Specifications

Appendix C: POST Code Diagnostic LED Decoder Intel® Server Board S3420GPRX TPS
Revision 1.1
Intel order number E92065-001
126
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
USB
0x58h X O X O O X X X
Resetting USB bus
0x59h
X O X O O X X O
Reserved for USB devices
ATA/ATAPI/SATA
0x5Ah X O X O
O X O X
Resetting SATA bus and all devices
0x5Bh X O X O O X O O
Detecting the presence of ATA device
0x5Ch X O X O O O X X
Enable SMART if supported by ATA device
0x5Dh
X O X O O O X O
Reserved for ATA
SMBUS
0x5Eh X O X O O O O X
Resetting SMBUS
0x5Fh X O X O O O O O
Reserved for SMBUS
Local Console
0x70h X O O O X X X X
Resetting the video controller (VGA)
0x71h
X O O O
X X X O Disabling the video controller (VGA)
0x72h
X O O O
X X O X Enabling the video controller (VGA)
Remote Console
0x78h X O O O O X X X
Resetting the console controller
0x79h
X O O O
O X X O Disabling the console controller
0x7Ah X O O O O X O X Enabling the console controller
Keyboard (only USB)
0x90h O X X O X X X X Resetting the keyboard
0x91h O X X O X X X O Disabling the keyboard
0x92h
O X X O X X O X
Detecting the presence of the keyboard
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.)