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Compaq.com - Compaq Discovery 1900 Series Maintenance and Service Guide - Models: 1905, 1910, 1915, and 1920
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Maintenance & Service Guide
Presario 1900 Series
Models: 1905, 1906, 1910, 1915, 1919, 1920, 1922, and 1925
| Home Page | Notice | Preface | Product Description | Troubleshooting Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications Pin Assignments | Battery Pack Operations
Models and
Features
Controls and
Lights
Status Panel
Left Side
Components
Right Side
Components
Bottom of
Unit
Left Side
and Top
Wedge
Components
Right Side
Wedge
Components
Rear
Connectors
Port
Replicator
Connectors
Welcome to the Maintenance & Service Guide (MSG). 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.
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Port
Replicator
Components
Power
Management
This MSG will be periodically maintained and updated online as needed.
For content comments or questions, contact the Editor.
To report a technical problem, contact your Regional Support Center or IM Help Center.
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United States June 27, 2004 |
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Maintenance & Service Guide
Presario 1900 Series
Models: 1905, 1906, 1910, 1915, 1919, 1920, 1922, and 1925
| Home Page | Notice | Preface | Product Description | Troubleshooting Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications Pin Assignments | Battery Pack Operations
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.
Ó 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 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 1900 Series Portable Computers
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Compaq.com - Compaq Presario 1900 Series Maintenance and Service Guide - Models: 1905, 1906, 1910, 1915, 1919, and 1920
First Edition (Oct. 1998)
Compaq Computer Corporation
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Compaq.com - Compaq Presario 1900 Series Maintenance and Service Guide - Models: 1815, 1820, and 1825
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Maintenance & Service Guide
Presario 1900 Series
Models: 1905, 1906, 1910, 1915, 1919, 1920, 1922, and 1925
| Home Page | Notice | Preface | Product Description | Troubleshooting Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications Pin Assignments | Battery Pack Operations
Preface
This Maintenance and Service Guide is a troubleshooting guide that can be used for reference when servicing the Compaq Presario 1900 Series Portable Computers.
Compaq Computer Corporation reserves the right to make changes to the Compaq Presario 1900 Series Portable Computers without notice.
Symbols
The following words and symbols mark special messages throughout this guide.
WARNING: Text set off in this manner indicates that failure to follow directions in the warning could result in bodily harm or loss of life.
CAUTION: Text set off in this manner indicates that failure to follow directions could result in damage to equipment or loss of data.
IMPORTANT: Text set off in this manner presents clarifying information or specific instructions.
NOTE: Text set off in this manner presents commentary, sidelights, or interesting points of information.
Technician Notes
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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 is located on the bottom of the computer.
Locating Additional Information
The following documentation is available to support this product:
●Compaq Presario 1900 Series Portable Computer documentation set
●Introducing Windows 98 Guide
●Service Training Guides
●Compaq Service Advisories and Bulletins
●Compaq QuickFind
●Compaq Service Quick Reference Guide
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Compaq.com - Compaq Presario 1900 Series Maintenance and Service Guide - Models: 1905, 1906, 1910, 1915, 1919, and 1920
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Maintenance & Service Guide
Presario 1900 Series
Models: 1905, 1906, 1910, 1915, 1919, 1920, 1922, and 1925
| Home Page | Notice | Preface | Product Description | Troubleshooting Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications Pin Assignments | Battery Pack Operations
Product Description
Models and
Features
Controls and
Lights
Status Panel
Left Side
Components
Right Side
Components
Bottom of
Unit
Left Side
and Top
Wedge
Components
Right Side
Wedge
Components
Rear
Connectors
Compaq
Presario 1900 Series Portable Computers are a new generation of multimedia portable computers with an ultimate thin and lightweight design, outstanding audio and video, advanced core features, and attractive styling.
The
Removable
Drive Wedge
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Compaq.com - Compaq Presario 1900 Series Maintenance and Service Guide - Models: 1905, 1906, 1910, 1915, 1919, and 1920
Port
Replicator
Connectors
Port
Replicator
Components
Power
Management
provides multimedia expansion capability with a DVD or CD-ROM Drive and a Diskette Drive or LS120 Drive integrated into one removable component.
