Compaq.com - Compaq Presario Maintenance and Service Guide - 3500 Series
United States December 9, 2002
Maintenance & Service Guide
Presario 3500 Series Personal Computers
MSG Index | Home | Preface | Product Description | Troubleshooting | Illustrated Parts
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Removal & Replacement
Jumpers & Switches | Specifications | Connector Pins | Power Cord Requirements
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 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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