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Beep codes 95
If POST completes normally, the BIOS issues one short beep before passing
control to the operating system.
Short Beeps Description
1 Refresh failure
2 Parity cannot be reset
3 First 64 KB memory failure
4 Timer not operational
5 Not used
6 8042 GateA20 cannot be toggled
7 Exception interrupt error
8 Display memory R/W error
9 Not used
10 CMOS shutdown register test error
11 Invalid BIOS (for example, POST module not found)