Appendix A: BIOS Codes
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Appendix A
BIOS Codes
BIOS Error POST (Beep) Codes
During the POST (Power-On Self-Test) routines, which are performed each time the system
is powered on, errors may occur.
Non-fatal errors are those which, in most cases, allow the system to continue with bootup.
The error messages normally appear on the screen.
Fatal errors will not allow the system to continue to bootup. 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.
BIOS Beep (POST) Codes
Beep Code 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 system
5 beeps Display memory read/write error Video adapter missing or with faulty memory
1 long continuous beep System OH System overheat
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