Compaq Presario 7800 Series, Presario 5900T Maintenance & Service Manual

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United States December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home Removal & Replacement Jumpers & Switches Specifications
Troubleshooting
Illustrated Parts
Removal & Replacement
Jumpers & Switches
Specifications
Welcome to the Presario 7800 Series and 5900T Maintenance and Service Guide. This online guide is designed to serve the needs of those whose job it is to repair Compaq products. Many of the components of the hardcopy MSG are contained in this online guide. The
Notice contains the copyright and trademark information.
The Preface shows symbol conventions, Technician Notes and Serial Number locations on the unit.
Download a ZIP file of the complete MSG to local 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 the Editor.
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privacy and legal statement
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Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
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.
© 1998 Compaq Computer Corporation. All rights reserved. Printed in the U.S.A.
Compaq, Presario Registered U. S. Patent and Trademark Office.
Microsoft, MS-DOS, and Windows are registered trademarks of Microsoft Corporation. Windows 95 is a trademark of Microsoft Corporation. Windows 98 is a trademark of Microsoft Corporation.
The software described in this guide is furnished under a license agreement or nondisclosure agreement. The software may be used or copied only in accordance with the terms of the agreement.
Product names mentioned herein may be trademarks and/or registered trademarks of their respective companies.
Maintenance and Service Guide
Compaq Presario 7800 Series and 5900T Personal Computers
© 2000 Compaq Computer Corporation
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Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
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Symbols
The following words and symbols mark special messages throughout this guide.
WARNING: Text set off in this manner indicates that failure to follow directions in
the warning could result in bodily harm or loss of life
.
CAUTION: Text set off in this manner indicates that failure to follow directions in the caution 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 back of the computer next to the fan
grill and on the front bezel behind the drive access door.
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
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United States December 31, 2002
Maintenance & Service Guide
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Product Description
Product Description
Models and Features CPU Controls & Lights Keyboards CPU Back Connectors Digital Creativity
Imaging Center (DCIC) Power Management Power Cord
Requirements
This section describes the models and features of the Compaq Presario 7800 Series of personal computers. Use the navigation bar at left to find specific features.
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United States December 31, 2002
Maintenance & Service Guide
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Troubleshooting
Troubleshooting
Clearing CMOS Power-On Self-Test (POST) Diagnostics Software Troubleshooting Without Diagnostics
This section provides troubleshooting information for Compaq Presario 7800 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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Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
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Illustrated Parts
System Unit Mass Storage Cables Boards Modems Keyboards/Mouse Monitors Return Kits Documentation
This section provides illustrated parts and a reference for spare parts numbers for Compaq Presario 7800 Series Personal Computers.
When requesting information or ordering spare parts, the computer
serial number should be provided to Compaq. The
serial number is displayed on the back of the chassis and behind the drive cover.
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Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home Removal & Replacement Jumpers & Switches Specifications
Removal and Replacement
Removal Sequence
Preparation for Disassembly Serial Number Location Chassis Mass Storage Devices Button Board Digital Creativity Imaging Center Option Card Retainer Graphics Board PCI Cards Memory Processor RTC Battery System Board Cables System Board Back I/O Panel Power Supply
This chapter provides general service information for Compaq Presario 7800 Series Personal Computers. Adherence to the procedures and precautions described in this chapter is essential for proper service.
The topics discussed in this section include the following:
Electrostatic Discharge
Generating Static
Preventing Electrostatic Damage to Equipment
Preventing Damage to Drives
Grounding Methods
Grounding Workstations
Grounding Equipment
Recommended Materials and Equipment
Tool Requirements
Screws
Cables and Connectors
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 a while, then degrade in the internal layers, reducing its life expectancy.
Networks built into many integrated circuits provide some protection, but in many cases, the discharge contains enough power to alter device parameters or melt silicon junctions.
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Generating Static
The accompanying table shows typical electrostatic voltages generated by different activities.
Typical Electrostatic Voltages
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.
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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 electronic-sensitive parts from assemblies in protective
packaging or conductive foam.
Use transporters and conveyors made of antistatic belts and metal roller
bushings. Mechanized equipment used for moving materials must be wired to ground and proper materials selected to avoid static charging. When grounding is not possible, use an ionizer to dissipate electric charges.
The accompanying table shows typical static-shielding protection levels afforded by different protective packaging materials.
Static-Shielding Protection Levels
Method Voltages
Antistatic Plastic 1,500 Carbon-Loaded Plastic 7,500 Metallized Laminate 15,000
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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 1 inch of shock-proof foam.
Always place drives PCB-assembly side down on the foam.
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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 foot straps and a grounded floor mat.
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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 properly grounded
tools and equipment.
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 work area free of nonconductive materials such as ordinary plastic
assembly aids and Styrofoam.
Use field service tools that are conductive, such as cutters, screwdrivers,
vacuums.
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.
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Grounding Equipment
Use the following equipment to prevent static electricity damage to the equipment:
Wrist straps are flexible straps with a minimum of 1 mega ohm ± 10%
resistance to the ground cords. To provide proper ground, a strap must be worn snug against the skin. On grounded mats without banana-plug connectors, connect a wrist strap with alligator clips.
Heelstraps/toestraps/bootstraps can be used at standing workstations and
are compatible with most types of boots and shoes. On conductive floors or dissipative floor mats, use them on both feet with a minimum of 1 mega ohm resistance between operator and ground. To be effective, the conductive strips must be worn in contact with the skin.
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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 mega ohm
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 mega ohm (±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
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Tool Requirements
Torx T-8, T-10, and T-15 screwdrivers
Needle-nose pliers
Flat-blade screwdriver
Diagnostics software
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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.
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Cables and Connectors
Most cables used throughout the unit are ribbon cables. These cables must be handled with extreme care to avoid damage.
Apply only the tension required to seat or unseat the cables during insertion or removal from the connector. Handle cables by the connector whenever possible. In all cases, avoid bending, twisting, or tearing the cables, and ensure that cables are placed in such a way that they cannot be caught or snagged by parts being removed or replaced.
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.
Optical Drive
Digital Creativity Imaging Center
3.5-Inch Hard Drive
Zip Drive Diskette Drive
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Jumper and Switch Information
Jumper & Switch Information
7800 and 5900T Models with Pentium III System Board
Mass Storage
3.5-Inch Hard Drive
5.25-Inch Hard Drive DVD Drive CD Drive
This section contains jumper and switch information for system board jumpers, system I/O board connectors, and Mass Storage drives.
Click on a selection on the left navigation bar for jumper and switch information.
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Specifications
Specifications
System Specifications
Video Memory System Interrupts System I/O System Memory System DMA Power Supply Diskette Drive DVD Drive IDE Hard Drives Mouse Fax/Modem CD-RW Drive
Compaq Presario 7800 Series Personal Computer specifications are listed in the following tables. Select the specification you are interested in from the navigation bar in left column.
System Specifications
U. S. Outside U. S.
Dimensions
Height 19.0 in
482.60 mm
Depth 20.9 in
530.86 mm
Width 8.38 in
212.73 mm
Weight
31 lb
14.09 kg
Shipping Weight
Gross
41 lb 18.64 kg
Average Net
31 lb 14.09 kg
Input Requirements
Nominal Line Voltage
100 to 120 VAC 220 to 240
VAC
Range Line Voltage
90 to 132 VAC 180 to 264
VAC
Line Frequency
47 to 63 Hz 47 to 63 Hz
Input Current (S)
5.2 at 90 VAC 3.6 at 180 VAC
Input Current (A)
8.0 at 90 VAC 4.0 at 180 VAC
Power (watts) Steady State (S)
200 W at 50° C 235 W at 25° C
200 W at 50° C 235 W at 25° C
Steady State (A)
200 W at 50° C 250 W at 25° C
200 W at 50° C 250 W at 25° C
Environmental Requirements Temperature
Operating
50° to 95° F 10° to 35° C
Shipping
-4° to 140° F -20° to 60° C
Humidity (noncondensing)
Operating
8% to 90% 8% to 90%
Non-operating
5% to 95% 5% to 95%
Maximum Altitude (unpressurized)
Operating
10,000 ft 3048 m
Nonoperating
30,000 ft 9144 m
Expansion Slots
5 PCI 1 AGP
*This number will increase if more bay/slots are occupied.
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Diamond Stealth III S540 Video Memory
Resolution Color Depth (bpp) Vertical Refresh (Hz) 640 × 480 8, 16, 32 60, 72, 75, 85, 160 800 × 600 8, 16, 32 60, 72, 75, 85, 160 1024 × 768 8, 16, 32 60, 72, 75, 85, 160 1152 × 864 8, 16, 32 75 1280 × 1024 8, 16
60, 75, 85, 100
1280 × 1024 32
60, 75, 85
1600 × 1200 8, 16
60, 75, 85
1600 × 1200 32
60
* The Compaq FP720 display supports a maximum resolution of 1024x768 and only supports the 60 Hz refresh rate. The Compaq Presario MV520 Multimedia Monitor supports a maximum resolution of 1024x768, which is displayed only at the 60 Hz refresh rate. The Compaq Presario MV720 Multimedia Monitor supports a maximum resolution of 1280x1024, which is displayed only at the 60 Hz refresh rate. The Compaq Presario MV920 Multimedia Monitor supports a maximum resolution of 1600x1200, which is displayed at up to the 75 Hz refresh rate.
