My R410 is rebooting intermittently. It does this even when in diagnostic mode running MpMemory test.

I get this error when going into diagnostic:
Message PR1: Replaced part detected for device: DDR3 DIMM(Socket A1)

I have changed the dimm for A1. I have also unplugged the power & hold down the power button for 30 seconds before starting normally. Both did not resolve the issue.

Is there anything else I can do?

If indeed A1 is faulty, what are my options?

The server have 2 CPUs, 8x8GB dimm.