Models 590 or 595

1. Use FRUs that were previously specified to determine if the system processors are on separate nodes. Are the system processors on separate nodes?
   • No: Continue with step 2.
   • Yes: Do the following:
     1. Power off the system (see Powering on and powering off).
     2. Replace the bad node backplane or backplanes by using NODEPL.
     3. Perform a slow boot.
     4. Is the problem resolved?
        • Yes: This ends the procedure.
        • No: Replace the bad node backplane or backplanes by using SYSBKPL. This ends the procedure.
2. Power off the system (see Powering on and powering off).
3. Replace the bad node backplane or backplanes by using NODEPL.
4. . This ends the procedure.