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Checkpoint
MSB
8h
LED
#7
0xD4
1
0xD5
1
0xD6
1
0xDF
1
Pre-EFI Initialization (PEI) Core
0xE0h
1
0xE1h
1
0xE2h
1
0xE3h
1
Driver Execution Environment (DXE) Core
0xE4h
1
0xE5h
1
0xE6h
1
DXE Drivers
0xE7h
1
0xE8h
1
0xE9h
1
0xEAh
1
®
Intel
Server System SR1695GPRX Service Guide
Table 14. Diagnostic LED POST Code Decoder
Diagnostic LED Decoder
1 = On, 0= Off
Upper Nibble
4h
2h
1h
#6
#5
#4
1
0
1
1
0
1
1
0
1
1
0
1
1
1
0
1
1
0
1
1
0
1
1
0
1
1
0
1
1
0
1
1
0
1
1
0
1
1
0
1
1
0
1
1
0
Lower Nibble
LSB
8h
4h
2h
#3
#2
#1
0
1
0
0
0
1
0
1
0
1
1
0
1
1
1
1
0
0
0
0
0
0
0
1
0
0
1
0
0
0
1
1
0
1
0
0
0
1
0
1
0
1
1
0
1
1
0
1
1
0
0
0
1
0
0
1
1
1
0
0
Description
1h
#0
Attempt flash update boot
mode
Transfer control to EFI
boot
Trying boot device
selection
Reserved for boot device
selection
Entered Pre-EFI
Initialization phase (PEI)
Started dispatching early
initialization modules
(PEIM)
Initial memory found,
configured, and installed
correctly
Transfer control to the
DXE Core
Entered EFI driver
execution phase (DXE)
Started dispatching
drivers
Started connecting drivers
Waiting for user input
Checking password
Entering BIOS setup
Flash Update
149
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