A-1
Appendix A: BIOS POST Error Codes
Appendix A
BIOS POST Error 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
the bootup process. The error messages normally appear on the screen.
Fatal errors
will not allow the system to continue to bootup. If a fatal error oc-
curs, 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 POST 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: USB or PS/2 keyboard, PCI or
Serial Console Redirection, IPMI KVM
or SOL
Con-Out: Video Controller, PCI or Serial
Console Redirection, IPMI SOL
IPMI Error Codes
1 Continuous Beep
System OH
System OverheatING
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