AMI BIOS Beep Codes:

Beeps - Error Message - Description
1 short - DRAM refresh failure - The programmable interrupt timer or programmable interrupt controller has probably failed.
2 short - Memory parity error - A memory parity error has occurred in the first 64K of RAM. The RAM IC is probably bad.
3 short - Base 64K memory failure - A memory failure has occurred in the first 64K of RAM. The RAM IC is probably bad.
4 short - System timer failure - The system clock/timer IC has failed or there is a memory error in the first bank of memory.
5 short - Processor error - The system CPU has failed.
6 short - Gate A20 failure - The keyboard controller IC has failed, which is not allowing Gate A20 to switch the processor to protected mode. Replace the keyboard controller.
7 short - Virtual mode processor exception error - The CPU has generated an exception error because of a fault in the CPU or motherboard circuitry.
8 short - Display memory read/write error - The system video adapter is missing or defective.
9 short - ROM checksum error - The contents of the system BIOS ROM does not match the expected checksum value. The BIOS ROM is probably defective and should be replaced.
10 short - CMOS shutdown register read/write error - The shutdown for the CMOS has failed.
11 short - Cache error - The L2 cache is faulty 1 long, 2 short - Failure in video system An error was encountered in the video BIOS ROM, or a horizontal retrace failure has been encountered.
1 long, 3 short - Memory test failure - A fault has been detected in memory above 64KB.
1 long, 8 short - Display test failure - The video adapter is either missing or defective.
2 short - POST Failure - One of the hardware tests have failed.
1 long - POST - All tests passed.

Award BIOS Beep Codes:

Beeps - Error Message - Description
1 long, 2 short - Video adapter error - Either video adapter is bad or is not seated properly. Also, check to ensure the monitor cable is connected properly.
Repeating (endless loop) - Memory error - Check for improperly seated or missing memory.
1 long, 3 short - No video card or bad video RAM - Reseat or replace the video card.
High frequency beeeps while running - Overheated CPU - Check the CPU fan for proper operation. Check the case for proper air flow.
Repeating High/Low - Either the CPU is not seated properly or damaged. May also be due to excess heat. - Check the CPU fan or BIOS settings for proper fan speed.