EPUB_PRC_HB_CODE isolation procedure

The service processor detected a problem during the early boot process.

1. Update the system firmware image. Go to Getting fixes and update the system firmware with the most recent level of firmware. Then, reboot the system. Does the problem persist?

   If	Then
   Yes:	Continue with the next step.
   No:	This ends the procedure.

2. Use the ipmitool command to examine system event logs (SELs).
   • To list SELs by using an in-band network, use the following command:

     ipmitool sel elist

   • To list SELs remotely over the LAN, use the following command:

     ipmitool -I lanplus -U <username> -P <password> -H <BMC IP addres or BMC hostname> sel elist

3. Identify all SELs with the value OEM record df and Correctable Machine Check Error or Transition to Non-recoverable in the description. Did you find one or more SELs with the value OEM record df and Correctable Machine Check Error or Transition to Non-recoverable in the description?

   If	Then
   Yes:	Continue with the next step.
   No:	Go to Contacting IBM service and support. This ends the procedure.

4. Is your system an 8335-GCA, 8335-GTA, or 8335-GTB?

   If	Then
   Yes:	Continue with the next step.
   No:	Continue with step 6.

5. For each of the SELs that you identified in step 3, determine the sensor name that is associated with each SEL. Replace the following items, one at a time, until the problem is resolved:
   Note: If your system is an 8335-GCA or 8335-GTA, go to 8335-GCA and 8335-GTA locations to identify the physical location and removal and replacement procedure. If your system is an 8335-GTB, go to 8335-GTB locations to identify the physical location and removal and replacement procedure.
   • If the sensor name is CPU Func 1 or CPU Core Func x, where x is 1 - 12, replace system processor CPU 1.
   • If the sensor name is CPU Func 2 or CPU Core Func x, where x is 13 - 24, replace system processor CPU 2.

   Does the problem persist?

   If	Then
   Yes:	Replace the system backplane. If the replacement of the system backplane does not resolve the problem, go to Contacting IBM service and support. This ends the procedure.
   No:	This ends the procedure.

6. The system is an 8348-21C. For each of the SELs that you identified in step 3, are any of the sensor names CPU Func or CPU Core Func x, where x is 1 - 12?
   Note: Go to 8348-21C locations to identify the physical location and removal and replacement procedure.

   If	Then
   Yes:	Replace the system processor. Then, continue with the next step.
   No:	Replace the system backplane. If the replacement of the system backplane does not resolve the problem, go to Contacting IBM service and support. This ends the procedure.

7. Does the problem persist?

   If	Then
   Yes:	Replace the system backplane. If the replacement of the system backplane does not resolve the problem, go to Contacting IBM service and support. This ends the procedure.
   No:	This ends the procedure.