROCEDURES
Mass
Storage
Devices
3.5" Hard
Drive
Removal
1
Perform
preparation
procedures.
2
Remove the
chassis.
3
Remove the
power
supply.
4
Disconnect
the signal
and power
cables from
the hard
drive.
NEXT
STEP
Page 46
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting
Illustrated Parts
Catalog
Home
Removal &
Replacement
Jumper & Switch
Information
Specifications
REMOVAL & REPLACEMENT PROCEDURES
Mass storage
devices
3.5" Hard Drive,
continued
5
Remove the four
screws from the side
of the hard drive
cage.
6
Remove the hard
drive from the back
of the drive cage.
NEXT STEP
privacy and legal statement
Page 47
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting
Illustrated Parts
Catalog
Home
Removal &
Replacement
Jumper & Switch
Information
Specifications
REMOVAL & REPLACEMENT PROCEDURES
Mass storage
devices
3.5" Hard Drive,
continued
7
Disconnect the hard
drive cable from the
board.
Replacement
To replace the 3.5inch hard drive,
reverse this
procedure.
Return to index page
privacy and legal statement
Page 48
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home
Removal &
Replacement
Jumper & Switch
Information
Specifications
CD/DVD/CDRW drive
3.5" Hard
drive
5.25" Hard
drive
Zip drive
3.5" Diskette
drive
Mass
storage
devices
index page
REMOVAL & REPLACEMENT PROCEDURES
Mass
Storage
Devices
Zip Drive
1
Perform
preparation
procedures.
2
Remove the
cover.
3
Remove the
power
supply
4
Disconnect
the signal
and power
cables from
the Zip
drive.
NEXT
STEP
privacy and legal statement
Page 49
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting
Illustrated Parts
Catalog
Home
Removal &
Replacement
Jumper & Switch
Information
Specifications
REMOVAL & REPLACEMENT PROCEDURES
Mass Storage
Devices
Zip Drive Removal,
Continued
5
Remove the four
screws from the
sides of the Zip
drive.
6
Remove the Zip
drive from the front
of the drive cage
assembly.
Next Step
privacy and legal statement
Page 50
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting
Illustrated Parts
Catalog
Home
Removal &
Replacement
Jumper & Switch
Information
Specifications
REMOVAL & REPLACEMENT PROCEDURES
Mass Storage
Devices
Zip Drive Removal,
Continued
7
Remove the zip
drive cable from the
board.
Replacement
To replace the Zip
drive, reverse the
removal procedure.
Return to
index page.
privacy and legal statement
Page 51
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home
Removal &
Replacement
Jumper & Switch
Information
Specifications
CD/DVD/CDRW drive
3.5" Hard
drive
5.25" Hard
drive
Zip drive
3.5" Diskette
drive
Mass
storage
devices
index page
REMOVAL & REPLACEMENT PROCEDURES
Mass
Storage
Devices
Diskette Drive
1
Perform the
preparation
procedures.
2
Remove the
cover.
3
Remove the
power
supply.
4
Disconnect
the signal
and power
cables from
the diskette
drive.
NEXT
STEP
privacy and legal statement
Page 52
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting
Illustrated Parts
Catalog
Home
Removal &
Replacement
Jumper & Switch
Information
Specifications
REMOVAL & REPLACEMENT PROCEDURES
Mass Storage
Devices
Diskette Drive,
continued
5
Remove the four
screws from the
sides of the drive
bracket.
6
Remove the drive
from the front of the
drive age assembly.
Replacement
To replace the
diskette drive,
reverse this
procedure.
Return to section index
page
Page 53
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home Removal & Replacement Jumper & Switch Information Specifications
Removal Sequence
Before you begin
Serial number
Chassis
Power supply
Mass storage devices
Fax-modem
PCI bracket
System board
Instant On button board
Creativity Action Center
REMOVAL & REPLACEMENT PROCEDURES
Fax/modem
Removal
1
Perform
preparation
procedures.