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System Interrupts
Hardware IRQ System Function
IRQ 0 System Timer IRQ 1 Keyboard IRQ 2 Programmable Interrupt Controller IRQ 3 ACPI IRQ Holder for PCI IRQ Steering; Conexant PCI Modem
Enumerator; NVIDIA GeForce 256; Creative SB Live!
IRQ 4 Communications Port (COM 1) IRQ 5 Available IRQ 6 Diskette Drive Controller IRQ 7 ECP Printer Port (LPT 1) IRQ 8 Real-Time Clock, System CMOS IRQ 9 SCI IRQ used by ACPI bus IRQ 10 ACPI IRQ Holder for PCI IRQ Steering; IEEE 1394 Controller IRQ 11 ACPI IRQ Holder for PCI IRQ Steering; Accton EN1207D Series
PCI Fast Ethernet Adapter IRQ 11 VIA Tech 3038 PCI to USB Universal Host Controller IRQ 12 PS/2 Mouse IRQ 13 Numeric Data Processor IRQ 14 Primary IDE; PCI IDE Controller IRQ 15 Secondary IDE; PCI IDE Controller
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Models and Features
The following tables list Compaq Presario 7800 Series Personal Computer models and model-specific features.
Model
Processor
Speed (MHz)
Memory
(MB)
Hard
Drive
(GB)
CD/DVD CD-RW
Video
Memory
(MB)
Fax/Modem
7800
PIII
500/100
64 15 40x n/a 16 S
7800
PIII
550/100
64 15 8x/10x/12xDVD n/a 16 S
7800
PIII
550/100
64 15 40x n/a 16 S
7800
PIII
600/133
64 17 8x/10x/12xDVD n/a 16 S
7800
PIII
667/133
128 20 8x/10x/12xDVD CD-RW 16 S
CTO
Options
Processor Speed (MHz)
Memory
(MB)
Hard Drive
(GB)
CD/DVD
CD­RW
Video
Memory
(MB)
Fax/Modem
8x 16 or 32
NOTE:
Modem codes: D = 6 Mb Digital DSL/56k V.90 E = 56k V.90 S = 56k V.90 International
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Product Description
CPU Controls and Lights
Description
1
CD or DVD Manual Eject Button
2
CD or DVD Drive Activity Light
3
CD or DVD Load/Eject Button
4
Diskette Drive Eject Button and Drive Activity Light
5
Zip Drive Eject Button and Activity Light*
6
Hard Drive Activity Light
7
Power Button
8
Power Status Light * On select models
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Product Description
Easy Access Internet Keyboard
Easy Access Buttons
Internet Suite Buttons and Keyboard
Lights
Easy Access Buttons
1
Play/Pause
2
Rewind/Previous track
3
Fast forward/Next track
4
Stop
5
Eject
6
Print
7
Launch favorite application
8
Volume down
9
Mute
10
Volume up
11
Sleep
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Internet Suite Buttons
and Keyboard Lights
1
Instant E-Mail
2
Community
3
My Presario
4
Instant Internet
5
Instant Search
6
Online Marketplace
7
Retail Central
8
Number Lock Light
9
Caps Lock Light
10
Scroll Lock Light
Top
Back to Product Description
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Product Description
CPU Back Connectors
Connector Pins
1
Power Connector
2
Scroll Mouse
3
Keyboard
4
Dual USB
5
Serial Port
6
Parallel Port
7
IEEE 1394 Connector
8
Game Port
9
Networking Interface Connector
10
Telephone line to wall outlet
11
Telephone line to telephone
12
Audio Line Out
13
Audio Line In
14
Microphone
15
SVGA Monitor Port
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Parallel
Serial
Universal Serial Bus (USB)
Keyboard
Mouse
VGA Monitor
MIDI/Joystick
Line-in
Speaker/Headphone Out
Microphone
Phone Line to Wall
Phone Line to Phone
DVD-Drive Data Cable
Modem
Connector Pin Assignments
This section contains the connector pin assignments for the Presario 7800 series of personal computers.
Parallel Connector
Pin Signal Pin Signal
1 Strobe* 10 Acknowledge* 2 Data Bit 0 11 Busy 3 Data Bit 1 12 Paper Out 4 Data Bit 2 13 Select 5 Data Bit 3 14 Auto Linefeed* 6 Data Bit 4 15 Error* 7 Data Bit 5 16 Initialize Printer* 8 Data Bit 6 17 Select In* 9 Data Bit 7 18-25 Signal Ground * = Active low
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Serial Connector
Connector Pin Signal
1 2 3 4 5 6 7 8 9
Carrier Detect Receive Data Transmit Data Data Terminal Ready Signal Ground Data Set Ready Ready to Send Clear to Send Ring Indicator
Universal Serial Bus
Connector Pin Signal
1 2 3 4
- Data +Data Ground +5 VDC
Keyboard
Connector Pin Signal
1 2 3 4 5 6
Data Unused Ground +5 VDC Clock Unused
Mouse
Connector Pin Signal
1 2 3 4 5 6
Data Unused Ground +5 VDC Clock Unused
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VGA Monitor
Connector Pin Signal
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Red Analog Green Analog Blue Analog Volume Up Ground Ground Analog Ground Analog Ground Analog +5 VDC Ground Volume Down DDC Data Horizontal Sync Vertical Sync DDC Clock
MIDI/Joystick
Connector Pin Signal
Ext13.gif (3492 bytes)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
+5 VDC Fire A (1) X-Axis (1) GND GND Y-Axis (1) Fire B (1) +5 VDC +5 VDC Fire A (2) X-Axis (2) MIDI Out Y-Axis (2) Fire B (2) MIDI In
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Line In
Connector Connector
Stereo 1/8" Miniphone
Speaker/Headphone Out
Connector Connector
Stereo 1/8" Miniphone
Microphone
Connector Connector
Stereo 1/8" Miniphone
Phone Line to Wall Jack
Connector Pin Signal
ext15r.gif (1764 bytes)
1 2 3 4
Unused Tip Ring Unused
Phone Line to Phone
Connector Pin Signal
ext15r.gif (1764 bytes)
1 2
3
4
Unused
Tip
Ring
Unused
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DVD Drive Data Cable
Pin Signal Pin Signal
1 RESET 21 DMARK 2 GND 22 GND 3 DD7 23 -DIOW 4 DD8 24 GND 5 DD6 25 -DIOR 6 DD9 26 GND 7 DD5 27 IORDY 8 DD10 28 SPSYNC 9 DD4 29 -DMACK 10 DD11 30 GND 11 DD3 31 INTRQ 12 DD12 32 -IOCS16 13 DD2 33 DA0 14 DD13 34 -PDIA6 15 DD1 35 DA0 16 DD14 36 DAZ 17 DD0 37 -CS1FX 18 DD15 38 -C53FX 19 GND 39 -DASP 20 (KEY) 40 GNP
Internal Fax/Modem
Pin Signal Pin Signal
1 Unused 4 Tip 2 Unused 5 Unused 3 Ring 6 Unused
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Troubleshooting
Clearing CMOS
Password Jumper Location
If the power-on password is not known, clearing CMOS will disable the power-on password. To clear CMOS, complete the following steps:
1.
Complete the
preparation for disassembly.
2.
Remove the chassis.
3.
To disable the password, move the jumper (1) at JP1 from 1-2 to 2-3.
4.
Wait for 10 seconds.
5.
Move the jumper (1) at JP1 from 2-3 to 1-
2.
6.
Replace the chassis and perform the appropriate troubleshooting.
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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 drive
Hard drive
CD (or DVD) 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 or visual
message.
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POST (Power-On Self-Test) Error Messages
An error message displays if the POST encounters a problem. This self-test will run automatically each time the system is powered on. The self-test will check all assemblies within the computer and report any errors found.
Click on the desired error code for the probable cause of the error and a recommended course of action.
Diskette Drive A or B Error Failing Bits nnn Fixed Disk Controller Failure
Extended RAM failed at offset nnn Fixed Disk 0 or 1 Failure Incorrect Drive A Type
Invalid NVRAM Media Type Keyboard Controller Error Keyboard Error
Operating System Not Found Parity Check 1 Parity Check 2
Real Time Clock Error System Battery is Dead System BIOS Shadowed
System Cache Error System CMOS Checksum Bad System RAM Failed at Offset, nnn
System Timer Error UMB Upper Limit Segment Address
nnn
Video BIOS Shadowed
Diskette Drive A or B Error
Probable Cause Recommended Action
Drive A: is present, but fails the BIOS POST diskette tests 1. Run Setup.
2. Replace the signal cables.
3. Replace the drive.
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Extended RAM failed at offset nnn
Probable Cause Recommended Action
Extended memory not working or not configured properly 1. Replace the memory
modules.
2. Replace the system board.
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Failing Bits nnn
Probable Cause Recommended Action
nnn is a map of the bits at the RAM address which failed the memory test
1. Run Setup.
2. Replace the system board.
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Fixed Disk 0 or 1 Failure
Probable Cause Recommended Action
Hard drive is not working or configured properly 1. Run Setup.