Compaq
Presario 1900 Series Portable Computers also have an optional integrated 10/100BaseT Ethernet Port Replicator allowing the user to quickly and easily attach or detach the computer from peripheral devices. It contains a full array of ports, some which are accessible while the system is docked to the Port Replicator.
This full-
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Compaq.com - Compaq Presario 1900 Series Maintenance and Service Guide - Models: 1905, 1906, 1910, 1915, 1919, and 1920
function Intel Celeron and Pentium II - based portable computer provides full desktop functionality.
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Compaq.com - Compaq Presario 1900 Series Maintenance and Service Guide - Models: 1905, 1906, 1910, 1915, 1919, and 1920
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United States June 27, 2004 |
COMPAQ |
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SEARCH |
Maintenance & Service Guide
Presario 1900 Series
Models: 1905, 1906, 1910, 1915, 1919, 1920, 1922, and 1925
| Home Page | Notice | Preface | Product Description | Troubleshooting Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications Pin Assignments | Battery Pack Operations
Troubleshooting
Preliminary Steps
Clearing the Power-
On Password
Power-On Self Test (POST)
Compaq Diagnostics
Diagnostic Error
Codes
Troubleshooting
Without Diagnostics
Solving Minor
Problems
Contacting Compaq
Support
This section covers troubleshooting information for the Compaq Presario 1900 Series Portable Computers. The basic steps in troubleshooting include:
1.Follow the Preliminary Steps .
2.Run the Power-On Self-Test (POST).
3.Follow the recommended actions described in the diagnostic tables, if you are unable to run POST or if POST displays an error message.
When following the recommended actions in the Sections on POST and Diagnostic Error Codes perform them
in the order listed. Rerun POST after each recommended action until the problem is solved and no error message occurs. Once the problem is solved, do not complete the remaining recommended actions.
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Compaq.com - Compaq Presario 1900 Series Maintenance and Service Guide - Models: 1905, 1906, 1910, 1915, 1919, and 1920
If the problem is intermittent, check the
NOTE: computer several times to verify that the problem is solved.
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Compaq.com - Compaq Presario 1900 Series Maintenance and Service Guide - Models: 1905, 1906, 1910, 1915, 1919, and 1920
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Maintenance & Service Guide
Presario 1900 Series
Models: 1905, 1906, 1910, 1915, 1919, 1920, 1922, and 1925
| Home Page | Notice | Preface | Product Description | Troubleshooting Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications Pin Assignments | Battery Pack Operations
System Unit
Boards
Display
Assembly
Mass Storage
Devices
Miscellaneous
Hardware and
Plastics Kit
Miscellaneous
Hardware and
Plastics Wedge
Kit
Miscellaneous
Parts
Documentation
and Software
This section provides an illustrated parts breakdown and a reference for spare parts for the Presario 1900 Series Portable Computer.
The computer (1) serial number should be provided to Compaq whenever requesting information or ordering spare parts. The serial number is located on
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bottom of unit.
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Compaq.com - Compaq Presario 1900 Series Maintenance and Service Guide - Models: 1905, 1906, 1910, 1915, 1919, and 1920
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United States June 27, 2004 |
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Maintenance & Service Guide
Presario 1900 Series
Models: 1905, 1906, 1910, 1915, 1919, 1920, 1922, and 1925
| Home Page | Notice | Preface | Product Description | Troubleshooting Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications Pin Assignments | Battery Pack Operations
Removal and Replacement Procedures
This section explains the removal and replacement procedures for the computer.
Serial Number
Electrostatic
Discharge
Service
Considerations
Cables and
Connectors
Preparing the
Computer for
Disassembly
Battery Pack
Hard Drive
Keyboard
Memory
Module
Modem
Heatspreader
Processor
Display Panel
Assembly
Report the computer serial number to Compaq when requesting information or ordering spare parts. The serial number is located on bottom of unit.
