MEM LED lights up

The MEM LED on the light path diagnostics panel lights up when a memory configuration is invalid or a memory error occurs (both the MEM LED and CNFG LED might light up).

Troubleshooting steps when both MEM LED and CNFG LED light up

Procedure

Make sure that the DIMM configuration is supported.
Replace the DIMMs with a supported configuration.

Troubleshooting steps when only MEM LED lights up

Procedure

If the server did not boot and a failing DIMM LED lights up:
1. If you have a monitor, check for a PFA log event in the system event log .
2. Reseat the DIMM.
3. If the problem still exists, move the DIMM to a different slot.
4. Look at the DIMM LEDs on the system board:
  - If the DIMM LED that corresponds to the new DIMM socket lights up, replace the DIMM.
  - If the DIMM LED that corresponds to the original DIMM socket lights up, replace the server.
If the server booted, the failing DIMM is disabled, and the DIMM LED lights up:
1. If the LEDs light up by two DIMMs and you have a monitor, check the system event log for a PFA event for one of the DIMMs, and then replace that DIMM. Otherwise, replace both DIMMs
2. If the LED lights up by only one DIMM, replace that DIMM.