Technical Reference 77
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.

Table 16. BIOS Recovery Beep Codes

Beeps Error message POST Progress Code Description
1 Recovery started Start recovery process.
2 Recovery boot error Flashing series of
POST codes:
E9h
EEh
EBh
ECh
EFh
Unable to boot to floppy, ATAPI,
or ATAPI CD-ROM. Recovery
process will retry.
Series of long
low-pitched single
beeps
Recovery failed EEh Unable to process valid BIOS
recovery images. BIOS already
passed control to operating
system and flash utility.
2 long high-pitched
beeps
Recovery complete EFh BIOS recovery succeeded, ready
for power-down, reboot.
Bootblock Error Beep Codes

Table 17. Bootblock Error Beep Codes

Beeps Error message Description
1 Refresh timer failure The memory refresh circuitry on the motherboard is faulty.
2 Parity error Parity can not be reset.
3 Base memory failure Base memory test failure. **See "3-Beep-Boot Block
Failure Error Code" table for additional error details.
4 System timer System timer is not operational.
5 Processor failure Processor failure detected..
6 Keyboard controller Gate A20 failure The keyboard controller may be bad. The BIOS cannot
switch to protected mode.
7 Processor exception interrupt error The CPU generated an exception interrupt.
8 Display memory read/write error The syste m video adapter is either missing or its memory
is faulty. This is not a fatal error.
9 ROM checksum error System BIOS ROM checksum error.
10 Shutdown register error Shutdown CMOS register read/write error detected.
11 Invalid BIOS General BIOS ROM error.