A BIOS Error Messages

BIOS Front-panel Power LED Blink Codes

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).

Table 8. BIOS Front-panel Power LED Blink Codes

Type

Pattern

 

 

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 16th

 

on blink, then end

 

 

BIOS Beep Codes

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.

Table 9. BIOS Beep Codes

Type

Pattern

Frequency

 

 

 

 

Memory error

Three long beeps

1280 Hz

 

 

 

 

 

Thermal warning

Four alternating beeps:

High tone:

2000 Hz

 

High tone, low tone, high tone, low tone

Low tone:

1600 Hz

 

 

 

 

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Intel D945GCLF manual Bios Error Messages, Bios Front-panel Power LED Blink Codes, Bios Beep Codes