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X11DPG-SN User's Manual
A.1 BIOS Error POST (Beep) Codes
Note: An optional external speaker can be connected to the speaker/buzzer header
located at JD1. Please refer to Chapter 2 for more information on JD1.
During the POST (Power-On Self-Test) process, which is performed each time the system is
powered on, system errors may be detected.
Non-fatal errors are those which, in most cases, allow the system to continue with the boot-
up process. The error messages normally appear on the screen.
Fatal errors are those which will not allow the system to continue to boot up. 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.
Beep Code
Error Message
1 beep
Refresh
5 short, 1 long
Memory error
5 long, 2 short
Display memory read/write error
1 long continuous
System OH
A.2 Additional BIOS POST Codes
The AMI BIOS supplies additional checkpoint codes, which are documented online at
www.supermicro.com/support/manuals/
When BIOS performs the Power On Self Test, it writes checkpoint codes to I/O port 0080h.
If the computer cannot complete the boot process, a diagnostic card can be attached to the
computer to read I/O port 0080h (Supermicro p/n AOC-LPC80-20).
For information on AMI updates, please refer to http://www.ami.com/products/.
Appendix A
BIOS Codes
BIOS Beep (POST) Codes
Description
Circuits have been reset (Ready to power up)
No memory detected in system
Video adapter missing or with faulty memory
System overheat condition
("AMI BIOS POST Codes User's Guide").
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