Intel®
Server System SR1625UR TPS
Appendix B: POST Code Diagnostic LED Decoder
Revision 1.5
Intel order number E47487-007
87
Checkpoint
Diagnostic LED Decoder
Description
O = On, X=Off
Upper Nibble
Lower Nibble
MSB
LSB
8h
4h
2h
1h
8h
4h
2h
1h
LED
#7 #6 #5 #4 #3 #2 #1 #0
etc.)
0xBCh
O
X
O
O
O
O
X
X
Enabling/configuring a removable media device
Boot Device Selection (BDS)
0xD0
O
O
X
O
X
X
X
X
Trying to boot device selection 0
0xD1
O
O
X
O
X
X
X
O
Trying to boot device selection 1
0xD2
O
O
X
O
X
X
O
X
Trying to boot device selection 2
0xD3
O
O
X
O
X
X
O
O
Trying to boot device selection 3
0xD4
O
O
X
O
X
O
X
X
Trying to boot device selection 4
0xD5
O
O
X
O
X
O
X
O
Trying to boot device selection 5
0xD6
O
O
X
O
X
O
O
X
Trying to boot device selection 6
0xD7
O
O
X
O
X
O
O
O
Trying to boot device selection 7
0xD8
O
O
X
O
O
X
X
X
Trying to boot device selection 8
0xD9
O
O
X
O
O
X
X
O
Trying to boot device selection 9
0xDA
O
O
X
O
O
X
O
X
Trying to boot device selection A
0xDB
O
O
X
O
O
X
O
O
Trying to boot device selection B
0xDC
O
O
X
O
O
O
X
X
Trying to boot device selection C
0xDD
O
O
X
O
O
O
X
O
Trying to boot device selection D
0xDE
O
O
X
O
O
O
O
X
Trying to boot device selection E
0xDF
O
O
X
O
O
O
O
O
Trying to boot device selection F
Pre-EFI Initialization (PEI) Core
0xE0h
O
O
O
X
X
X
X
X
Started dispatching early initialization modules (PEIM)
0xE1h
O
O
O
X
X
X
X
O
Reserved for initialization module use (PEIM)
0xE2h
O
O
O
X
X
X
O
X
Initial memory found, configured, and installed correctly
0xE3h
O
O
O
X
X
X
O
O
Reserved for initialization module use (PEIM)
Driver eXecution Environment (DXE) Core (not accompanied by a beep code)
0xE4h
O
O
O
X
X
O
X
X
Entered EFI driver execution phase (DXE)
0xE5h
O
O
O
X
X
O
X
O
Started dispatching drivers
0xE6h
O
O
O
X
X
O
O
X
Started connecting drivers
DXE Drivers
0xE7h
O
O
O
X
O
O
X
O
Waiting for user input
0xE8h
O
O
O
X
O
X
X
X
Checking password
0xE9h
O
O
O
X
O
X
X
O
Entering BIOS setup
0xEAh
O
O
O
X
O
X
O
X
Flash Update
0xEEh
O
O
O
X
O
O
O
X
Calling Int 19. One beep unless silent boot is enabled.
0xEFh
O
O
O
X
O
O
O
O
Unrecoverable boot failure
Runtime Phase/EFI Operating System Boot
0xF2h
O
O
O
O
X
X
O
X
Signal that the OS has switched to virtual memory mode
0xF4h
O
O
O
O
X
O
X
X
Entering Sleep state
0xF5h
O
O
O
O
X
O
X
O
Exiting Sleep state
0xF8h
O
O
O
O
O
X
X
X
OS has requested EFI to close boot services (ExitBootServices ( )
Has been called)
0xF9h
O
O
O
O
O
X
X
O
OS has switched to virtual address mode (SetVirtualAddressMap ( )
