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Maintenance and Service Guide
Compaq Presario 7400 Series Computers
Troubleshooting
Power-On Self Test
(POST)
Configuration
Diagnostics Software
Troubleshooting without
diagnostics
TROUBLESHOOTING
Power-On Self Test (POST)
POST
is a series of diagnostic tests that run automatically when the system is turned on. After the
computer is turned on,
POST
checks the following assemblies to ensure that the computer system is
functioning properly:
Keyboard
●
System board
●
Memory modules
●
Video memory
●
Diskette drives
●
Hard drive
●
Power supply
●
POST
also detects the type of mass storage devices installed in the computer.
If
POST
finds an error in the system, an error condition is indicated by an audible and/or visual
message. The table below gives explanations of the error codes and a recommended course of action.
NOTE:
An external speaker must be installed into the speaker output connector to
hear audible beeps during
POST
.
Click a link below to find the probable cause and recommended action for a given error message.
Compaq.com - Compaq Presario Maintenance and Service Guide - 7400 Series
http://www.compaq.com/athome/support/msgs/7400/post.html (1 of 4) [1/8/2002 3:52:58 PM]