2. Replace the signal cable.
3. Replace the hard drive.
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Fixed Disk Controller Failure
Probable Cause Recommended Action
Hard drive is not working or configured properly 1. Run Setup.
2. Replace the system board.
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Incorrect Drive A Type
Probable Cause Recommended Action
Type of diskette drive A: not correctly identified 1. Run Setup.
2. Replace the diskette drive.
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Invalid NVRAM Media Type
Probable Cause Recommended Action
Problem with NVRAM (CMOS) access Replace the system board.
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Keyboard Controller Error
Probable Cause Recommended Action
Keyboard, I/O keyboard controller (on system board) or mouse error
1. Replace the keyboard.
2. Replace the mouse.
3. Replace the system board.
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Keyboard Error
Probable Cause Recommended Action
Keyboard, I/O keyboard controller (on system board) or mouse error
1. Replace the keyboard.
2. Replace the mouse.
3. Replace the system board.
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Operating System Not Found
Probable Cause Recommended Action
Operating system cannot be located on either drive A: or C:
Run Setup.
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Parity Check 1
Probable Cause Recommended Action
Parity error found in the system bus 1. Run Setup.
2. Replace the memory modules.
3. Replace the system board.
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Parity Check 2
Probable Cause Recommended Action
Parity error found in the I/O bus 1. Run Setup.
2. Replace the ISA board (modem).
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Real Time Clock Error
Probable Cause Recommended Action
Real-time clock fails BIOS test Replace the system board.
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System Battery is Dead
Probable Cause Recommended Action
RTC battery is dead 1. Replace the RTC battery.
2. Run Setup.
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System BIOS Shadowed
Probable Cause Recommended Action
System BIOS copied to Shadow RAM Replace the system board.
Status message only; no action required.
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System Cache Error
Probable Cause Recommended Action
RAM cache failed the BIOS test Run Setup.
Back to Top
System CMOS Checksum Bad
Probable Cause Recommended Action
CMOS is corrupted or modified incorrectly Run Setup.
Back to Top
System RAM Failed at Offset, nnn
Probable Cause Recommended Action
System RAM failed Replace memory modules.
Back to Top
System Timer Error
Probable Cause Recommended Action
DMA, timers, etc. Replace the system board.
Back to Top
UMB Upper Limit Segment Address nnn
Probable Cause Recommended Action
Displays the address nnn of the upper limit of Upper Memory Blocks, indicating released segments of the BIOS
Run Setup. Status message only; no action required.
Back to Top
Video BIOS Shadowed
Probable Cause Recommended Action
Video BIOS successfully copied to shadow RAM Run Setup.
Status message only; no action required.
Back to Top
Page 18
United States December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home
Removal &
Replacement
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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 & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home
Removal & Replacement
Jumpers & Switches Specifications
Troubleshooting
Troubleshooting Without Diagnostics
If you encounter some minor problem with the computer or 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 DOSSTART.BAT file correct?
Was a non-bootable diskette loaded in the diskette drive at power-up?
Are all CMOS settings correct?
Click on a selection below to identify some quick checks for common problems.
Power Monitor CD Drive USB
Diskette Drive Hard Drive DVD Drive
Resolving Hardware
conflicts
Solving Minor Problems
Problem Possible Solution
Computer will not turn on Ensure that the computer is connected to a working
power source. Computer date and time display is incorrect
The real-time clock (RTC) battery may need to be
replaced. See
Removal and Replacement
Procedures.
Computer powered off automatically 1. The unit may be in Sleep. If the amber light on
the front bezel is on, then the unit is in Sleep.
2. The unit temperature may have been exceeded.
Check the fan for function and blockage.
Top
Back to Troubleshooting
Solving Diskette Drive Problems
Problem Possible Solution
Diskette drive light stays on 1. Diskette may be damaged. In Windows 95 or 98,
run ScanDisk. Click Start =>
Programs=>Accessories=> System
Tools=>Scandisk to check for problems.
2. Diskette is incorrectly inserted. Remove the
diskette and reinsert.
3. Software program may be damaged. Check the
program diskettes.
4. Drive cable is not properly connected. Reconnect
the drive cable. Diskette drive cannot write to a diskette
1. Diskette is not formatted. Format the diskette.
2. Diskette is write-protected. Use another diskette
that is not write-protected, or disable the write
protection on the diskette.
3. Writing to the wrong drive. Check the drive letter
in your path statement.
4. Not enough space is left on the diskette. Use
another diskette. Diskette drive cannot read a diskette 1. Diskette is not formatted. Format the diskette.
2. Using the wrong diskette type for the drive type.
Use a diskette that is compatible with the drive.
3. Reading the wrong drive. Check the drive letter in
your path statement.
4. Diskette drive has been disabled by Setup. Run
Setup and enable the diskette drive.
Top
Back to Troubleshooting
Solving Monitor Problems
Problem Possible Solution
Dim characters 1. The brightness and contrast controls are not set
properly. Adjust the brightness and contrast
controls.
2. Cables are not properly connected. Check that the
video cable is securely connected to the video card
and the monitor.
3. The RGB switch on the back of the monitor is
incorrectly set. Set the RGB switch (and sync
options, if this option is available) to 75 ohms, with
the sync set to "external." Refer to the
documentation included with the monitor. Blank screen 1. Monitor is not turned on and the monitor light is
not on. Turn on the monitor and check that the
monitor light is on.
2. An energy saver feature has been enabled. Press
any key or click the mouse button, and if it is set,
type your password.
3. The brightness needs adjusting. Adjust the
brightness control.
4. System is in Sleep mode. Press the Sleep button
to wake up.
5. The cable connections are not correct. Check the
cable connection from the monitor to the computer
and to the electrical outlet. Garbled characters on the screen are mixed with text
Check the monitor connection. Ensure that the
monitor is capable of supporting the resolution that
the computer is using. If using the DOS
environment, you may need the ANSI.SYS driver.
Add the ANSI.SYS driver to the CONFIG.SYS file by
inserting 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 airflow. Cursor will not move using the arrow keys on the 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. Video colors are wrong The cable or monitor impedance is incorrect.
1. If you are using BNC cables, be sure that the Red,
Green and Blue BNC cables are connected to the
corresponding monitor connectors.
2. Be sure RGB inputs on the monitor are set to 75
ohms. Blurry display or requested resolution cannot be set
If the graphics controller was upgraded, the correct
display drivers may not be loaded. Install the display
drivers on the diskette included in the upgrade kit. The picture is broken up, or it rolls, jitters, or blinks
The monitor connections may be incomplete or the
monitor may be incorrectly adjusted.
1. Be sure the monitor cable is securely connected
to the computer.
2. If another monitor is in close proximity, move
them apart to be sure the electromagnetic field in
each monitor is not interfering with the other.
Top
Back to Troubleshooting
Solving Hard Drive Problems
Problem Possible Solution
Hard drive error occurs Hard disk has bad sectors or has failed. Replace
hard drive. Disk transaction problem The directory structure is bad or there is a problem
with a file.
From the Windows desktop, click on the Start
button. Choose Programs=>Accessories => System
Tools=>Scandisk to check for problems.
If problems exist, run Scandisk and click on the
"Automatically fix errors" checkbox at the bottom to
correct the problems.
If a large number of lost allocation units is found,
click on the Start button. Choose Programs=>
Accessories=>System Tools=>Disk Defragmenter. Drive not found Cable could be loose. Check cable connections. Nonsystem disk message 1. The system is trying to start from a diskette that
is not bootable. Remove the diskette from the
diskette drive.
2. 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.
3. Diskette boot has been disabled in Setup. Run
Setup and enable diskette boot. Hard drive operation seems slow The hard disk files may be fragmented.
From the Windows desktop, click on the Start
button. Choose Programs =>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 button. Choose Programs =>
Accessories=>System Tools=> Disk Defragmenter. Hard drive activity light is not on, or stays on without blinking
The hard disk files may be fragmented.
From the Windows desktop, click on the Start
button. Choose Programs=> 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 button. Choose Programs=>
Accessories => System Tools=>Disk Defragmenter.
Top
Back to Troubleshooting
Solving CD Drive Problems
Problem Possible Solution
Cannot read compact disc 1. CD is not properly seated in the drive. Eject the
CD, press down on the CD firmly to correctly seat it
in the drive, then reload.
2. CD has been loaded upside down. Eject the CD,
turn it over, then reload.
3. CD may be dirty or scratched. Load another CD.
Cannot eject CD CD is not properly seated in the drive. Turn off the
computer, insert a thin metal rod, such as a 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 or driver is not loaded
1. CD drive is not connected properly or not properly
terminated. Open the computer and check to see
that the drive cable is connected properly.
2. Ensure that the correct driver is installed in
CONFIG.SYS.
3. If drive has been changed, make sure the jumper
setting is set for cable select. CD does not work in the DOS mode Proper drivers are not loaded. Restart the system
and make sure the CD drive drivers are loaded.
Top
Back to Troubleshooting
Solving DVD Drive Problems
Problem Possible Solution
Cannot read DVD disk 1. DVD or CD is not properly seated in the drive.
Eject the DVD or CD, press down on the DVD or CD
firmly to correctly seat it in the drive, then reload.
