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BIOS Recovery Beep Codes
In the case of a Bootblock update, where video is not available for text messages to be displayed, speaker
beeps are necessary to inform the user of any errors. The following table describes the type of error beep
codes that may occur during the Bootblock update.
BIOS Recovery Beep Codes
Beeps
1
Recovery started
2
Recovery boot error
Series of long
Recovery failed
low-pitched
single beeps
2 long high-
Recovery complete
pitched beeps
Recovery BIOS will generate two beeps and flash POST code sequence of 0E9h, 0EAh, 0EBh, 0ECh, and
0EFh on the POST Progress Code LEDs.
During recovery mode, video will not be initialized. One high-pitched beep announces the start of the
recovery process. The entire process takes two to four minutes. A successful update ends with
high-pitched beeps. Failure is indicated by a long series of short beeps.
Bootblock Error Beep Codes
Bootblock Error Beep Codes
Beeps
Error message
1
Refresh timer failure
2
Parity error
3
Base memory failure
4
System timer
5
Processor failure
6
Keyboard controller Gate
A20 failure
7
Processor exception
interrupt error
8
Display memory read/
write error
9
ROM checksum error
10
Shutdown register error
11
Invalid BIOS
75
Error message
Flashing series of POST
codes:
E9h
EEh
EBh
ECh
EFh
EEh
EFh
The memory refresh circuitry on the mainboard is faulty.
Parity can not be reset
Base memory test failure.
System timer is not operational
Processor failure detected
The keyboard controller may be bad. The BIOS cannot switch to
protected mode.
The CPU generated an exception interrupt.
The system video adapter is either missing or its memory is faulty.
This is not a fatal error.
System BIOS ROM checksum error
Shutdown CMOS register read/write error detected
General BIOS ROM error
POST Progress Code
Description
Description
Start recovery process
Unable to boot to floppy, ATAPI, or
ATAPI CD-ROM. Recovery
process will retry.
Unable to process valid BIOS
recovery images. BIOS already
passed control to operating
system and flash utility.
BIOS recovery succeeded, ready
for power-down, reboot.
Chapter 4
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