2
Remove the
chassis.
3
Remove the
power
supply.
4
Remove the
screws
holding the
option card
bracket to
the chassis.
5
Remove the
bracket and
pull the
fax/modem
out of the
slot.
NOTE: Select
models may
contain an
Ethernet
network card.
Replacement
To replace
the
fax/modem,
reverse this
procedure.
Page 54
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home Removal & Replacement Jumper & Switch Information Specifications
Removal Sequence
Before you begin
Serial number
Chassis
Power supply
Mass storage devices
Fax-modem
PCI bracket
System board
Instant On button board
Creativity Action Center
REMOVAL & REPLACEMENT PROCEDURES
PCI Bracket
Removal
1
Perform
preparation
procedures.
2
Remove
the chassis.
3
Gently lay
the
computer
on its side
with back
connectors
closest to
the working
surface.
4
Remove
the two
screws that
secure the
PCI bracket
to the back
of the
chassis.
5
Remove
the
bracket.
Replacement
To replace
the PCI
bracket,
reverse this
procedure.
Page 55
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting
Illustrated Parts
Catalog
Home
Removal &
Replacement
Jumper & Switch
Information
Specifications
Removal Sequence
Before you begin
Serial number
Chassis
Power supply
Mass storage devices
Fax-modem
PCI bracket
System board
Instant On button board
Creativity Action Center
REMOVAL & REPLACEMENT
PROCEDURES
System Board Components
Fan/Heat sink & processor
Memory module
RTC battery
System board components
privacy and legal statement
Page 56
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home Removal & Replacement Jumper & Switch Information Specifications
Fan/Heat sink
& processor
Memory module
RTC battery
System board
components
System board
components
index page
REMOVAL & REPLACEMENT PROCEDURES
System
Board
Components
Fan/Heat Sink
and processor
Removal
1
Perform
preparation
procedures.
2
Remove the
chassis.
3
Remove the
power
supply.
4
Locate the
heat sink
clip
release the
clip from the
heat sink .
5
Lift the heat
sink clip and
remove
the heat
sink from
the system
board.
Next step
and
Page 57
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home Removal & Replacement Jumper & Switch Information Specifications
Fan/Heat sink
& processor
Memory
module
RTC battery
System board
components
System board
components
index page
REMOVAL & REPLACEMENT PROCEDURES
System
Board
Components
Processor
Removal
1
Perform
preparation
procedures.
2
Remove the
chassis.
3
Remove the
power
supply.
4
Remove the
Fan/heat
sink.
5
Lift the
socket lever
and
remove
the processor
from the
socket.
Replacement
To replace
the
processor,
reverse this
procedure.
Page 58
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home Removal & Replacement Jumper & Switch Information Specifications
Fan/Heat sink &
processor
Memory module
RTC battery
System board
components
System board
components index
page
REMOVAL & REPLACEMENT PROCEDURES
System
Board
Components
Memory
Module
(DIMM)
Removal
1
Perform
preparation
procedures.
2
Remove the
chassis.
3
Remove the
power
supply.
4
Remove
mass
storage
devices.
5
Release the
retention
clips of the
socket
and unplug
the DIMM
from the
system
board .
Replacement
To replace the
DIMM, reverse this
procedure.
Page 59
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home Removal & Replacement Jumper & Switch Information Specifications
Fan/Heat
sink &
processor
Memory
module
RTC battery
System
board
components
System
board
components
index page
REMOVAL & REPLACEMENT PROCEDURES
System Board Components
RTC Battery
Removal
1
Perform preparation procedures.
2
Remove the chassis.
3
Remove the power supply.
4
Locate the RTC battery.
5
Push out the socket lever
and
slide the RTC battery out of the
socket.
Replacement
To replace the RTC battery, reverse this
procedure.
WARNING: The clock/CMOS
lithium battery may explode
if mistreated. Do not abuse.
