2 Beeps: Parity circuit failure
3 Beeps: Base 64K RAM failure
4 Beeps: System timer failure
5 Beeps: Processor failure
6 Beeps: Keyboard controller / gate A20 failure
7 Beeps: Virtual mode exception error
8 Beeps: Display memory read/write failure
9 Beeps: ROM BIOS checksum failure
10 Beeps: CMOS shutdown register read/write error
11 Beeps: Cache memory error
Continuous Beeping: Memory or video problem
Other Beep Codes