IBM LS20 - BladeCenter - 8850 Service Manual page 55

The following illustration shows the locations of the system board error LEDs.
SCSI 0 error
LED (CR51)
(future use)
SCSI 1 error
LED (CR53)
(future use)
The following illustration shows LEDs on the light path diagnostics panel on the
system board.
NMI
NMI error LED
MIS
Microprocessor mismatch error LED
SBRD
System-board error LED
TEMP
Over temperature error LED
Light path diagnostics LED
Light path diagnostics switch
Note which LEDs are lit on the system board and the light path diagnostics panel.
Using this information and the information in "Light path diagnostics LEDs" on page
42 can often provide enough information to diagnose the error.
BMC error LED (CR47)
(future use)
Light path diagnostics panel
Microprocessor 1 error
LED (CR54)
Microprocessor 2 error
LED (CR50)
DIMM 3 error LED (CR46)
DIMM 4 error LED (CR49)
DIMM 1 error LED (CR52)
DIMM 2 error LED (CR48)
41
Chapter 2. Diagnostics