Use only replacement
batteries supplied by Compaq
Computer Corporation.
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Fan/Heat sink
& processor
Memory
module
RTC battery
System board
components
System board
components
index page
REMOVAL & REPLACEMENT PROCEDURES
System Board
Components
System Board
Removal
1
Perform
preparation
procedures.
2
Remove the
chassis.
3
Remove the
power supply.
4
Remove hard
drive.
5
Remove the
fax/modem.
6
Remove the
processor.
7
Remove the
memory module.
8
Remove all cables
from the system
board.
9
Remove the six
screws from the
system board
(may differ
slightly from
illustration) and
separate it from
the bracket.
Replacement
To replace the
system board,
reverse this
procedure.
NOTE:
The system
board spare
part kit
does not
include the
processor,
cache,
DIMM, or
video
expansion
module.
The
components
must be
transferred
from the
old system
board to
the new
system
board.
Page 61
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Removal Sequence
Before you begin
Serial number
Chassis
Power supply
Mass storage devices
Fax-modem
PCI bracket
System board
Instant On button board
Creativity Action Center
REMOVAL & REPLACEMENT PROCEDURES
Instant On
Button
Board
Removal
1
Perform
preparation
procedures.
2
Remove
the chassis.
3
Remove
the two
screws
from the
button
assembly.
Next Step
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Removal Sequence
Before you begin
Serial number
Chassis
Power supply
Mass storage devices
Fax-modem
PCI bracket
System board
Instant On button board
Creativity Action Center
REMOVAL & REPLACEMENT PROCEDURES
Instant On Button Board, continued
Removal,
continued
3
Remove
the
assembly
from the
back of
front
bezel.
4
Remove
the Button
Board
cable from
the system
board.
Replacement
To replace the
button board
assembly,
reverse this
procedure.
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Home Removal & Replacement Jumper & Switch Information Specifications
Removal Sequence
Before you begin
Serial number
Chassis
Power supply
Mass storage devices
Fax-modem
PCI bracket
System board
Instant On button board
Creativity Action Center
REMOVAL & REPLACEMENT PROCEDURES
Creativity
Action
Center (available
on select
models
only)
Removal
1
Perform
preparation
procedures.
2
Remove
the cover.
3
Remove
the gasket
from the
Creativity
Action
Center (not
shown).
4
Remove
the screw
holding the
Creativity
Action
Center port
to the
chassis.
5
Release the
top clip by
sliding the
Creativity
Action
Center port
to the left
and push it
in to
remove it.
Next Step
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REMOVAL & REPLACEMENT
Creativity Activity Center, continued
6
Disconnect the
cable from the
Creativity Action
Center.
7
Remove the
Creativity Action
Center cable from
the board.
Replacement
To replace the
Creativity Action
Center, reverse
this procedure.
Page 65
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JUMPER & SWITCH INFORMATION - INDEX PAGE
Jumper & Switch Information
System board
Hard drive
CD drive
DVD drive
CD-RW
Zip drive (available on select
models)
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DVD drive
CD drive
Zip drive
JUMPER & SWITCH INFORMATION
System Board Index
● System board connectors
● Jumper settings
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DVD drive
CD drive
Zip drive
JUMPER & SWITCH INFORMATION
System Board Connectors
Click on an item number to identify the system board component.
