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
procedure. 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.
These fatal errors are usually communicated through a series of audible beeps. The table
shown below lists some common errors and their corresponding beep codes encountered
by users.
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
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