A Error Messages and Indicators
Intel Desktop Board DX79TO reports POST errors in three ways:
•By sounding a beep code and blinking the front panel power LED
•By displaying an error message on the monitor
•By displaying diagnostic progress codes (POST codes)
BIOS Error Codes
Whenever a recoverable error occurs during POST, the BIOS causes the board’s speaker to beep and the front panel power LED to blink an error message indicating the problem (see Table 15).
Table 15. BIOS Beep Codes
Type | Pattern |
|
|
Processor | One 0.5 second beep when the CPU initialization process |
initialization complete | completes. |
|
|
POST complete | One 0.5 second beep when POST completes. |
|
|
Video error | |
| (off), entire pattern repeats (beeps and pause) until the system |
| is powered off. |
|
|
Memory error | |
| (off), entire pattern repeats (beeps and pause) until the system |
| is powered off. |
|
|
Thermal trip warning | |
| (off), entire pattern repeats (beeps and pause) until the |
| sixteenth beep, then ends. |
|
|
Table 16. Front-panel Power LED Blink Codes
Type | Pattern |
|
|
Processor | On when the system powers up, then off for 0.5 seconds. |
initialization complete |
|
|
|
POST complete | On when the system powers up, then off for 0.5 seconds. |
|
|
BIOS update in | Off when the update begins, then on for 0.5 seconds, then off for |
progress | 0.5 seconds. The pattern repeats until the BIOS update is |
| complete. |
|
|
Video error | |
| (off), entire pattern repeats (blink and pause) until the system is |
| powered off. |
|
|
Memory error | |
| (off), entire pattern repeats (blinks and pause) until the system |
| is powered off. |
|
|
Thermal trip warning | |
| (off), entire pattern repeats (blinks and pause) until the |
| sixteenth blink, then ends. |
|
|
69
