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Intel® Server Board S3420GP TPS
Diagnostic LED Decoder
Checkpoint
Upper Nibble
MSB
8h
4h
2h
LED
#7
#6
#5
0x78h
X
O
O
0x79h
X
O
O
0x7Ah
X
O
O
Keyboard (only USB)
0x90h
O
X
X
0x91h
O
X
X
0x92h
O
X
X
0x93h
O
X
X
0x94h
O
X
X
0x95h
O
X
X
Mouse (only USB)
0x98h
O
X
X
0x99h
O
X
X
0x9Ah
O
X
X
0x9Bh
O
X
X
Fixed Media
0xB0h
O
X
O
0xB1h
O
X
O
0xB2h
O
X
O
0xB3h
O
X
O
Removable Media
0xB8h
O
X
O
0xB9h
O
X
O
0xBAh
O
X
O
0xBCh
O
X
O
Boot Device Selection (BDS)
0xD0
O
O
X
0xD1
O
O
X
0xD2
O
O
X
0xD3
O
O
X
0xD4
O
O
X
0xD5
O
O
X
0xD6
O
O
X
0xDF
O
O
X
Pre-EFI Initialization (PEI) Core
0xE0h
O
O
O
0xE1h
O
O
O
0xE2h
O
O
O
0xE3h
O
O
O
Driver eXecution Environment (DXE) Core
0xE4h
O
O
O
0xE5h
O
O
O
Revision 2.4
O = On, X=Off
Lower Nibble
LSB
1h
8h
4h
2h
1h
#4
#3
#2
#1
#0
O
O
X
X
X
O
O
X
X
O
O
O
X
O
X
O
X
X
X
X
O
X
X
X
O
O
X
X
O
X
O
X
X
O
O
O
X
O
X
X
O
X
O
X
O
O
X
X
O
X
O X
X
O
O
O
X
O
O
X
O
X
O
O
O
O
X
X
X
X
O
X
X
X
O
O
X
X
O
X
O
X
X
O
O
O
O
X
X
X
O
O
X
X
O
O
O
X
O
X
O
O
O
X
X
O
X
X
X
X
O
X
X
X
O
O
X
X
O
X
O
X
X
O
O
O
X
O
X
X
O
X
O
X
O
O
X
O
O
X
O
O
O
O
O
X
X
X
X
X
X
X
X
X
O
X
X
X
O
X
X
X
X
O
O
X
X
O
X
X
X
X
O
X
O
Intel order number E65697-010
Appendix C: POST Code Diagnostic LED Decoder
Resetting the console controller
Disabling the console controller
Enabling the console controller
Resetting the keyboard
Disabling the keyboard
Detecting the presence of the keyboard
Enabling the keyboard
Clearing keyboard input buffer
Reserved for keyboard
Resetting the mouse
Detecting the mouse
Detecting the presence of mouse
Enabling the mouse
Resetting fixed media device
Disabling fixed media device
Detecting presence of a fixed media device (SATA hard drive detection,
etc.)
Enabling/configuring a fixed media device
Resetting removable media device
Disabling removable media device
Detecting presence of a removable media device (SATA CDROM
detection, etc.)
Enabling/configuring a removable media device
Entered the Boot Device Selection phase (BDS)
Return to last good boot device
Setup boot device selection policy
Connect boot device controller
Attempt flash update boot mode
Transfer control to EFI boot
Trying to 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
Description
121
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