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Appendix A: BIOS Error Beep 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.
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 beeps No Con-In or
Con-Out devices
Con-In includes USB or PS/2 keyboard,
PCI or Serial Console Redirection.
Con-Out includes Video Controller, PCI or
Serial Console Redirection.
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