IBM X3950 X5 Problem Determination And Service Manual page 77

The following illustration shows the LEDs on a memory card.
Note: You can view the LED on top of the memory card while the card is in
the server. When you remove the memory card from the server, you must press
the light path diagnostics button on the card to relight the LEDs to identify the
error.
Light path
diagnostics
button
Light path
diagnostics
button
power LED
DIMM 1
DIMM 2
DIMM 3
DIMM 4
DIMM 5
DIMM 6
DIMM 7
DIMM 8
Memory
card/DIMM
error LED
Memory
card only
error LED
DIMM 1 error LED
DIMM 2 error LED
DIMM 3 error LED
DIMM 4 error LED
DIMM 5 error LED
DIMM 6 error LED
DIMM 7 error LED
DIMM 8 error LED
61
Chapter 3. Diagnostics