Beep Code

How to detect error with beep ?????

AST BIOS

• One short --> CPU register test failure
• Two short --> Keyboard controller buffer failure
• Three short --> Keyboard controller reset failure
• Four short --> Keyboard communication failure
• Five short --> Keyboard input failure
• Six short --> System board chipset failure
• Nine short --> BIOS ROM checksum error
• Ten short --> System timer test failure
• Eleven short --> ASIC failure
• Twelve short --> CMOS RAM shutdown register failure
• One long --> DMA controller 0 failure
• One long, one short --> DMA controller 1 failure
• One long, two short --> Video vertical retrace failure
• One long, three short --> Video memory test failure
• One long, four short --> Video adapter failure
• One long, five short --> 64KB memory failure
• One long, six short --> Unable to load interrupt vectors
• One long, seven short --> Unable to initialize video
• One long, eight short --> Video memory failure

IBM BIOS

• Two short --> Initialization error
• One long, one short --> System board error
• One long, two short --> Video adapter error
• One long, three short --> EGA/VGA adapter error
• Three long --> keyboard adapter error
• Continuous --> Power supply error
• No beep --> Power supply

Award Bios

• One long, two short --> Video adapter error
• Repeating (endless loop) --> Memory error
• One long, three short --> No video card or bad video RAM
• High frequency beeeps while running --> Overheated CPU
• Repeating High/Low --> Either the CPU is not seated properly or the CPU is damaged