Troubleshooting Without Diagnostics - Compaq 1200US - Presario - Celeron 800 MHz Maintenance And Service Manual

Before You Begin
Removal Sequence
Product Description

Troubleshooting Without Diagnostics

This section provides information about how to identify and correct some common hardware, memory, and software
problems. It also explains several types of common messages that may be displayed on the screen. The following pages
contain troubleshooting information on:
Audio
Battery/Battery gauge
CD drive
Diskette/Diskette drive
Display
Hard drive
Hardware Installation
Since symptoms can appear to be similar, carefully match the symptoms of the computer malfunction against the problem
description in the Troubleshooting tables to avoid a misdiagnosis.
To avoid a potential shock hazard during troubleshooting procedures, disconnect all power sources
WARNING:
before removing the keyboard cover or the display bezel.
Before Replacing Parts
Verify that cables are connected properly to the suspected defective parts.
Run Computer Setup after connecting external devices.
Verify that all required device drivers are installed.
Verify that all required changes have been made to the CONFIG.SYS file.
Verify that all required changes have been made to the AUTOEXEC.BAT file.
Verify that all printer drivers have been installed for each application.
Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252
Presario 1200 Series
Specifications
Troubleshooting
Pin Assignments
Memory
PC Card
Power
Printer
Touch Pad
Keyboard/Numeric keypad
Parts Catalog
Battery Operations
Index