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A Board Status and Error Messages
This appendix describes status error messages generated by the Desktop Board’s
BIOS. The BIOS indicates these error messages with LED blink codes, speaker beep
codes, and by text displayed on the PC monitor.
Front-panel Power LED Blink and Internal
Speaker Beep Codes
Basic status and error messages are provided through the front-panel power LED blink
codes as well as through audible beep codes on systems with an internal speaker
connected to the internal speaker header. Blink/beep codes represent their respective
messages as shown in Table 25.
Table 25.
Front-panel Power LED Blink and Internal Speaker Beep Codes
Type Pattern
CPU Initialization Beep and blink code: 0.1 second beep/blink within the first second
after pressing the power button.
Completion of POST Beep and blink code: 0.1 second beep/blink between POST
completion and boot device continuing the boot process.
BIOS update in progress Beep code: none.
Blink code: on-off (0.5 second each); pattern repeats until BIOS
update is complete.
Video error Beep and blink code: on-off (0.5 second each) two times, then 3.0
second pause (off); entire pattern repeats (beeps/blinks and
pause) until system is powered off.
Memory error Beep and blink code: on-off (0.1 second each) three times, then
1.5 second pause (off); entire pattern repeats (beeps/blinks and
pause) until system is powered off.
Thermal warning Beep and blink code: on-off (0.5 second each) four times, then 3.0
second pause (off); entire pattern repeats (beeps/blinks and
pause) 16 times, then ends.
NOTE
BIOS status and error beep codes can be heard through an internal speaker if the
internal speaker is connected to the internal mono speaker header (see Figure 1, BB
on page 12).