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Compaq.com - Compaq Presario 1900 Series Maintenance and Service Guide - Models: 1905, 1906, 1910, 1915, 1919, and 1920
Upper CPU
Cover with
Palmrest and
TouchPad
Hard Drive/
Battery
Charger Board
Converter
Board
Low Voltage
Differential
Signal Board
Fan Assembly
System Board
Speaker
Assembly
Disassembling
the Wedge
DVD or CD
Drive
System to
Wedge
Interface
Board
Diskette Drive
Wedge to Port
Replicator
Interface
Board
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Compaq.com - Compaq Presario 1900 Series Maintenance and Service Guide - Models: 1905, 1906, 1910, 1915, 1919, and 1920
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COMPAQ |
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Maintenance & Service Guide
Presario 1900 Series
Models: 1905, 1906, 1910, 1915, 1919, 1920, 1922, and 1925
| Home Page | Notice | Preface | Product Description | Troubleshooting
| Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications
Pin Assignments | Battery Pack Operations
Specifications
This chapter covers the following specifications of Compaq Presario 1900 Series Portable Computers:
●Physical and Environmental
●System Interrupts
●System DMA
●System I/O Addresses
●System Memory Catalog
●Display
●Diskette Drive or LS-120 Drive
●Hard Drive
●CD ROM or DVD Drive
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Maintenance & Service Guide
Presario 1900 Series
Models: 1905, 1906, 1910, 1915, 1919, 1920, 1922, and 1925
| Home Page | Notice | Preface | Product Description | Troubleshooting Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications Pin Assignments | Battery Pack Operations
Connector Pin Assignments
This appendix provides connector pin assignment tables for Compaq Presario 1900 Series Portable Computers. For more information on connectors, refer to the section on Rear Connectors .
NOTE: The signals in all tables of this appendix are considered active high unless otherwise indicated by an asterisk (*).
|
|
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
Serial Connector
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Compaq.com - Compaq Presario 1900 Series Maintenance and Service Guide - Models: 1905, 1906, 1910, 1915, 1919, and 1920
Connector |
Pin |
Signal |
|
1 |
Carrier Detect |
|
2 |
Receive Data |
|
3 |
Transmit Data |
|
4 |
Data Terminal Ready |
|
5 |
Signal Ground |
|
6 |
Data Set Ready |
|
7 |
Ready to Send |
|
8 |
Clear to Send |
|
9 |
Ring Indicator |
|
Keyboard/Mouse Connector |
|
Connector |
Pin |
Signal |
|
1 |
Data |
|
2 |
Not defined |
|
3 |
Ground |
|
4 |
+5 VDC |
|
5 |
Clock |
|
6 |
Not defined |
|
External VGA Monitor Connector |
|
Connector |
Pin |
Signal |
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1 |
Red Analog |
2 |
Green Analog |
3 |
Blue Analog |
4 |
Not connected |
5 |
Ground |
6 |
Ground Analog |
7 |
Ground Analog |
8 |
Ground Analog |
9 |
Not connected |
10 |
Ground |
11 |
Monitor Detect |
12 |
DDC2B Data |
13 |
Horizontal Sync |
14 |
Vertical Sync |
15 |
DDC2B Clock |
|
Universal Serial Bus Connector |
|
Connector |
Pin |
Signal |
|
1 Ground |
|
2 D+
3 D-
4 Power
Modem Connector
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Compaq.com - Compaq Presario 1900 Series Maintenance and Service Guide - Models: 1905, 1906, 1910, 1915, 1919, and 1920
Connector |
Pin |
Signal |
1Unused
2Unused
3Tip
4Ring
5Unused
6Unused
This information was not available at time of publication.
Port Replicator Connector
Pin Signal |
Pin Signal |
Pin Signal |
Pin Signal |
This information was not available at time of publication.
LAN Connector
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Battery
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Maintenance & Service Guide
Presario 1900 Series
Models: 1905, 1906, 1910, 1915, 1919, 1920, 1922, and 1925
| Home Page | Notice | Preface | Product Description | Troubleshooting
Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications
Pin Assignments | Battery Pack Operations
Battery Pack Operating Time
This section covers the following information concerning battery pack operating time:
●Increasing battery pack operating time
●Conditioning a battery pack
●Disposing of a used battery pack
Increasing Battery Pack Operating Time
Battery pack operating time differs depending on several variables. To avoid unnecessary replacement, consider the following variables when determining how long a charged battery pack should last:
●Power management settings
●Hardware configuration
●Software applications
●Installed options
●Display brightness
●Hard drive usage
●Changes in operating temperature
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Battery
● Type and number of installed PC Cards
NOTE: The power consumption requirements for PC Cards vary widely. Some cards drain the battery pack very rapidly.
