Bios Post Beep Codes - Acer Altos G520 series User Manual

BIOS POST Beep Codes

The table below lists the POST error beep codes. Prior to system video
initialization, the BIOS uses these beep codes to inform users of error
conditions. The beep code occurs only when a critical error occurs or
when the BIOS fails to boot to the operating system. Please note that
not all error conditions are supported by BIOS beep codes.
Number of Beeps
1
2
3
4
5
6
7
8
9
10
11
Description
Refresh failure
Parity cannot be reset
First 64 Kb memory failure
Timer not operational
Processor failure (Reserved; not used)
8042 GateA20 cannot be toggled (memory failure or
not present)
Exception interrupt error
Display memory R/W error
(Reserved; not used)
CMOS Shutdown register test error
Invalid BIOS (such as, POST module not found)
117