242-Unsupported Processor Configuration Detected

Symptom

242-Unsupported Processor Configuration Detected - System does not support booting with three processors installed. Action: Install an additional processor or remove one processor.

– System Halted!

Cause

The system does not support booting with three processors.

CAUTION: Before removing or replacing any processors, be sure to follow the processor troubleshooting guidelines in "Performing Processor Procedures in the Troubleshooting Process" in the HPE ProLiant Gen9 Troubleshooting Guide, Volume I: Troubleshooting. Failure to follow the recommended guidelines can cause damage to the system board, requiring replacement of the system board.
Action
Do one of the following: