Intel D945GCLF2 Product Guide - Page 45

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 9). Table 9. BIOS Front-panel Power LED Blink Codes Type Processor initialization complete POST complete BIOS update in progress Pattern On when system powers up, then off for 0.5 second On when system powers up, then off for 0.5 second 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 10. 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 10. BIOS Beep Codes Type Pattern Memory error Three long beeps Thermal warning Four alternating beeps: High tone, low tone, high tone, low tone Frequency 1280 Hz High tone: 2000 Hz Low tone: 1600 Hz 45