Appendix A: BIOS Codes
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Appendix A
BIOS Codes
A.1 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 the boot-up
process. The error messages normally appear on the screen.
Fatal errors
are those which will not allow the system to continue the boot-up 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 Beep (POST) Codes
Beep Code
Error Message
Description
1 beep
Refresh
Circuits have been reset (Ready to power up)
5 short, 1 long
Memory error
No memory detected in system
5 long, 2 short
Display memory read/write error
Video adapter missing or with faulty memory
1 long continuous
System OH
System overheat condition
