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A.
BIOS POST Codes
Recoverable POST Errors
Terminal POST Errors
007-4960-004
Appendix A
BIOS Power-on Self Test
This appendix lists and describes the BIOS power-on self-test (POST) messages and codes.
The POST codes are divided into two categories: recoverable and terminal.
When a recoverable type of error occurs during POST, the BIOS will display a POST code that
describes the problem. BIOS may also issue one of the following beep codes:
•
1 long and two short beeps - video configuration error
•
1 repetitive long beep - no memory detected
If a terminal type of error occurs, BIOS shuts down the system. Before doing so, BIOS writes the
error to port 80h, attempts to initialize video, and writes the error in the top left corner of the
screen.
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