2. DVD or CD disk may be dirty or scratched. Load
another DVD disk. DVD movie does not work in the DOS mode.
DVD will only operate as a CD drive. Make sure that
proper drivers are loaded. Restart the system and
make sure the Optical drive driver is loaded to
enable the DVD drive to operate as a CD drive. Cannot eject DVD disk 1. 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.
Close the application that is using the CD/DVD, then
press eject.
2. The system is in the Sleep mode. Press the Power
button to bring the system back to full power, then
eject the DVD. NOTE: The system will not go into
Sleep mode while playing a DVD movie.
3. DVD disk is not properly seated in the drive. Turn
off the computer, insert a thin metal rod, such as a
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; driver is not loaded
1. DVD drive is not connected properly. Open the
computer and check to see that the drive cable is
connected properly.
2. Ensure that the correct driver is installed in
CONFIG.SYS.
3. If drive has been changed, make sure the jumper
setting is set for cable select. Proper drivers are not loaded. Restart the system and make sure the DVD drive
drivers are loaded. DVD drive slow to start autorun CDs. A DVD drive needs to identify the media descriptor
file from the CD/DVD and may take some time. DVD will not start to play like a CD DVDs are not autoplay like a CD. Go to the Desktop
and click on the DVD player icon. DVD movie does not fill the screen Generally, DVD media are dual-sided. One side
contains the full screen format, and the other has
the wide screen format. Eject the DVD movie and
place the appropriate format facing up.
Top
Back to Troubleshooting
Solving for USB Problems
Problem Possible Solution
USB device does not work with the system.
The USB device and the system should interoperate.
Ensure that the correct driver is installed. Check
product documentation or the vendor's Web site for
updated drivers.
Top
Back to Troubleshooting
Page 20
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home Removal & Replacement Jumpers & Switches Specifications
Illustrated Parts
System Unit
Click on a part to find the spare part number.
Illustrated Parts
System Unit
Mass Storage Cables Boards Fax/Modems Keyboards/Mouse Monitors Return Kits Documentation
System Unit
Description
Spare Part
Number
1
Front bezel assembly 159768-001
2
Cover assembly 148941-001
3
Model logo plate 166183-001
4
Door drive bay assembly
Spared with
front bezel
assembly
5
Button board assembly 141011-001
6
DCIC cover 102370-001
7
Drive bay bezel blank 5.25-in
Spared with
front bezel
assembly
8
Floppy bezel 102369-001
9
Back I/O panel cover TBD
10
Front I/O (DCIC) with cables
174775-001
11
Cage assembly 122929-001
12
Power supply
128017-001
13
Drive bay bezel blank 3.5-in
Spared with
front bezel
assembly
14
Hard drive/Diskette drive/Zip drive cage
Not spared separately
15
Option card retainer cover (not
shown)
174776-001
Page 21
United States December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home Removal & Replacement Jumpers & Switches Specifications
Illustrated Parts
Mass Storage Devices
Illustrated Parts
System Unit
Mass Storage
Cables Boards Fax/Modems Keyboards/Mouse Monitors Return Kits Documentation
3.5-in 1.44 MB Diskette Drive 136436-001
Zip Drive
135568-001
3.5-in Hard Drive
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Page 22
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home Removal & Replacement Jumpers & Switches Specifications
Illustrated Parts
Cables
Illustrated Parts
System Unit Mass Storage
Cables
Boards Fax/Modems Keyboards/Mouse Monitors Return Kits Documentation
Power Cord
Fax/Modem Cable
Modem/Line Filter 334815-111
Diskette Data Cable
327770-001
Audio CD-ROM Cable 149806-001
Cables (not shown) Spare Part Number
Modem Adapter Cable 340398-xxx. Click on the box to find the
Cables
dash number for the modem adapter cable for a specific location.
Page 23
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home Removal & Replacement Jumpers & Switches Specifications
Illustrated Parts
Boards for 7800 Models and 5900T
An example of the type of board used is illustrated. Board may vary slightly from the one shown.
Illustrated Parts
System Unit Mass Storage Cables
Boards
Fax/Modems Keyboards Monitors Return Kits Documentation
Description
Boards
Spare Part
Number
Processor, PIII 500/100
1
PIII 600/133 PIII 667/133
133, 64MB SDIMM
2
133, 128MB SDIMM
153840-001 170394-001 170395-001
170080-001 170081-001
Page 24
United States December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches Specifications
Illustrated Parts
Fax/Modems
Your modem may vary slightly from those shown.
Illustrated Parts
System Unit Mass Storage Cables Boards
Fax/Modems
Keyboards/Mouse Monitors Return Kits Documentation
International Modem 56k V.90 - 166358-002 (S)
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United States December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home Removal & Replacement Jumpers & Switches Specifications
Illustrated Parts
Keyboards/Mouse
Illustrated Parts
System Unit Mass Storage Cables Boards Fax/Modems
Keyboards/Mouse
Monitors Return Kits Documentation
Keyboards/Mouse
Description Spare Part
Numbers
Internet Keyboard
387084-xxx. Click on the box below to determine the dash number for the keyboard for a particular location.
Logitech scroll mouse
334689-002
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Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches Specifications
Illustrated Parts
Monitors
Illustrated Parts
System Unit Mass Storage Cables Boards Fax/Modems Keyboards/Mouse
Monitors
Return Kits Documentation
Compaq MV520 15-inch monitor 105782-001
Compaq MV720 17-inch monitor 105784-001
Compaq MV920 19-inch monitor 105786-001
Page 27
United States December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches Specifications
Illustrated Parts
Return Kit
Illustrated Parts
System Unit Mass Storage Cables Boards Fax/Modems Keyboards/Mouse Monitors
Return Kit
Documentation
Return Kits
Description Spare Part
Number
Return Kit for 7800 series computers - North America
128389-001
Page 28
United States December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches Specifications
Illustrated Parts
Documentation
Illustrated Parts
System Unit Mass Storage Cables Boards Fax/Modems Keyboards/Mouse Monitors Return Kits
Documentation
Documentation and Software
Description
Spare Part
Number
Service Quick Reference Guide (Qty 1)
162212-001
Service Quick Reference Guide (5 pack)
106854-001
Service Quick Reference, Guide Quarterly Subscription (Qty 1)
184960-001
Service Quick Reference Guide, Quarterly Subscription (5 pack)
184961-001
Quick Restore, Presario 7800-Australia
xxxxxx-01x
Quick Restore, Presario 7800­Asia Pacific
xxxxxx-37x
Quick Restore, Presario 7800- Taiwan
xxxxxx-ABx
Quick Restore, Presario 7800-New Zealand
xxxxxx-APx
Top
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United States December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches Specifications
Preparing for Disassembly
To prepare the computer for the removal and replacement procedures, complete the following steps:
1. Remove any diskette, compact disc (CD), or Digital Versatile Disk (DVD) from the
computer.
2. Turn off the computer and any peripheral devices that are connected to the computer.
CAUTION: Hold the power button for approximately four seconds or use the shutdown command in Windows to turn off the system before you disconnect any cables.
3. Disconnect the power cord from the electrical outlet, 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 the position and routing of each cable before removal.
Back to Removal and Replacement
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Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
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Removal &
Replacement
Jumpers & Switches Specifications
Serial Number
Model may vary slightly from the one shown.
The computer serial number should be provided to Compaq whenever requesting information or ordering spare parts. The serial number is located on the back 1 and on the front of the computer, behind the drive cover (not shown).
Back to Removal and Replacement
Page 31
United States December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home Removal & Replacement Jumpers & Switches Specifications
Removal and Replacement
Removal Sequence
Chassis
Mass Storage Devices Button Board Digital Creativity
Imaging Center Option Card Retainer Graphics Board PCI Cards Memory Processor RTC Battery System Board Cables System Board Back I/O Panel Power Supply
Removing the Chassis
1.
Complete the
preparation for disassembly procedures.
2.
Remove five screws from the back of the computer.
3.
Grasp the handle on back of the computer chassis, and pull back to separate from cover.
Replacement
To replace the chassis, reverse the removal procedure.
Back to Removal and Replacement
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United States December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches Specifications
Removal and Replacement
Removal Sequence
Chassis
Mass Storage Devices
Button Board Digital Creativity Imaging Center Option Card Retainer Graphics Board PCI Cards Memory Processor RTC Battery System Board Cables System Board Back I/O Panel Power Supply
Mass Storage Devices Index
1
Optical Drives*
2
Zip Drive
3
Diskette Drive
4
Hard Drive
* Optical Drives refer to the CD, CD-ROM, CD-RW, and DVD.
Page 33
United States December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home Removal & Replacement Jumpers & Switches Specifications
Removal and Replacement
Mass Storage Devices
Optical Drive
Zip Drive Diskette Drive Hard Drive Mass Storage Devices
Index
Removing the Optical Drive
1.
Complete
preparation for disassembly procedures.
2.
Remove the chassis.
3.
Disconnect audio, data, and power cables.
Next Step
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United States December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches Specifications
Removal and Replacement
Mass Storage Devices
Optical Drive
Zip Drive
Diskette Drive Hard Drive Mass Storage Devices
Index
Removing the Zip Drive
1.
