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IntelP®P Server Board S3420GP TPS Appendix C: POST Code Diagnostic LED Decoder
Diagnostic LED Decoder
O = On, X=Off
Upper Nibble Lower Nibble
MSB LSB
Checkpoint
8h 4h 2h 1h 8h 4h 2h 1h
LED #7 #6 #5 #4 #3 #2 #1 #0
Description
0x93h O X X O X X O O Enabling the keyboard
0x94h O X X O X O X X Clearing keyboard input buffer
0x95h O X X O X O X O Reserved for keyboard
Mouse (only USB)
0x98h O X X O X X O X
Resetting the mouse
0x99h O X X O X X O O
Detecting the mouse
0x9Ah O X X O X O O X
Detecting the presence of mouse
0x9Bh O X X O X O O O
Enabling the mouse
Fixed Media
0xB0h O X O O X X X X
Resetting fixed media device
0xB1h O X O O X X X O
Disabling fixed media device
0xB2h O X O O X X O X
Detecting presence of a fixed media device (SATA hard drive detection,
etc.)
0xB3h O X O O X X O O
Enabling / configuring a fixed media device
Removable Media
0xB8h O X O O O X X X Resetting removable media device
0xB9h O X O O O X X O Disabling removable media device
0xBAh O X O O O X O X
Detecting presence of a removable media device (SATA CDROM
detection, 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 Entered the Boot Device Selection phase (BDS)
0xD1 O O X O X X X O Return to last good boot device
0xD2 O O X O X X O X Setup boot device selection policy
0xD3 O O X O X X O O Connect boot device controller
0xD4 O O X O X O X X Attempt flash update boot mode
0xD5
O O X O
X O X O
Transfer control to EFI boot
0xD6
O O X O
X O O X Trying to boot device selection
0xDF O O X O O O O O Reserved for boot device selection
Pre-EFI Initialization (PEI) Core
0xE0h O O O X X X X X Entered Pre-EFI Initialization phase (PEI)
0xE1h O O O X X X X O Started dispatching early initialization modules (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 Transfer control to the DXE Core
Driver eXecution Environment (DXE) Core
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 O X X Flash Update
0xEEh O O O X O O X X Calling Int 19. One beep unless silent boot is enabled.
0xEFh O O O X O O X O Unrecoverable boot failure
Revision 1.0
Intel order number E65697-003
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