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Error Message
<CTRL_N> Pressed
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
BIOS Recovery Beep Codes
Beeps
1
1-2
An error or warning condition at boot can result in a series of beeps being issued known as "beep
codes." These beeps have a code that identifies system or PCI card events. For example, some Acer RAID
cards have beep codes. Before checking for a system beep code error make sure the PCI card is not causing
the beeping.
Chapter 4
CMOS is ignored and NVRAM is cleared. User must enter Setup
Description
Refresh failure
Parity cannot be reset
First 64 Kb memory failure
Timer not operational
Processor failure (Reserved; not used)
8042 GateA20 cannot be
Exception interrupt error
Display memory R/W error
(Reserved; not used)
CMOS Shutdown register test error
Invalid BIOS (such as, POST module not found)
One long beep - video is active.
One long beep and two short beeps: Insert the BIOS recovery
diskette.
Explanation
Reason
72
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