The server CMODs have an internal test circuit, the DIMM and CPU Fault Remind Circuit. You can use the circuit to help you locate failed DIMMs and verify a failed CPU after you have removed the CMOD from the server. The circuit holds an electrical charge and is operational for 10 minutes after power has been removed from the server. This allows you enough time to remove the CMOD and use the circuit.
For information about how to use the circuit to identify failed components, see Replace a Failed DIMM and Remove a Heatsink and Processor (FRU).