258-Unsupported Processor Configuration Detected

Symptom

258-Unsupported Processor Configuration Detected. This system supports either 2 processor or 4 processor configurations and is currently configured with <1 or 3> processor(s). Action: Install either 2 or 4 processors.

Cause

An incorrect number of processors are installed.

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: