IBM System x3750 M4

The following illustration shows the LEDs and connectors on the system board.
The following illustration shows the LEDs on the optional microprocessor and
memory expansion tray.
DIMMs
error LEDs
25-30
DIMMs
31-42
error LEDs
DIMMs
43-48
error LEDs
Microprocessor 4
error LED
Microprocessor 3
error LED
System board
error LED
Microprocessor
and memory
expansion board
error LED
Light path
power LED
Chapter 4. Troubleshooting 173