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 upon each
system boot, errors may occur.
Non-fatal errors
are those which, in most cases, allow the system to continue to
boot. These error messages normally appear on the screen.
Fatal errors
will not allow the system to continue with 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 cor-
responding error.
A-1 BIOS Error Beep Codes
Motherboard BIOS 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 con-out
devices
Con-in includes USB or PS/2 keyboard,
PCI or serial console redirection, and
IPMI KVM or SOL.
Con-out includes the video controller,
PCI or serial console redirection, and
IPMI SOL.
1 beep per device
Refresh
1 beep for each USB device detected
IPMI Error Codes
1 Continuous beep
System OH
System overheat
