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Gigabyte is using Award BIOS/UEFI
When CPU is dead then is no sound at all ( on diagnostic display is or 00 or it's not working at all ). When CPU is fine then board is always making some beeps and Robert17 already made a list of codes.
What does BIOS beep sound mean?
1.AWARD BIOS:
1 short beep ：System normal
2 short beep ：CMOS Error
1 long beep and 1 short beep：Memory error
1 long beep and 2 short beep：Graphic card error
1 long beep and 3 short beep ：AGP error
1 long beep and 9 short beep ：Memory Error Continuous long beep ：Memory not correctly installed Continuous short beep ：Power supply unit failed
2.AMI BIOS:
1 short beep ：Memory Error
2 short beep：Memory parity check error.
3 short beep ：basic memory 64K address check error
4 short beep ：Real Time Clock malfunction.
5 short beep ：CPU error 6 short beep：Keyboard error
7 short beep ：CPU interruption error 8 short beep：Graphic card error
9 short beep ：Memory error
10 short beep ：CMOS error
11 short beep ：CPU cache memory malfunction
AMI BIOS FATAL ERROR BEEP CODES
1 beep – Refresh failure.- (DRAM-Memory Error)
2 beeps – Parity error. - (Memory parity check error-circuit failure)
3 beeps – Base 64 K memory failure. - (Basic memory 64K address check error)
4 beeps – Timer not operational. - (Real Time Clock=System timer failure)
5 beeps – Processor error.
6 beeps – 8042 – Keyboard controller gate A20 failure.
7 beeps – Processor exception interrupt error. - (Virtual mode exception error)
8 beeps – Display (Graphic card) memory read/write test failure.
9 beeps – ROM checksum error.
10 beeps – CMOS shutdown register read/write error.
11 beeps – CPU Cache memory bad. - (malfunction-error - The L2 cache is faulty)
Continuous long beep ：Memory not correctly installed - Memory bank is broken or not plugged well
Continuous short beep ：Power supply unit failed