Number Function Description
Reference
Designator
1
Diskette
Drive
34-pin FDD1
2
Primary
IDE Drive
40-pin IDE1
3
Secondary
IDE Drive
40-pin IDE2
4
Front I/O
Panel
10-pin USB2
5
Button
Board
20-pin J2
6
N/A
7
Processor
Bus
Frequency
Jumper
4, 2-pin JP12-15
8
CMOS 3-pin JP3
9
Battery
Socket
Battery
holder
BAT1
10-
12,14
PCI Slots
32-bit PCI
connector
PCI 1 to 4
13
CD Audio 4-pin CD1
15
Fan 3-pin Fan1
16
N/A
17
Socket 7 321-pin PGA U6
18
Power
Supply
20-pin CN1
19
CPU Core
Voltage
Select
5, 2-pin JP7-11
20
Clock
Multiplier
3, 2-pin JP4-6
21-23
DIMM
Sockets
168-pin
DIMM
DIMM 1 to
3
24
Mouse
Miniature 6pin
PS1 (1/2)
25
Keyboard
Miniature 6pin
PS1 (1/2)
26
Back USB Dual 4-pin USB1
27
Serial Port DSUB 9-pin Con1
28
Parallel
Port
DSUB 25pin
PJ1
29
VGA
Connector
DSUB 15pin
VGA1
30
Line Out Mini Stereo Game1D
31
Line In Mini Stereo Game1B
32
Microphone Mini Stereo Game1C
33
Game Port
DSUB 15pin
Game1A
Page 68
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JUMPER & SWITCH INFORMATION
Jumper Settings
● Jumper 3 (CMOS)
● Jumpers 4-6 (Multiplier)
● Jumpers 7-11 (Core Voltage Setting)
● Jumpers 12-15 (Clock Speed)
Jumper 3
CMOS Normal CMOS Clear
pins 1-2 pins 2-3
Jumpers 4-6
JP4 JP5 JP6
CPU/Host
Ratio
ON ON OFF 2.5
OFF ON OFF 3.0
ON OFF OFF 2.0
OFF OFF OFF 1.5/3.5
ON ON ON 4.5
OFF ON ON 5.0
ON OFF ON 4.0
OFF OFF ON 5.5
Jumpers 7-10
JP10 JP9 JP8 JP7 VCC2
OFF OFF OFF OFF 0
OFF OFF OFF ON 2.1
OFF OFF ON OFF 2.2
OFF OFF ON ON 2.3
OFF ON OFF OFF 2.4
OFF ON OFF ON 2.5
OFF ON ON ON 2.6
OFF ON ON ON 2.7
ON OFF OFF OFF 2.8
ON OFF OFF ON 2.9
ON OFF ON OFF 3.0
ON OFF ON ON 3.1
ON ON OFF OFF 3.2
ON ON OFF ON 3.3
ON ON ON OFF 3.4
ON ON ON ON 3.5
Jumpers 12-15 CPU
15 14 13 12
OFF OFF OFF ON 66.6
OFF ON ON OFF 95.25
OFF ON OFF OFF 97
OFF ON ON ON 100
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JUMPER & SWITCH INFORMATION
3.5" Hard Drives
Compaq Computer Corporation uses IDE hard disk drives that conform to
two different device 0/device 1 implementations. These are Conner mode
and ATA-compatible mode. These two modes are incompatible with one
another.
Seagate jumper settings are shown below.
This link is for 5.25" hard
drive jumper settings
3.5" Hard Drive Jumper Settings
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JUMPER & SWITCH INFORMATION
5.25" Hard Drive
5.25" Hard Drive Jumper Settings
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JUMPER & SWITCH INFORMATION
Jumper & Switch
Information
DVD Drive
DVD drive
CD drive
Zip drive
Illustrated Parts
Catalog
Specifications
Page 72
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Hard
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DVD drive
CD drive
Zip drive
JUMPER & SWITCH INFORMATION
CD Drive
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Zip drive
JUMPER & SWITCH INFORMATION
Zip drive
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SPECIFICATIONS - INDEX PAGE
This section provides physical, environmental, and performance specifications for Compaq
