A-1
Appendix A: BIOS POST Error Codes
Appendix A
BIOS Error Beep Codes
During the POST (Power-On Self-Test) routines, which are performed at each
system boot, errors may occur.
Non-fatal errors are those which, in most cases, allow the system to continue to
boot. The error messages normally appear on the screen.
Fatal errors will not allow the system to continue with bootup procedure. If a fatal
error occurs, you should consult with your system manufacturer for possible repairs.
These fatal errors are usually communicated through a series of audible beeps.
The numbers on the fatal error list correspond to the number of beeps for the cor-
responding error.
A-1 BIOS Error Beep Codes
BIOS Error Beep Codes
Beep Code/LED Error Message Description
3 short beeps Refresh Circuits have been reset.
(Ready to power up)
5 short beeps + 1 long
beep
Memory error No memory detected in the
system
No beeps Display memory
read/write error
Video adapter missing or with
faulty memory
1 continuous beep System OH System Overheat
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