Compaq Presario 5000 Series, Maintenance And Service Manual

Page: 173 / 216

United States
Compaq Presario Internet PC 5000 Series Computers
TROUBLESHOOTING
PRODUCT DESCRIPTION
TROUBLESHOOTING
ILLUSTRATED PARTS CATALOG
REMOVAL AND REPLACEMENT PROCEDURES JUMPER AND SWITCH INFORMATION SPECIFICATIONS
CLEARING CMOS
POWER-ON SELF
TEST (POST)
CONFIGURATION
DIAGNOSTIC
ERROR CODES
TROUBLESHOOTING
WITHOUT
DIAGNOSTICS
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
1.
System board
2.
Memory modules
3.
Video memory
4.
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
An external speaker must be installed into the speaker output connector to hear the
audible beeps during POST .
Click a link below to find the probable cause and recommended action for a given error message.
Disk A Error Keyboard Controller Error System BIOS Shadowed
Extended RAM failed at offset Keyboard Error System Cache Error
Failing Bits Operating System Not Found System CMOS Checksum Back