7400 Series Personal Computers.
System
Power supply
Diskette drive
Hard drive
DVD drive
CD drive
Mouse
Fax-modem
Zip drive
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Mouse
Fax/modem
Zip drive
SPECIFICATIONS
Power Supply
U. S. Outside U. S.
Input Specifications
Nominal Line
Voltage
100 to 120 VAC 220 to 240 VAC
Range Input
Line
90 to 132 VAC 180 to 264 VAC
Frequency
Range
47 to 63 Hz 47 to 63 Hz
Input Power 210 Watts 210 Watts
Input Current 4.5 at 90 VAC 2.2 at 180 VAC
Holdup Time 16 ms from zero
crossing at 120 VAC
16 ms from zero
crossing at 240 VAC
General Specifications
Full Output
Rating
To 122° F and 5,000
ft
To 90° F and 10,000
ft (derate linearly)
To 50° C and 1524
m
To 32° C and 3048
m (derate linearly)
Minimum Load 1.0 A on + 5.0 V
output
0.2 A on 12 V output
1.0 A on + 5.0 V
output; 0.2 A on 12
V output
Ambient Temperature Range
Operating 50° to 122° F 10° to 50° C
Storage -40° to 151° F -40° to 66° C
Dielectric Voltage Withstand
Input to
Ground
1500 VAC/1 second
Safety Standard
UL 1950; CSA 22.2 #950 or CSA 22.2
#234; TUV/VDE EN 60 950
(VDE0805/11.91); EMKO-TSE (74-SEC)
207/93
Input Transient Susceptibility
Common and
Differential
Mode
(superimposed
on AC line)
2500 V, 1 µs, damped sinusoidal
600 V, 10 µs pulse
Differential
Mode
20% step change in AC input voltage
Page 76
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SPECIFICATIONS
Diskette Drive
Diskettes
Size (in) 3.5 (8.89 cm)
High
Density
(MB)
1.44
Low
Density
(KB)
720
Light
Green
Height
One-third
Bytes per Sector
512
Sectors per Track
High
Density
18
Low
Density
9
Tracks per Side
High
Density
80
Low
Density
80
Read/Write Heads
2
Average Seek Time (ms)
Track-toTrack
3
Average 94
Settling
Time
15
Latency
Average
100
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System
SPECIFICATIONS
Western Digital hard drives
Click link for specifications on Seagate or Quantum hard drives.
Western Digital Hard Drives - 3.5"
8.4-GB 10.0-GB 13.0-GB
Compaq Part Number
148611001
144364001
144365001
Formatted Capacity
Physical (MB) 8455.2 MB 10005 MB 13520.1
MB
Data Transfer Rate
Disk to Buffer (Mb/second)
Interface w/o IORDY
Interface w/ IORDY
UDMA
87.9 -
233.57
12.5
16.6
66.6
87.9 -
233.57
12.5
16.6
66.6
87.9 -
233.57
12.5
16.6
66.6
Typical Seek Time
(including settling)
Track to Track (ms)
Average (ms)
Full Stroke (ms)
2.0 - 5.0
9.5 - 15.0
19 - 23
2.0 - 5.0
9.5 - 15.0
19 - 23
2.0 - 5.0
9.5 - 15.0
19 - 23
Disk Rotational Speed (RPM)
5400 +/-
0.5
percent
5400 +/-
0.5
percent
5400 +/-
0.5
percent
Data Cylinders
Physical
Logical
16579
16383
16579
16383
16579
16383
Data Heads/ Cylinder
Physical
Logical
3
16
3
16
4
16
Sectors per Track
Physical
Logical
282 - 504
(20 zones)
63
282 - 504
(20 zones)
63
282 - 504
(20 zones)
63
Page 78
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DVD drive
CD drives
Mouse
Fax/modem
Zip drive
System
SPECIFICATIONS
Seagate hard drives
Click link for specifications on Quantum or Western Digital hard drives.
