Appendix C: POST Error Messages and Handling
Revision 1.3
Intel order number E44588-003
51
Error Code
Error Message
Response
9506
ATA/ATPI component encountered a controller error.
Minor
95A6
PCI component encountered a controller error.
Minor
95A7
PCI component encountered a read error.
Minor
95A8
PCI component encountered a write error.
Minor
9609
Unspecified software component encountered a start error.
Minor
9641
PEI Core component encountered a load error.
Minor
9667
PEI module component encountered a illegal software state error.
Fatal
9687
DXE core component encountered a illegal software state error.
Fatal
96A7
DXE boot services driver component encountered a illegal software state error.
Fatal
96AB
DXE boot services driver component encountered invalid configuration. Minor
96E7
SMM driver component encountered a illegal software state error.
Fatal
0xA022
Processor component encountered a mismatch error.
Major
0xA027
Processor component encountered a low voltage error.
Minor
0xA028
Processor component encountered a high voltage error.
Minor
0xA421
PCI component encountered a SERR error.
Fatal
0xA500
ATA/ATPI ATA bus SMART not supported.
Minor
0xA501
ATA/ATPI ATA SMART is disabled.
Minor
0xA5A0
PCI Express component encountered a PERR error.
Minor
0xA5A1
PCI Express component encountered a SERR error.
Fatal
0xA5A4
PCI Express IBIST error.
Major
0xA6A0
DXE boot services driver Not enough memory available to shadow a legacy option ROM.
Minor
0xB6A3
DXE boot services driver Unrecognized.
Major
The following table lists POST error beep codes. Prior to system video initialization, the BIOS
uses these beep codes to inform users of error conditions. The beep code is followed by a user-
visible code on POST Progress LEDs.
Table 29. POST Error Beep Codes
Beeps
Error Message
POST Progress
Code
Description
3
Memory error
Multiple
System halted because a fatal error related to the
memory was detected.
The following Beep Codes are from the BMC, and are controlled by the Firmware team. They are listed here
for convenience.
1-5-2-1
CPU: Empty slot /
population error.
N/A
CPU sockets are populated incorrectly – CPU1 must be
populated before CPU2.
1-5-4-2
Power fault: DC
power
unexpectedly lost
(power good
dropout)
N/A
Power unit sensors – power unit failure offset.
1-5-4-4
Power control fault
(Power good
assertion timeout)
N/A
Power unit sensors – soft power control failure offset.