Power-On Self Test (Post) - Compaq Presario 5UV430 Maintenance And Service Manual

Compaq Presario Internet PC 5000 Series Computers
PRODUCT DESCRIPTION
REMOVAL AND REPLACEMENT PROCEDURES

Power-On Self Test (POST)

CLEARING CMOS
POWER-ON SELF
POST is a series of diagnostic tests that run automatically when the system is turned on. After the
TEST (POST)
computer is turned on, POST checks the following assemblies to ensure that the computer system is
functioning properly:
CONFIGURATION
Keyboard
1.
DIAGNOSTIC
System board
ERROR CODES
2.
Memory modules
3.
TROUBLESHOOTING
WITHOUT Video memory
4.
DIAGNOSTICS
Disk drives
5.
Hard drives
6.
Power supply
7.
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
Click a link below to find the probable cause and recommended action for a given error message.
Disk A Error
Extended RAM failed at offset
Failing Bits
TROUBLESHOOTING
JUMPER AND SWITCH INFORMATION
An external speaker must be installed into the speaker output connector to hear the
audible beeps during POST.
Keyboard Controller Error
Keyboard Error
Operating System Not Found
ILLUSTRATED PARTS CATALOG
SPECIFICATIONS
System BIOS Shadowed
System Cache Error
System CMOS Checksum Back
United States
TROUBLESHOOTING