Complete the
preparation for disassembly procedures.
2.
Remove the chassis.
3.
Disconnect the data and power cables.
Next Step
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United States December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches Specifications
Removal and Replacement
Mass Storage Devices
Optical Drive
Zip Drive
Diskette Drive Hard Drive Mass Storage Devices
Index
Removing the Zip Drive, continued
4.
Remove the two screws from the right side and the two screws from the left side of the Zip Drive.
5.
Grasp the Zip Drive and remove from the drive bay.
Replacement
To replace Zip Drive, reverse the removal procedure.
Return to Removal and Replacement
Page 36
United States December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home Removal & Replacement Jumpers & Switches Specifications
Removal and Replacement
Mass Storage Devices
Optical Drive
Zip Drive Diskette Drive Hard Drive
Mass Storage Devices Index
Removing the Optical Drive, continued
4.
Remove two screws from the right side and two screws from the left side of the Optical Drive.
5.
Remove the Optical Drive from the drive bay.
Replacement
To replace the Optical Drive, reverse the removal procedure.
Return to Removal and Replacement
Page 37
United States December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches Specifications
Removal and Replacement
Mass Storage Devices
Optical Drive Zip Drive
Diskette Drive
Hard Drive Mass Storage Devices
Index
Removing the Diskette Drive
1.
Complete
preparation for disassembly procedures.
2.
Remove chassis.
3.
Disconnect the power and data cables.
Next Step
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Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches Specifications
Removal and Replacement
Mass Storage Devices
Optical Drive Zip Drive
Diskette Drive
Hard Drive Mass Storage Devices
Index
Removing the Diskette Drive, continued
4.
Remove the two screws from the right side and the two screws from the left side of the diskette drive bay.
5.
Pull the diskette drive out of the drive bay.
Replacement
To replace the diskette drive, reverse the removal procedure.
Return to Removal and Replacement
Page 39
United States December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home Removal & Replacement Jumpers & Switches Specifications
Removal and Replacement
Hard Drives
5.25-Inch drive
3.5-Inch drive
The Compaq Presario 7800 Series Computers may be equipped with 5.25-Inch or 3.5-Inch form factor hard drives. Refer to the disassembly instructions for the model you are servicing.
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United States December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches Specifications
Removal and Replacement
Mass Storage Devices
Optical Drive
Zip Drive Diskette
Drive
Hard Drive
Mass Storage Devices Index
Removing the 5.25­Inch Hard Drive
1.
Complete the
preparation for disassembly procedures.
2.
Remove the chassis.
3.
Disconnect the data and power cables.
Next Step
Page 41
United States December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches Specifications
Removal and Replacement
Mass
Storage Devices
Optical Drive
Zip Drive
Diskette Drive
Hard Drive
Mass Storage Devices Index
Removing the
5.25-Inch Hard Drive, continued
4.
Remove the two screws from the chassis and the two screws from the Hard Drive supports.
5.
Slide the Hard Drive forward and lift up from the chassis.
Replacement
To replace the Hard Drive, reverse the removal procedure.
Page 42
United States December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home Removal & Replacement Jumpers & Switches Specifications
Removal and Replacement
Mass Storage Devices
Optical Drive Zip Drive Diskette Drive
Hard Drive
Mass Storage Devices Index
Removing the 3.5­Inch Hard Drive
1.
Complete the
preparation for disassembly procedures.
2.
Remove the chassis.
3.
Disconnect the data and power cables.
Next Step
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Page 43
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches Specifications
Removal and Replacement
Mass Storage Devices
Optical Drive
Zip Drive
Diskette Drive
Hard Drive
Mass Storage Devices Index
Removing the 3.5-Inch Hard Drive, continued
4.
Remove the two screws from the right side and the two screws from the left side of the Hard Drive supports.
5.
Slide Hard Drive inward to remove from chassis.
Replacement
To replace the Hard Drive, reverse the removal procedure.
Return to Removal and Replacement
Page 44
United States December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches Specifications
Removal and Replacement
Removal
Sequence
Chassis Mass Storage Devices
Button Board
Digital Creativity Imaging Center
Option Card Retainer Graphics Board PCI Cards Memory Processor RTC Battery System Board Cables System Board Back I/O Panel Power Supply
System board may vary depending on model.
Removing the Button Board
1.
Complete the
preparation for disassembly procedures.
2.
Remove the chassis.
3.
Disconnect button board power/data cable from the system board (J10).
Next Step
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Page 45
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches Specifications
Removal and Replacement
Removal
Sequence
Chassis Mass Storage Devices
Button Board
Digital Creativity Imaging Center
Option Card Retainer Graphics Board PCI Cards Memory Processor RTC Battery System Board Cables System Board Parallel Port Back I/O Panel Power Supply
Removing the Button Board, continued
4.
Remove the two screws from button board assembly and remove assembly from back of the front bezel.
Replacement
To replace the button board, reverse the removal procedure.
NOTE: Reconnect the power/data cable with the red wire connected to pin 1. Last two pins on left should be exposed. (See previous page for graphic).
Return to Removal and Replacement
Page 46
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches Specifications
Removal and Replacement
Removal
Sequence
Chassis Mass Storage Devices Button Board
Digital Creativity Imaging Center
Option Card Retainer Graphics Board PCI Cards Memory Processor RTC Battery System Board Cables System Board Back I/O Panel Power Supply
System board may vary depending on model.
Removing the Digital Creativity Imaging Center (DCIC)
1.
Complete the
preparation for disassembly procedures.
2.
Remove the chassis.
3.
Disconnect the IEEE 1394 wire cable (JP3) and USB ribbon cable (JP4) from the system board.
Next Step
Replacement
To replace the DCIC cables, reverse the replacement procedure.
Page 47
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches Specifications
Removal and Replacement
Removal
Sequence
Chassis Mass Storage Devices Button Board Digital Creativity
Imaging Center
Option Card Retainer
Graphics Board PCI Cards Memory Processor RTC Battery System Board Cables System Board Back I/O Panel Power Supply
Removing the Option Card Retainer
1.
Complete the
preparation for disassembly procedures.
2.
Remove the chassis.
3.
Remove the two screws from the Option Card Retainer and remove retainer from chassis.
Replacement
To replace the Option Card Retainer, reverse the removal procedure.
Back to Removal and Replacement
Page 48
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches Specifications
Removal and Replacement
Removal
Sequence
Chassis Mass Storage Devices Button Board Digital Creativity
Imaging Center Option Card Retainer
Graphics Board
PCI Cards Memory Processor RTC Battery System Board Cables System Board Back I/O Panel Power Supply
Removing the Graphics Board
1.
Complete the
preparation for disassembly procedures.
2.
Remove the chassis.
3.
Remove the Option Card Retainer.
4.
Pull the graphics board and bracket out and to the left to remove from the chassis.
Replacement
To replace graphics board, reverse the removal procedure.
Back to Removal and Replacement
Page 49
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home
Removal &
Replacement
Removal and Replacement
Removal
Sequence
Chassis Mass Storage Devices Button Board
Digital Creativity Imaging Center
Option Card Retainer
Jumpers & Switches Specifications
Removing a PCI Card
1.
Complete the
preparation for disassembly procedures.
2.
Remove the chassis.
Graphics Board
PCI Cards
Memory Processor RTC Battery System Board Cables System Board Back I/O Panel Power Supply
Illustration shows Fax/Modem card.
All PCI Cards (Fax/Modem, Audio, NIC, and
NOTE:
Location of PCI Cards are as follows:
Audio card in PCI slot 2
HPN card in PCI slot 3
NIC card in PCI slot 4
Fax/Modem card in PCI slot 5
Home PNA) have the same removal procedures.
3.
Remove the Option Card Retainer.
4.
Pull the PCI Card out and to the left to remove from the chassis.
Replacement
To replace the PCI Card, reverse the replacement procedure.
Back to Removal and Replacement
Page 50
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches Specifications
Removal and Replacement
Removal
Sequence
Chassis Mass Storage Devices Button Board Digital Creativity
Imaging Center Option Card Retainer Graphics Board PCI Cards
Memory
Processor RTC Battery System Board Cables System Board Back I/O Panel Power Supply
Removing the Memory Module
1.
Complete the
preparation for disassembly procedure.
2.
Remove the chassis.
3.
Press outward on the release latches found on both ends of the Dual Inline Memory Module (DIMM).
4.
Detach memory module from slot.
Replacement
To replace memory module, reverse the removal procedure.
Back to Removal and Replacement
Page 51
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches Specifications
Removal and Replacement
Processor for 7800 Models and 5900T
Removal
Sequence
Chassis Mass Storage Devices Button Board Digital Creativity
Imaging Center Option Card Retainer Graphics Board PCI Cards Memory
Processor
RTC Battery System Board Cables System Board Back I/O Panel Power Supply
Processor may vary from the one shown.
Removing the Processor
1.
Complete the
preparation for disassembly procedures.
2.
Remove the chassis.
CAUTION: The processor may still be very hot if the computer has not been running recently.
3.
Disconnect heat sink fan from the system board.
4.
Unlatch the heat sink clip from the socket.
5.
