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)

 

 

Beep codes

95