Battery pack operating time can be increased by as much as 50 percent by controlling the energy required by the computer and the energy stored in the battery pack.
Minimizing the Energy Required
To minimize the energy required by the computer, follow these steps:
●Set the power conservation levels in the Power Management utility to Maximum .
●Customize the timeout value to work more efficiently with the applications. The amount of battery life depends on the values selected.
Maximizing the Energy Stored
To maximize the energy stored in the battery pack, follow these guidelines:
●Condition the battery pack at least every 30 days to improve overall battery performance.
●Keep a battery pack in the computer when using it with AC power to supply the battery pack with a constant trickle charge.
●Store the battery pack in a cool, dry place when not in use.
Conditioning a Battery Pack
CAUTION: To avoid a loss of data, ensure that all data is saved before discharging a battery pack.
To condition a battery pack, complete the following steps:
1.Plug in the AC adapter and allow the battery to charge until the fast charge arrow on the display disappears. Your battery gauge may read 100 percent for a period of time before the arrow disappears. Do not unplug the AC adapter until the arrow disappears.
2.Unplug the AC adapter and allow the battery to drain until the computer reaches hibernation and turns itself off.
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Battery
CAUTION: Do not plug the AC adapter during this process or you will need to restart with step number 1. You may use the computer while the battery is draining.
3.Your battery is re-conditioned.
4.Plug in the AC adapter and begin using the computer. The table below shows battery pack charge times by model.
Battery Charge Time
Computer |
On Line |
Off Line |
Li ion Battery Pack |
4.5 hours premature termination |
2:50 hr |
Disposing of a Used Battery Pack
In the interest of safeguarding our environment. Compaq Computer Corporation recommends that nickel metal hydride (NiMH) and lithium ion (Li ion) battery packs be recycled. Battery packs should be handled in accordance with country, state, province, or local regulations.
CAUTION: Never attempt to open or service a battery pack. Opening a battery pack not only damages the pack and makes it unusable, but also expose potentially harmful battery components.
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Compaq.com - Compaq Presario 1900 Series Maintenance and Service Guide - Models: 1905, 1906, 1910, 1915, 1919, and 1920
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Maintenance & Service Guide
Presario 1900 Series
Models: 1905, 1906, 1910, 1915, 1919, 1920, 1922, and 1925
| Home Page | Notice | Preface | Product Description | Troubleshooting Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications Pin Assignments | Battery Pack Operations
Models and Features
Models and
Features
Controls and
Lights
Status Panel
Left Side
Components
Right Side
Components
Bottom of
Unit
Left Side
and Top
Wedge
Components
Right Side
Wedge
Components
Rear
Connectors
Compaq Discovery 1900 Series Portable Computer Models
|
Model |
|
1905 |
Display |
12. 1" TFT |
Processor |
Intel Celeron/266-MHz |
|
w/128K Cache |
Hard Drive |
4.0-GB |
Modem |
56.0 Kbps PCI Data/Fax |
CD Drive |
24X CD-ROM |
|
Model |
|
1910 |
Display |
12.1" TFT or 13. 3" TFT |
Processor |
Intel Celeron/300-MHz |
|
w/128K Cache or |
|
PII/300-MHz w/512 |
|
Cache |
Hard Drive |
6.4-GB or 4.8-GB |
Modem |
56.0 Kbps PCI Data/Fax |
|
or 56.0 Kbps PCI Data/ |
|
Fax I |
Model 1906
12. 1" TFT
Intel Celeron/266-MHz
w/128K Cache
4.0-GB
56.0 Kbps PCI Data/Fax
24X CD-ROM
Model 1915
12. 1" TFT or 13.3" TFT
Pentium II/266-MHz w/512K or 256K Cache or PII/300-MHz w/512 Cache
4.0-GB
56.0 Kbps PCI Data/Fax or
56.0 Kbps PCI Data/Fax (International)
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Port |
|
DVD or CD Drive |
24X CD Drive or 4X DVD |
DVD or 24X CD Drive |
||
Replicator |
