Appendix B: POST Code Diagnostic LED Decoder
Intel®
Server System SR1625UR TPS
86
Revision 1.5
Intel order number E47487-007
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
0x52h
X
O
X
O
X
X
O
X
Hot Plug PCI controller initialization
0x53h
X
O
X
O
X
X
O
O
Reserved for PCI bus
0x54h
X
O
X
O
X
O
X
X
Reserved for PCI bus
0x55h
X
O
X
O
X
O
X
O
Reserved for PCI bus
0x56h
X
O
X
O
X
O
O
X
Reserved for PCI bus
0x57h
X
O
X
O
X
O
O
O
Reserved for PCI bus
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
Reserved for ATA
SMBUS
0x5Ch
X
O
X
O
O
O
X
X
Resetting SMBUS
0x5Dh
X
O
X
O
O
O
X
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
Instructing keyboard controller to run Self Test (PS2 only)
Mouse (only USB)
0x98h
O
X
X
O
O
X
X
X
Resetting the mouse
0x99h
O
X
X
O
O
X
X
O
Detecting the mouse
0x9Ah
O
X
X
O
O
X
O
X
Detecting the presence of mouse
0x9Bh
O
X
X
O
O
X
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 (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 (CDROM detection,
