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A Board Status and Error Messages
This appendix describes status and error messages generated by the Desktop Board’s
BIOS. The BIOS indicates these error messages with front-panel Power LED blink
codes, speaker beep codes, and by displaying text on the video monitor.
BIOS Beep Codes
The BIOS uses audible beep codes to signal status messages and error messages
indicating recoverable errors that occur during the POST. The beep codes are listed in
Table 12. These beep codes can be heard t
hro
ugh a speaker attached to the board’s
line out audio jack (see Figure 2, B on page 15).
Table 12. BIOS Beep Codes
Type Pattern Frequency
F2 Setup/F10 Boot
Menu Prompt
One 0.5-second beep when the BIOS is
ready to accept keyboard input
932 Hz
Video error On-off (1.0 second each) two times, then a
2.5-second pause (off); the entire pattern
repeats (beeps and pause) once and the
BIOS will continue to boot.
932 Hz
When no VGA option ROM
is found.
Memory error On-off (1.0 second each) three times, then
a 2.5-second pause (off); the entire pattern
repeats (beeps and pause) until the system
is powered off.
932 Hz
Thermal trip warning Alternate high and low beeps (1.0 second
each) for eight beeps, followed by system
shut down.
High beep 2000 Hz
Low beep 1500 Hz