Seagate Hard Drives - 3.5"
8.4-GB 10.0-GB 13.0-GB 13.0-GB 17.0-GB
Compaq Part Number
112224-001 116193-001 143873-001 116194-001 116195-001
Formatted Capacity
Physical (MB)
Logical (MB)
8640 MB
8455 MB
10005 MB
8455 MB
13520
8455
13022
13022
17245 MB
17245 MB
Transfer Rate
Disk to Buffer (Mbits/sec)
Interface (Mbytes/sec)
IORDY
DMA
UDMA
105.15-222.87
16.6
16.6
66.6
188 Max.
16.6
16.6
66.6
323 Max.
16.6
16.6
66.6
171 Max.
16.6
16.6
33.3
188 Max.
16.6
16.6
66.6
Typical Seek Time
(including settling)
Single Track (ms)
Average (ms)
Full Stroke (ms)
1.3 - 2.1
9.0 - 10.5
18 - 20
2.0 - 2.4
10.5 - 11.5
24 - 26
1.5 - 3.0
9 - 12
18 - 20
1.5 - 3.0
9 - 12
18 - 20
1.3 - 2.1
9 - 10.5
18 - 20
Disk Rotational Speed (RPM)
5400 +/- 0.1
percent
5400 +/- 0.2 percent 7200 +/-
0.2 percent
5400 +/- 0.2
percent
5400 +/- 0.2 percent
Data Cylinders
Physical
Logical
12210 (+/-)
16383
12561
16383
15399
16383
12561
16383
12561
16383
Data Heads/ Cylinder
Physical
Logical
3
16
8
16
4
16
6
16
8
16
Sectors per Track
Physical
Logical
244-437 nom
63
244-416 (10 zones)
63
316-508
(10 zones)
63
245-421 (10
zones)
63
244-416
(10 zones)
63
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System
SPECIFICATIONS
Quantum hard drives
Click links for specifications on Seagate or Western Digital hard drives.
Quantum Hard Drives - 3.5"
8.4-GB 10.0-GB 13.0-GB
Compaq Part Number
122258001
138224001
138225001
Formatted Capacity
Physical (MB)
Logical (MB)
8640 MB
8455 MB
10020 MB
10020 MB
13020 MB
13020 MB
Data Transfer Rate
Head (Mb/second)
Zone 1
Zone 15
Interface (Mbytes/sec)
121.9
194.9
66
148.8
241.9
66
121.9
194.9
66
Typical Seek Time
(including settling)
Track to Track (ms)
Average (ms)
Full Stroke (ms)
1.5 - 2.0
11 - 13
18 - 22
1.5 - 2.0
11 - 13
18 - 22
1.5 - 2.0
11 - 13
18 - 22
Disk Rotational Speed (RPM)
5400 5400 5400
Data Cylinders
Physical
Logical
12515
16383
16383
16383
12515
16384
Data Heads/ Cylinder
Physical
Logical
4
16
3
16
6
16
Sectors per Track
Physical
Logical
250-403
(15 zones)
63
307-512
(15 zones)
63
250-403
(15 zones)
63
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SPECIFICATIONS
DVD3, 6x/10x Drive
Dimensions U. S. Metric
Width
Height
Depth
5.74 in
1.68 in
8.23 in
14.60 cm
4.29 cm
20.80 cm
Weight
1.80 lb 0.9 kg
Applicable Disc Formats
DVD-5,
DVD-9,
DVD-10,
DVD-18
CD-ROM
CD-DA
CD-XA
Photo CD
CD-I
Ready
CD-Bridge
CD-R
Mode 1 and Mode 2
Audio
Mode 2, Form 1 and 2
Single and Multiple Session
Block Size
CD-ROM
Mode 0
CD-ROM
Mode 1
CD-ROM
Mode 2
DVD
2352 bytes
2352, 2340,2336, 2048
bytes
2352,2340, 2336, 2048
bytes
2048 bytes
Center Hole
15 mm diameter
Disc Diameter
12 cm, 8 cm
Thickness
1.2 mm
Track Pitch
1.6 µm (CD-ROM); 0.74 µm
(DVD)
Access Time
Random
Full Stroke
DVD:
< 180 ms
typical
< 300 ms
CD:
< 120 ms
< 200 ms
Audio Output Level
Line Out
Headphone
1.0 V (RMS) at 47 kW
0.7 V (RMS) at 32 W
Cache Buffer