Remove the heat sink. (NOTE: If the heat sink is bonded with processor, twist to remove the heat sink.)
6.
Lift up the ZIF socket handle (1), remove the processor from the socket (2).
Replacement
To reinstall the processor, rub a thermal transfer crayon on the bottom of the heat sink, then reverse the steps above.
NOTE: The thermal transfer crayon replaces the thermal pad.
Back to Removal and Replacement
Page 52
United States December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home Removal & Replacement Jumpers & Switches Specifications
Removal and Replacement
Removal
Sequence
Chassis Mass Storage Devices Button Board Digital Creativity
Imaging Center Option Card Retainer Graphics Board PCI Cards Memory Processor
RTC Battery
System Board Cables System Board Back I/O Panel Power Supply
Removing the RTC Battery
1.
Perform the
preparation
for disassembly procedure.
2.
Remove the chassis.
3.
Push out the socket lever
1 and slide the RTC
battery out of the socket
2.
Replacement
To replace the RTC battery, reverse the removal procedure.
WARNING: The clock/CMOS lithium battery may explode if mistreated. Do not abuse. Use only replacement batteries supplied by Compaq Computer Corporation.
Back to Removal and Replacement
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Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches Specifications
Removal and Replacement
Processor for 7800 Models
Removal
Sequence
Chassis Mass Storage Devices Button Board Digital Creativity
Imaging Center Option Card Retainer Graphics Board PCI Cards Memory Processor RTC Battery
System Board Cables
System Board Back I/O Panel Power Supply
Removing the System Board Cables
1.
Parallel port cable connector, J21 system board connector
2.
Active heatsink cable, J15 system board connector
3.
Power supply cable, J9 system board connector
4.
1394 cable, JP3 system board connector.
5.
USB cable, JP4 system board connector.
6.
Not used, J11 system board connector.
7.
Diskette drive data cable, J14 system board connectors.
8.
CD/DVD data cable, J13 system board connector.
9.
Hard drive data cable, J12 system board connector.
10. Button board data cable, J10 system board connector.
Replacement
To replace the System Board Cables, reverse the removal procedure.
Back to Removal and Replacement
Page 54
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home Removal & Replacement Jumpers & Switches Specifications
Removal and Replacement
Removal
Sequence
Chassis Mass Storage
Devices Button Board Digital
Creativity Imaging Center
Option Card Retainer
Graphics Board PCI Cards Memory Processor RTC Battery System Board
Cables
System Board
Back I/O Panel Power Supply
System board may vary from the one shown.
Removing the System Board
1.
Complete the
preparation for disassembly procedures.
2.
Remove the chassis.
3.
Remove the Graphics Board.
4.
Remove the Fax/Modem.
5.
Remove Networking Interface Card (on select
models only).
6.
Remove the Audio Card.
7.
Remove the Memory.
8.
Remove the Processor.
9.
Disconnect the System Board Cables.
NOTE:
Be sure to remove components such as DIMMs and processor before replacing the system board.
10.
Remove the nine screws from the system board.
11.
Slide system board toward drive bay and lift from the computer.
Replacement
To replace the system board, reverse the removal procedure.
Back to Removal and Replacement
Page 55
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home Removal & Replacement Jumpers & Switches Specifications
Removal and Replacement
Back I/O Panel may vary depending on model.
United States December 31, 2002
Removal
Sequence
Chassis Mass Storage Devices Button Board Digital Creativity
Imaging Center Option Card Retainer Graphics Board PCI Cards Memory Processor RTC Battery System Board Cables System Board
Back I/O Panel
Power Supply
Removing the Back I/O Panel
1.
Complete the
preparation for disassembly procedures.
2.
Remove the chassis.
3.
Remove the Graphics Board.
4.
Remove the Fax/Modem.
5.
Remove the Networking Interface Card (on select models
only).
6.
Remove the Audio Card.
7.
Remove the Memory.
8.
Remove the Processor.
9.
Disconnect System Board Cables.
10.
Remove the System Board.
11.
Push the back I/O Panel into the chassis from the back of the chassis and remove.
Back to Removal and Replacement
Replacement
To replace the Back I/O Panel, reverse the removal procedure.
Page 56
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches Specifications
Removal and Replacement
Removal
Sequence
Chassis Mass Storage Devices Button Board Digital Creativity
Imaging Center Option Card Retainer Graphics Board PCI Cards Memory Processor RTC Battery System Board Cables System Board Back I/O Panel
Power Supply
Removing the Power Supply
1.
Complete the
preparation for disassembly procedures.
2.
Remove the chassis.
3.
Remove
5.25-Inch or 3.5-Inch Hard Drive.
4.
Disconnect System Board Cables.
5.
Disconnect power supply cables from CD/DVD, Zip drive, Diskette and Hard Drive.
6.
Remove Graphics Board.
7.
Remove the Fax/Modem.
8.
Remove Networking Interface Card (on
select models only).
9.
Remove the Audio Card.
10.
Remove the Memory.
11.
Remove the Processor.
12.
Remove the System Board.
13.
Remove the four screws from the back of the unit and one screw from the tab.
14.
Slide the power supply toward front of unit and down to remove from chassis.
Replacement
To replace the power supply, reverse the removal procedure.
Back to Removal and Replacement
Page 57
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home
Removal &
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Jumpers & Switches Specifications
Presario 7800 and 5900T Models with Pentium III System Board
Jumper & Switch Information
Number Function Description
Reference
Designator
1
Secondary IDE Drive
40-pin J13
2
Diskette Drive 34-pin J14
3
Primary IDE Drive 40-pin J12
4
Not used
5
Secondary fan connector
J20
6
Button Board 20-pin J10
7
CMOS 3-pin JP1
8
Battery Socket
Battery holder
BT1
9-13
PCI Slots
32-bit PCI connector
PCI 1 to 5
14
AGP Slot Connector AGP1
15
Slot 1 321-pin PGA J18
16
Front side bus
four, 2-pin jumpers
JP5-7*
17
Heat sink fan connector
3-pin J15
18-20
DIMM Sockets
168-pin DIMM
DIMM 1 to 3
21
IEEE 1394 10-pin JP3
22
Front I/O panel 10-pin JP4
23
Single front I/O panel
30-pin J11**
24
Mouse
Miniature 6­pin
J1
25
Keyboard
Miniature 6­pin
J1
26
Back USB Dual 4-pin J2
27
Serial Port DSUB 9-pin J4
28
Parallel Port
DSUB 25­pin
J21
29
IEEE 1394 Connector
6-pin J7
Fan 3-pin Power Supply 20-pin J9 Clock Multiplier 3, 2-pin JP2
* JP7 always set to the ON position. JP5, JP6, and JP8 always set to the OFF position.
** Single front I/O panel and USB and IEEE1394 connectors are not used concurrently.
Jumper Settings
Clearing CMOS
Frequency Selection (JP2)
Clearing CMOS JP1
CMOS Normal
CMOS Clear
pins 1-2 pins 2-3
Top
Frequency Selection (JP2)
Multiplier
Pin (1-2)Pin (3-4)Pin (5-6)Pin (7-8)FSB 66
MHz
FSB 100
MHz
FSB 133 MHz
2 ON ON ON ON 133 200 266 3 ON OFF ON ON 200 300 400 4 OFF ON ON ON 266 400 533
5 OFF OFF ON ON 333 500 667 5/2 ON ON OFF ON 166 250 333 7/2 ON OFF OFF ON 233 350 466 9/2 OFF ON OFF ON 300 450 600
11/2 OFF OFF OFF ON 366 550 733
6 ON ON ON OFF 400 600 800
7 ON OFF ON OFF 466 700 933
8 OFF ON ON OFF 533 800 1066
Reserved OFF OFF OFF OFF *** *** ***
13/2 ON ON OFF OFF 433 650 866 15/2 ON OFF OFF OFF 500 750 1000
3/2 OFF ON OFF OFF 100 150 200
2 OFF OFF OFF OFF 133 200 266
Top
Page 58
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
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Removal &
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3.5-Inch Hard Drive
Back to Jumpers
5.25-Inch Hard Drive
Back to Jumpers
Page 59
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
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Removal &
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Jumpers & Switches Specifications
Digital Versatile Disk Drive
Settings may vary depending on vendor.
Back to Jumpers
CD Drive
Settings may vary depending on vendor.
Back to Jumpers
Page 60
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Presario 7800 Series and 5900T Personal Computers
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Specifications
Compaq Presario 7800 Series Personal Computer specifications are listed in the following tables. Select the specification you are interested in from the navigation bar.
