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
corresponding error.
A-1 BIOS Error Beep Codes
BIOS Error Beep Codes
Beep Code/LED
Error Message
Description
1 beep
Refresh
Circuits have been reset.
(Ready to power up)
5 short beeps + 1 long
beep
Memory error
No memory detected in the
system
5 long beeps + 2 short
beeps
Display memory
read/write error
Video adapter missing or with
faulty memory
1 continuous beep
System OH
System Overheat
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