512 Kb
Sustained Data
Transfer Rate
150 KB/sec (1x CD-ROM
mode)
1200-3600 KB/sec (32× CAV
CD-ROM mode)
2705-8115 KB/sec (6x CAV
DVD mode)
Interface Cable
Length (Max)
18 in
Typical Startup Time
< 10 sec
Typical Stop Time
< 2 sec
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SPECIFICATIONS
CD Drives (including CD-RW)
32× CD Drive
Dimensions U. S. Metric
Width
Height
Depth
5.75 in
1.67 in
8.23 in
150.1 mm (maximum)
42.9 mm (maximum)
208.0 mm (maximum)
Weight
2.65 lb 1200 grams
Applicable Disc
CD-ROM
CD-DA
CD-R/W
CD-XA
Photo CD
Modes 1 and 2
Audio
Mode 2, Form 1 and 2
Single and Multiple Session
Block Size
CD-ROM Mode 1
CD-ROM Mode 2
CD-DA
CD-XA
2048 bytes
2340, 2336 bytes
2352 bytes
2328 bytes
Diameter
12 cm, 8 cm (drive must support 8 cm adapters)
Thickness
1.2 mm
Track Pitch
1.6 µm
Laser
Divergence Angle
Output Power
Type
Wave Length
53.5 degrees +/- 1.5 degrees
0.14 mW (@ objective lens)
Semiconductor laser GaAIAs
780 nm +/- 25 nm
Access Time
Random
Full Stroke
< 100 ms (typical)
< 150 ms (typical)
Audio Output Level
Line Out 0.7 V (RMS)
Cache Buffer
128 KB (minimum)
Data Transfer Rate
Sustained 150 kB/s (IX, using audio disc)
2100 to 4800 kB/s (14X to 32X variable, w/650 MB
disc)
Bus Rate
Burst 4.0 MB/s minimum
Startup Time (Single)
< 7 sec (typical)
Startup Time (Multisession)
< 30 sec (typical)
Stop Time
< 4 sec
CD-RW
Dimensions U. S. Metric
Width
Height
Depth
5.75 in
1.67 in
8.23 in
150.1 mm (maximum)
42.9 mm (maximum)
208.0 mm (maximum)
Weight
2.65 lb 1200 grams
Applicable Disc
CD-ROM
CD-DA
CD-ROM XA
Photo CD
CD-I
CD EXTRA
CD-R/W
Video CD
CD-TEXT
Modes 1 and 2
Audio
Mode 2, Form 1 and 2
Single and Multi Session
Mode 2, Form 1 and 2
Read Only Block Size
CD-ROM Mode 1
CD-ROM Mode 2 Form 1
CD-ROM Mode 2 Form 2
CD-DA
2048 and 2352 bytes
2048, 2328, 2336, 2340, and 2352 bytes
2328, 2336, 2340, and 2352 bytes
2352 and 2368 bytes
Writeable Block Size
CD-ROM Mode 1
CD-ROM Mode 2 Form 1
CD-ROM Mode 2 Form 2
CD-DA
2048 bytes
2048 and 2352 bytes
2352 bytes
2352 and 2368 bytes
Diameter
12 cm, 8 cm (drive must support 8 cm adapters)
Thickness
1.2 mm
Track Pitch
1.6 µm
Laser
Divergence Angle
Output Power
Type
Wave Length
53.5 degrees +/- 1.5 degrees
0.14 mW (@ objective lens)
Semiconductor laser GaAIAs
780 nm +/- 25 nm
Access Time
Random
Full Stroke
150 ms (typical)
350 ms (typical)
Audio Output Level
Line Out 0.7 V (RMS)
Cache Buffer
1 Mbyte (minimum)
Data Transfer Rate
Sustained 150 kB/s (1X, read/write), 300 KB/s (2X,
read/write),
600 KB/s (4X, read/write), 1200 KB/s (8X, read),
Variable 1500 to 3600 KB/s (10X to 24X, read)
Bus Rate
Burst 4.0 MB/s minimum
Startup Time (Single)
< 7 sec (typical)
Startup Time (Multisession)
< 30 sec (typical)
Stop Time
< 4 sec
Page 82
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting
Illustrated Parts
Catalog
Home
Removal &
Replacement
Jumper & Switch
