Appendix A Bios Codes; Bios Error Post (Beep) Codes - Supermicro X11DDW-L/NT User Manual

Super X11DDW-L/NT User's Manual
A.1 BIOS Error POST (Beep) Codes
Note: For BIOS beep codes to work properly, please connect an optional external
speaker 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
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
142