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BIOS PostCodes
ALR
AST
DTK
HP
IBM
NCR

Intel Motherboards:
T440BX
VC820

AST BIOS Beep Codes:

Beeps

Error Message

Description

1 short CPU register test failure The CPU has failed
2 short Keyboard controller buffer failure The keyboard controller has failed
3 short Keyboard controller reset failure The keyboard controller has failed or the motherboard circuitry is faulty
4 short Keyboard communication failure Either the keyboard controller IC or the associated circuitry has failed.  replace the keyboard first, then is still faulty, replace the keyboard controller IC
5 short Keyboard input failure The keyboard controller IC has failed.   Replace the IC
6 short System board chipset failure The chipset on the motherboard has failed.  Replace the motherboard
9 short BIOS ROM checksum error The BIOS ROM has failed.  If possible, replace the BIOS on the motherboard
10 short System timer test failure The system clock IC has failed
11 short ASIC failure Motherboard circuitry has failed.   Replace the motherboard
12 short CMOS RAM shutdown register failure THE real time clock/CMOS IC failed.   Replace the CMOS or motherboard
1 long DMA controller 0 failure The DMA controller IC for channel 0 has failed.  If possible, replace the IC
1 long, 1 short DMA controller 1 failure The DMA controller IC for channel 1 has failed.  If possible, replace the IC
1 long, 2 short Video vertical retrace failure The video adapter has probably failed.   Replace the video adapter
1 long, 3 short Video memory test failure The video adapter's memory has failed.   Replace the video adapter
1 long, 4 short Video adapter failure The video adapter has failed.   Replace the video adapter
1 long, 5 short 64KB memory failure A failure has occurred in the base 64KB of memory.  If possible, replace the RAM IC
1 long, 6 short Unable to load interrupt vectors The BIOS was unable to load the interrupt vectors into memory
1 long, 7 short Unable to initialize video This a video problem. Replace the video adapter first.  If problem is still present, replace the motherboard
1 long, 8 short Video memory failure The is a failure in the video memory.   Replace the video adapter first.  If problem is still present, replace the motherboard

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