Intel BLKD945GCLF, 10-Pack BLKD945GCLF?KIT ユーザーズマニュアル

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The front-panel power LED is used by the BIOS to display messages.  For example, the 
LED is on when the system is powered on, and blinks off for 0.5 second when 
processor initialization is complete.  In addition, whenever a recoverable error occurs 
during POST, the BIOS causes the front-panel power LED to blink an error message 
describing the problem (see Table 8).  

Processor initialization complete 

On when system powers up, then off for 0.5 second 

POST complete 

On when system powers up, then off for 0.5 second 

BIOS update in progress 

Off when update begins, then on for 0.5 second, then off 
for 0.5 second; pattern repeats until BIOS update is 
complete 

Video error 

On-off (0.5 second each) two times, then 3.0 second pause 
(off) between on-off blink pattern; repeat entire pattern 
(two on-off blinks and pause) until system is powered off 

Memory error 

On-off (0.5 second each) three times, then 3.0 second 
pause (off) between on-off blink pattern; repeat entire 
pattern (three on-off blinks and 3-second pause) until 
system is powered off 

Thermal warning 

On-off (0.5 second each) four times, then 3.0 second 
pause (off) between on-off blink pattern; repeat entire 
pattern (four on-off blinks and 3-second pause) until 16

th

 

on blink, then end 

 

The BIOS beep codes are listed in Table 9.  These beep codes can be heard through a 
speaker attached to the board’s line out jack (see Figure 2, B on page 14. 

Memory error 

Three long beeps 

1280 Hz 

Thermal warning  Four alternating beeps:   

High tone, low tone, high tone, low tone 

High tone:  2000 Hz 
Low tone:  1600 Hz