Specifications
System Specifications
Video Memory System Interrupts System I/O System Memory System DMA Power Supply Diskette Drive DVD Drive IDE Hard Drives Mouse Fax/Modem CD-RW Drive
System Memory
Low Address High Address System Function
00000000 0009FFFF Base Memory 000A0000 000CFFFF NVIDIA GeForce 256 000E0000 000FFFFF Base Memory 00100000 080FFFFF Base Memory 08100000 0810FFFF Conexant PCI Modem Enumerator 08110000 081100FF Accton EN1207D Series PCI Fast Ethernet
Adapter 09000000 09FFFFFF NVIDIA GeForce 256 09000000 0A0FFFFF VIA Tech 8598 CPU to AGP Controller 0A000000 0A00FFFF NVIDIA GeForce 256 10000000 17FFFFFF VIA Tech 8598 CPU to AGP Controller 10000000 17FFFFFF NVIDIA GeForce 256 08000000 0807FFFF Standard Direct Video Memory 08080000 080FFFFF Optional Direct Video Memory 08100000 7FFFFFFF unused 80000000 80FFFFFF Memory mapped I/O devices 81000000 FDFDFFFF unused/System ROM aliases FDFE0000 FDFFFFFF System ROM (alias) FE000000 FFFDFFFF unused FFFE0000 FFFFFFFF System BIOS ROM
Top
System DMA
Default DMA Function
DMA0 ECP Printer Port (LPT1) DMA1 Creative SB16 Emulation DMA2 Standard Floppy Disk Controller DMA3 Available DMA4 Direct Memory Access Controller DMA5 Creative SB16 Emulation DMA6 Available DMA7 Available
Top
Power Supply
U. S. Outside U. S.
Input Specifications
Voltage Switch Setting 115 V 230 V Nominal Line Voltage 115 VAC 230 VAC Range Input Line 90 to 132 VAC 180 to 264 VAC Frequency Range 47 to 63 Hz 47 to 63 Hz Power Factor 0.55 0.55 Input Power 310 Watts 310 Watts Input Current 6 at 90 VAC 3 at 180 VAC Inrush Current 65 A at 115 VAC
(cold start)
65 A at 230 VAC (cold start)
Holdup Time 16 ms from zero
crossing at 120 VAC
16 ms from zero crossing at 240 VAC
Steady State 200 Watts 200 Watts
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 1.4 A on + 5.0 V
output; 0.07 A on 12 V output
1.4 A on + 5.0 V output; 0.07 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; TUV/VDE EN 60 950 (VDE0805/11.91); EMKO-TSE (74­SEC) 207/94
Input Transient Susceptibility
Common and Differential Mode (superimposed on AC line)
2500 V, 1 us, damped sinusoid 600 V, 10 us pulse
Differential Mode 20% step change in AC input voltage
Top
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-to-Track 3 Average 94 Settling Time 15 Latency Average 100
Top
CD/DVD 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, DVD­18 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
Diameter
12 cm, 8 cm
Thickness
1.2 mm
Track Pitch
0.74 µm (DVD) 1.6 µm (CD-ROM)
Laser
Beam Divergence Output Power Type Wave Length
53.5 degrees ± 1.5 degrees 5 mW Semiconductor laser GaAIAs 650 nm ± 25 nm (DVD) 795 nm ± 25 nm (CD)
Access Time (Typical)
Random Full Stroke
DVD:
< 180 ms < 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 (single, CD-ROM
mode) 2100-4800 KB/sec (32× CAV CD­ROM mode) 4455-10800 KB/sec (8× CAV DVD mode)
Interface Cable Length (Max)
18 in
Startup Time
< 10 sec
Stop Time
< 3 sec
Top
Page 61
United States December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home Removal & Replacement Jumpers & Switches Specifications
Specifications
Compaq Presario 7800 Series Personal Computer specifications are listed in the following tables. Select the specification you are interested in from the navigation bar.
Specifications
System Specifications Video Memory System Interrupts System I/O System Memory System DMA Power Supply Diskette Drive DVD Drive IDE Hard Drives Mouse Fax/Modem CD-RW Drive
IDE Hard Drives
10 GB 10 GB 15 GB 20 GB 30 GB 40 GB
Compaq Spare Part Number
168028­001
168029­001
170389-001 168031-001 168628-
001
173342-001
Formatted Capacity
Physical (MB) Logical (MB)
10020 10020
10005 15020 20020
20020
30020 30020
40020 40020
Transfer Rate
Head (Mbits/sec) Interface (Mbytes/sec)
148.8-
241.9 66
66 66
148.8-241.966113.9-
198.7 66
66
Typical Seek Time (including settling)
Single Track (mS) Average (mS) Full Stroke (mS)
1.5
11.0
18.0
1.0 <0.9 <20
1 <0.9 <20
1.5
11.0
18.0
1.5
9.0
18.0
1.0 <9.0 <20.0
Disk Rotational Speed (RPM)
5400 7200 5400 5400 5400 7200
Cylinders
Physical Logical
16383 16383
19386 16383
19571 16383
15957 16383
33637 16383
19386 16383
Data Heads
Physical Logical
3162161166
16
4168
16
Sectors per Track
Physical Logical
307-51263325-56063312-57663307-51263309-53963325-560
63
Top
Mouse
U. S. Metric
Dimensions
Height Length Width
1.48 in
4.76 in
2.44 in
37.5 mm
120.8 mm
62.0 mm
Weight
6.1 oz 131 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 10 kV; No hard errors through 15 kV; specific performance depends on host system
Top
Fax/Modem
Conexant HCF V.90 56K Data Fax PCI Modem
Conexant HCF V.90 56K Data Fax PCI Modem (includes an
International DAA)
Conexant DSL
Maximum Data Speed (kbps)
56* 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
V.90, K56Flex, V.34, V.32terbo,V.32bis, V.32, V.22bis, V.22, V.23, V.21, Bell 212A, Bell 103
Error Correction
V.42bis,V.42, LAPM, and MNP 2-5
V.42, LAPM, and MNP 2-4
V.42 and MNP2-4
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
V.17 (14.4 kbps transmission speed) V.29, V.27ter, V.21 Channel 2, Group III, 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.
Top
CD-RW Drive
Dimensions U. S. Metric
Width Height Depth
Weight Applicable Read-Only Disc
CD-ROM Mode 1 CD-ROM XA Mode 2, Form 1 and Form 2 CD Digital Audio CD Extra CD-I
CD-I Ready
Mode 2, Form 1 and Form 2
Photo CD Single and Multi Session Video CD
Block Size (Read-Only Disc Parameters)
CD-R Mode 1 2048, 2352 bytes CD-R Mode 2, Form 1 2048, 2328, 2336, 2340, and 2352
bytes CD-R Mode 2, Form 2 2328, 2336, 2340, and 2352 bytes CD-DA 2352 and 2368 bytes
Applicable Writeable Disc
CD-ROM Mode 1 CD-ROM XA Mode 2, Form 1 and Form 2 CD Digital Audio CD-I Mode 2, Form 1 and Form 2 Video CD CD-Text
Block Size (Writeable Disc Parameters)
CD-RW Mode 1 2048 bytes CD-RW Mode 2, Form 1 2048 and 2352 bytes CD-RW Mode 2, Form 2 2352 bytes CD-DA 2352 bytes
Center Hole
15 mm diameter
Diameter
12 cm, 8 cm
Thickness
1.2 mm
Track Pitch
1.6 µm
Laser
Access Time
Random Full Stroke
150 ms (typical)
350 ms (typical)
Audio Output Level
Line Out Headphone
1.0 V (RMS) at 47 kW
0.7 V (RMS) at 32 W
Cache Buffer
1 Mbyte (minimum) Sustained Data Transfer Rate
300 KB/s (2X) CD-ROM, CD-
R, CD-RW Read, CD-R, CD­RW Write
600 KB/s (4X) CD-ROM, CD-
R, CD-RW Read, CD-R Write
Variable 1500 to 3600 KB/s
(10X to 24X) CD-ROM, CD-R Read
Interface Cable Length (Max)
18 in
Startup Time
< 7 sec (single, typical)
< 30 sec (multisession, typical)
Stop Time
< 4 sec
privacy and legal statement
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Presario 7800 Series Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
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Removal &
Replacement
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Specifications
Compaq Presario 7800 Series Personal Computer specifications are listed in the following tables. Select the specification you are interested in from the navigation bar.