Information
Specifications
System
Power supply
Diskette drive
Hard drives
DVD drive
CD drives
Mouse
Fax/modem
Zip drive
SPECIFICATIONS
Mouse
Dimensions
U. S. Metric
Height
Length
Width
1.22 in
3.94 in
2.21 in
3.1 cm
10 cm
5.6 cm
Weight
2.9 oz 85 g
Base Resolution
400 DPI
Tracking Speed
(maximum)
10 in/sec 25 cm/sec
Temperature
Operating
Storage
32° F to 104°
F
-4° F to 140°
F
0° C to 40° C
-20° C to 60°
C
Lifetime
Mechanical
Switch
Exceeds 300
miles
Exceeds 1
million
operations
Exceeds 483
km
Exceeds 1
million
operations
Relative Humidity
10% to 90%, noncondensing
ESD
No soft errors through 6 kV;
No hard errors through 6 kV;
specific performance depends
on host system
Page 83
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting
Illustrated Parts
Catalog
Home
Removal &
Replacement
Jumper & Switch
Information
Specifications
System
Power supply
Diskette drive
Hard drives
DVD drive
CD drives
Mouse
Fax/modem
Zip drive
SPECIFICATIONS
Fax-modem
Conexant HCF V.90
56K Data Fax PCI
Modem
Supra Express 56i PRO
Maximum Data
Speed (kbps)
56* 56*
Data
V.90, K56Flex, V.34,
V.32terbo, V.32bis,
V.32, V.22bis, V.22,
V.21, Bell 212A, Bell
103
V.90, K56Flex, V.34,
V.32terbo, V.32bis, V.32,
V23, V.22bis, V.22,
V.21, Bell 212A, Bell 103
Error Correction
V.42bis,V.42, LAPM, and
MNP 2-5
V.42, LAPM, and MNP 24
Fax
V.17 (14.4 kbps
transmission speed)
V.29, V.27ter, V.21
Channel 2, Class 1
command set, Group III
FAX
V.17 (14.4 kbps
transmission speed)
V.29, V.27ter, V.21
Channel 2, Group III
FAX, Class 1 interface
* Both K56flex and V.90 are designed only to allow faster downloads
from either K56flex or V.90 compliant digital sources. Maximum
achievable download transmission rates are currently unknown, may not
reach 56kbps, and will vary with line conditions.
** The G.Lite DSL protocol is designed to allow faster downloads from
G.Lite DSL-compliant digital sources. Maximum achievable download
transmission rates are currently unknown, may not reach 1.5Mbps, and
will vary with line conditions and distance from the telephone company
central office.
Page 84
United States December 31, 2002
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting
Illustrated Parts
Catalog
Home
Removal &
Replacement
Jumper & Switch
Information
Specifications
System
Power supply
Diskette drive
Hard drives
DVD drive
CD drives
Mouse
Fax/modem
Zip drive
SPECIFICATIONS
Zip Drive
Total formatted capacity (bytes) 100,663,296
Sector size (bytes) 512
Total number of sectors 196,608
Number of reassignable spare sectors 252
Seek times (including settling), ms:
Average
Track-to-track
Maximum
29
5
55
Average latency, ms 10
Motor speed, rpm 2941±5%
Motor start time, ms 3000
Track density, tpi 2118
Track width, µm 12
Transfer rate, kb/s:
From diskette
Buffer (maximum)
790-1400 kb/sec
3.3 MB/sec
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