Compaq Presario 7400 Series - Page 140

United States
Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index Product Description Troubleshooting Illustrated Parts Catalog
Home Removal & Replacement Jumper & Switch Information Specifications
Troubleshooting
Clearing CMOS
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.
Diskette Drive A or B Error Keyboard Controller Error System BIOS Shadowed
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