Identify and Remove a Failed DIMM

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This is a cold-service procedure that can be performed by a customer. Power down the server completely before performing this procedure.

Gain access to the DIMMs by preparing the server for service and removing the top cover.
See Preparing for Service.
Remove the air baffle by lifting it straight up and out of the system.
Identify and note the location of the failed DDR4 DIMM by pressing the Fault Remind button on the motherboard.
Failed DDR4 DIMMs display an amber LED on the motherboard.
To remove the failed DIMM, rotate both DIMM socket ejectors outward as far as they will go, then carefully lift the DIMM straight up to remove it from the socket.
Replace each failed DIMM with either another DIMM of the same rank size (quad-rank, dual-rank, or single-rank) or leave the socket empty.