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Appendix A: BIOS POST Error Codes
Appendix A
BIOS POST 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.
The fatal errors are usually communicated through repeated patterns of audible
beeps. Each pattern of audible beeps listed below corresponds to its respective
error.
BIOS Error Beep Codes
BIOS POST Error Beep Codes
Beep Code/LED
Error Message
Description
1 beep
Refresh
Ready to boot
5 short beeps + 1 long beep
Memory error
No memory detected in the system
5 beeps
No Con-In or No Con-
Out devices
Con-In includes USB or PS/2 key-
board, PCI or Serial Console Redirec-
tion, IPMI KVM or SOL.
Con-Out includes Video Controller,
PCI or Serial Console Redirection,
IPMI SOL.
1 beep per device
Refresh
1 beep or each USB device detected
X10DP Motherboard IPMI Error Codes
1 Continuous Beep
System OH
System Overheat