Specifications
System Specifications
Video Memory System Interrupts System I/O System Memory System DMA Power Supply Diskette Drive DVD Drive IDE Hard Drives Mouse Fax/Modem CD-RW Drive
System I/O
Low I/O Address
High I/O
Address Function
0000 000F DMA Controller #1 0010 001F DMA Controller Aliases 0020
Interrupt Controller #1 Control Register
0021
Interrupt Controller #1 Mask Register
0022 003D Interrupt Controller Aliases 0040 0043 Counter/Timer 0044 004F 0050 0053 Counter/Timer Aliases 0053 005F 0060
Keyboard Controller Data Register
0061
Port B: SERR/IOCHK NMI, Speaker, Refresh
0062 0063 0064
Keyboard Controller Command/Status
Register
Top
0065 006F 0070
NMI Mask Register (Bit 7)
0070
RTC/Configuration Memory Index Port (Bit
6:0)
0071
RTC/Configuration Memory Data Port
0072
RTC Extended Index
0073
RTC Extended Data
0074 007F 0080 008F DMA Page Registers 0090 0091 Alias of DMA page registers if SOUTH
BRIDGE.4C.7=0
0092
Port 92 (fast reset and A20 gate)
0093 009F Alias of DMA page registers if SOUTH
BRIDGE.4C.7=0
00A0
Interrupt Controller #2 Control Register
00A1
Interrupt Controller #2 Mask Register
00A2 00B1 00B4 00BF 00C0 00DF DMA Controller #2 00E0
ESS Index Register
00E1
ESS Data Register
00E2 00E3 DDC2 Registers 00E4 00E5 Master I2C Interface 00E6
TV/MPEG Configuration Register
00E7 00E9 00EA
Ultra I/O Index Register
00EB
Ultra I/O Data Register
00EC 00EF Modem configuration 00F0 00F1 Coprocessor Busy Clear/Reset 00F2 00F8 00F9
Lock Configuration Register (Dummy Write)
00FA 00FB
Unlock Configuration Register (Dummy Write)
00FD 00FF 0100 0101 0102
Video: POS. 102 register
0103 012F 0132 016F 0170 0177 Secondary IDE Controller 0178 01EF 01F0 01F7 Primary IDE Controller 01F8 0200 0201 0202 021F 0220 022F 0230 025F 0260 0263 0264 0277 0278 027F Reserved-Parallel Port 0280 02E7 02E8 02EF Reserved-Serial Port (COM4) 02F0 02F7 02F8 02FF (COM2) 0330 0331 0332 036F 0370 0377 Reserved-Floppy Drive Controller 2 0378 037F Parallel Port 0380 0387 0388 038B 038C 03B3 03B4 03B5 Video: Monochrome 03B6 03B9 03BA
Video: Monochrome
03BB 03BC 03BF Reserved-Parallel Port 03C0 03CF Video: VGA Registers 03D0 03D3 03D4 03D5 Video: Color 03D6 03D9
03DA
Video: Color
03DB 03E7
03E8 03EF Reserved-Serial Port (COM3) 03F0 03F7 Floppy Disk Controller (Primary) 03F6 03F7 IDE Interface (Fixed Disk and CD-ROM) 03F8 03FF Serial Port (COM1) 0400 04EF 04D0
Interrupt Controller #1 Edge/Level Control
04D1
Interrupt Controller #2 Edge/Level Control
04D2 0677 0678 067A Parallel Port ECP Mode 0778 077A Parallel Port ECP Mode 0CF8
PCI Configuration Index (32-bit I/O only) 0CFC
PCI Configuration Data 46E8
Video: Adapter Sleep
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Digital Creativity Imaging Center
Description
1
USB (Universal Serial Bus) connector
2
IEEE 1394 connector
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Power Management Features
Compaq Presario 7800 Series Personal Computers use ACPI (Advanced Configuration and Power Interface) for system power management. ACPI is an open industry specification that provides reliable power management through improved hardware and operating system coordination.
The following is a list of the power management features:
Power Status Lights. You can quickly tell the sleep condition of the system by glancing at
the Power Status Lights on the unit or keyboard.
Automatic Sleep. In Windows 98, there are different Power Schemes under which the
system goes into Sleep mode automatically when it times out. The optional settings for Windows 98 are Home/Office Desk, Portable/Laptop, and Always On. The system supports different levels of power management for varying patterns of computer usage.
Default and Adjustable timeout settings. The default setting for Sleep timeout is 30
minutes. The Sleep timeout value can be set in the Control Panel by clicking the Power Management icon. At the Properties screen, click System Standby, Turn off Monitor, and Turn off Hard Disk to set the length of time before the system goes to sleep.
Manual Sleep. To manually put your computer into sleep mode in the Windows 98 desktop,
press the Sleep button (on the keyboard). The power status light on the CPU will light to show that Sleep mode is activated.
Other manual standby options. Another way to put your computer into sleep mode
manually under Windows 98 is to select Start, then Shutdown. Select Standby from the list of choices to put the system into Sleep mode. The system can then be turned off or left in Sleep. When the Sleep button is pressed, the system returns to the previous Windows 98 Desktop state.
Wake-up events. Events that bring a system back to the working state include:
Pressing the Sleep button on the keyboard
Pressing the CPU Power button
Answering a call from Fax/Modem
Synchronized software and hardware volume control buttons.
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States of Power Management
Power management can be defined by three distinct power states in which the computer operates: On, Off, and Sleep. The following table describes the power states and lists the power consumption of each state:
Power Management States
Energy State Description Power Consumption
On Power is available to the system. The
AC cable is connected, and the power status light is green.
90 Watts avg., 110 Watts max
Off Power is not available to the system
and the AC cable is disconnected. The power status light is not lit.
0 Watts
Soft Off Power is available to the system, the
AC cable is connected, and the power status light is off.
1-2 Watts
Sleep Power is available to the system, the
AC cable is connected, and the computer is in a low power/standby mode. The power status light is amber.
27 Watts
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Power Cord Set Requirements
The voltage select switch feature on the computer allows it to operate from any line voltage between 120 and 240 volts AC.
The power cord set (flexible cord and wall plug) supplied with the computer meets the
general
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 the computer is used. For more information on power cord set requirements, contact a 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. To mate with the appliance inlet on the Switch Box, the appliance coupler must meet the mechanical configuration of an EN 60 320/IEC 320 Standard Sheet C13 connector.
Country-Specific Requirements
Power Cord Set Requirements by Country
Country Accredited
Agency
Applicable Note Numbers
Australia EANSW 1 Austria OVE 1 Belgium CEBC 1 Canada CSA 2 Denmark DEMKO 1 Finland SETI 1 France UTE 1 Germany VDE 1 Italy IMQ 1 Japan JIS 3 Norway NEMKO 1 Sweden SEMKO 1 Switzerland SEV 1 United Kingdom BSI 1 United States UL 2
NOTES:
1. The flexible cord must be <HAR> Type HO3VV-F, 3-conductor, 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.
2. 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 6-15P (15A, 250V) configuration.
3. 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, 3­conductor, 0.75mm2 conductor size. The wall plug must be a two-pole type with a Japanese Industrial Standard C8303 (15A, 125V) configuration.
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United States January 2, 2003
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home Removal & Replacement Jumpers & Switches Specifications
Removal and Replacement
Service Considerations - Optical Drive Cable Positions
Cable Positions
Optical Drive
Digital Creativity Imaging Center
3.5-Inch Hard Drive
5.25-Inch Hard Drive Zip Drive Diskette Drive Service Considerations
Index Page
db.jpg (73195 bytes)
System board may vary from the one shown.
Connect CD/DVD data cable to system board connector (J7 or IDE2).
If connecting CD/DVD and CD­RW, use cable drive 0 to CD/DVD and drive 1 to CD­RW.
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Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home Removal & Replacement Jumpers & Switches Specifications
Removal and Replacement
Service Considerations - Digital Creativity Imaging Center Cable Positions
Cable Positions
Optical Drive
Digital Creativity Imaging Center
3.5-Inch Hard Drive
5.25-Inch Hard Drive Zip Drive Diskette Drive Service Considerations
Index Page
dg.jpg (59140 bytes)
System board and cable size may vary from the one shown.
Connect the Digital Creativity Imaging Center (or front I/O panel) cable to system board connector (J4 or USB2).
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Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home Removal & Replacement Jumpers & Switches Specifications
Removal and Replacement
Service Considerations - 3.5-Inch Hard Drive Cable Positions
Cable Positions
Optical Drive Digital Creativity
Imaging Center
3.5-Inch Hard Drive
5.25-Inch Hard Drive Zip Drive Diskette Drive Service Considerations
Index Page
dc.jpg (76079 bytes)
System board may vary from the one shown.
WARNING: AC power must be disconnected.
Connect the hard drive data cable to system board connector (J6 or IDE1).
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Maintenance & Service Guide
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Service Considerations - 5.25-Inch Hard Drive Cable Positions
Cable Positions
Optical Drive Digital Creativity
Imaging Center
3.5-Inch Hard Drive
5.25-Inch Hard Drive
Zip Drive Diskette Drive Service Considerations
Index Page
de.jpg (76660 bytes)
System board may vary from the one shown.
Connect the hard drive data cable to system board connector (J6).
If connecting a hard drive and a zip drive, use cable drive 0 to hard drive and drive 1 to zip drive.
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Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home Removal & Replacement Jumpers & Switches Specifications
Removal and Replacement
Service Considerations - Zip Drive Cable Positions
Cable Positions
Optical Drive Digital Creativity
Imaging Center
3.5-Inch Hard Drive
5.25-Inch Hard Drive
Zip Drive
Diskette Drive Service Considerations
Index Page
df.jpg (70984 bytes)
Connecting Zip Drive Cable
Without CD-RW:
Use the same cable to connect the CD/DVD and Zip drive.
Connect the data cable drive 0 to CD/DVD and drive 1 to Zip drive, then connect to system board (J7 or IDE2).
With CD­RW:
Use the same cable to connect the hard drive and Zip drive.
Connect the data cable drive 0 to hard drive and drive 1 to Zip drive, then connect to system board (J6 or IDE1).
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Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index Product Description Troubleshooting Illustrated Parts
Home Removal & Replacement Jumpers & Switches Specifications
Removal and Replacement
Service Considerations - Diskette Drive Cable Positions
Cable Positions
Optical Drive Digital Creativity
Imaging Center
3.5-Inch Hard Drive
5.25-Inch Hard Drive Zip Drive
Diskette Drive
Service Considerations Index Page
dh.jpg (75273 bytes)
System board may vary from the one shown.
Connect diskette drive data cable to system board connector (J5 or FDD1).
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