|
|
|
|
|
|
|
|
|
|
|
||
Connectors |
|
|
|
|
|
|
|
|
|
|
|
||
|
|
Model |
|
Model |
||
|
|
|
|
|||
|
|
|
||||
Port |
|
|
||||
|
|
1919 |
|
1920 |
||
Replicator |
|
|
|
|||
|
Display |
|
|
|
||
|
13. 3" TFT |
13. 3" TFT |
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Components |
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Processor |
Intel Celeron/300-MHz |
Pentium II/300-MHz |
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Power |
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w/128K Cache |
w/256K Cache |
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Management |
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Hard Drive |
6.4-GB |
4.0-GB or 6.4-GB |
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Modem |
K-56.0 Kbps PCI Data/ |
56.0 Kbps PCI Data/Fax |
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Fax |
or |
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56.0 Kbps PCI Data/Fax |
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(International) |
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DVD Drive |
DVD Drive |
DVD Drive |
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Next Page |
1.800.AT.COMPAQ
privacy and legal statement
file:///C|/SERVICE%20MANUALS/COMPAQ%20_%20chec...201915%201919%201920%201922%201925/npage1.html (2 of 2)6/27/2004 5:04:46 AM
Compaq.com - Compaq Presario 1900 Series Maintenance and Service Guide - Models: 1905, 1906, 1910, 1915, 1919, and 1920
|
|
United States June 27, 2004 |
COMPAQ |
|
STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | |
|
|
SEARCH |
Maintenance & Service Guide
Presario 1900 Series
Models: 1905, 1906, 1910, 1915, 1919, 1920, 1922, and 1925
| Home Page | Notice | Preface | Product Description | Troubleshooting Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications Pin Assignments | Battery Pack Operations
Controls and Lights
Models and
Features
Controls and
Lights
Status Panel
Left Side
Components
Right Side
Components
Bottom of
Unit
Left Side
and Top
Wedge
Components
Right Side
Wedge
Components
Rear
Connectors
Port
Replicator
Connectors
Port
Replicator
Components
Front of Unit
1.Display 9. TouchPad
2.10. Left Backlight TouchPad Switch Button Button
3.Instant |
11. Power |
Internet |
(On/Off) |
Access |
Light |
Button |
|
4.Instant |
12. Scroll |
Search |
(Up/ |
Button |
Down) |
|
Button |
5.Power 13. (On/Off) Battery Button Charge
Light
6.Instant 14.
E- Display
Commerce Panel
(or Release
Favorite Button
Website)
Button
7. Instant |
15. Right |
TouchPad |
|
Button |
Button |
file:///C|/SERVICE%20MANUALS/COMPAQ%20_%20chec...201915%201919%201920%201922%201925/npage2.html (1 of 2)6/27/2004 5:04:47 AM
Compaq.com - Compaq Presario 1900 Series Maintenance and Service Guide - Models: 1905, 1906, 1910, 1915, 1919, and 1920 |
|
|
|
|
|
|
|
Power |
|
8. |
16. |
Management |
|
Keyboard |
Integrated |
|
|
|
Speakers |
|
|
|
1.800.AT.COMPAQ
privacy and legal statement
file:///C|/SERVICE%20MANUALS/COMPAQ%20_%20chec...201915%201919%201920%201922%201925/npage2.html (2 of 2)6/27/2004 5:04:47 AM
Compaq.com - Compaq Presario 1900 Series Maintenance and Service Guide - Models: 1905, 1906, 1910, 1915, 1919, and 1920
|
United States June 27, 2004 |
COMPAQ |
STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | |
|
SEARCH |
Maintenance & Service Guide
Presario 1900 Series
Models: 1905, 1906, 1910, 1915, 1919, 1920, 1922, and 1925
| Home Page | Notice | Preface | Product Description | Troubleshooting Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications Pin Assignments | Battery Pack Operations
Status Panel Lights
Models and
Features
Controls and
Lights
Status Panel
Left Side
Components
Right Side
Components
Bottom of
Unit
Left Side
and Top
Wedge
Components
Right Side
Wedge
Components
Rear
Connectors
Status
Panel
Lights
1.AC Adapter Light
2.Num Lock Light
3.Caps Lock Light
4.Scroll Lock Light
file:///C|/SERVICE%20MANUALS/COMPAQ%20_%20chec...201915%201919%201920%201922%201925/npage3.html (1 of 2)6/27/2004 5:04:48 AM