HP ProLiant Gen8 Troubleshooting Guide Volume I: Troubleshooting

Hardware problems 55
3.
Be sure a memory count error did not occur ("Memory count error exists" on page 54). See the message
displaying memory count during POST.
4. Be sure the server supports the number of processor cores. Some server models only support 32 cores
and this may reduce the amount of memory that is visible.
Server fails to recognize new memory
Action:
1. Be sure the memory is the correct type for the server and is installed according to the server
requirements. See the server documentation or HP website (http://www.hp.com).
2. Be sure you have not exceeded the memory limits of the server or operating system. See the server
documentation.
3. Be sure the server supports the number of processor cores. Some server models only support 32 cores
and this may reduce the amount of memory that is visible.
4. Be sure no Event List error messages are displayed in the IML ("Integrated Management Log" on page
72).
5. Be sure the memory is seated properly ("DIMM handling guidelines" on page 18).
6. Be sure no conflicts are occurring with existing memory. Run the server setup utility.
7. Test the memory by installing the memory into a known working server. Be sure the memory meets the
requirements of the new server on which you are testing the memory.
8. Replace the memory. See the server documentation.
Processor problems
Action:
1. Be sure each processor is supported by the server and is installed as directed in the server
documentation. The processor socket requires very specific installation steps and only supported
processors should be installed. For processor requirements, see the server documentation.
2. Be sure the server ROM is current.
If an "unsupported processor detected" message appears, see "Unsupported processor stepping with
Intel processors (on page 56)."
3. Be sure you are not mixing processor stepping, core speeds, or cache sizes if this is not supported on
the server. For more information, see the server documentation.
CAUTION: Removal of some processors and heatsinks require special considerations for
replacement, while other processors and heatsinks are integrated and cannot be reused once
separated. For specific instructions for the server you are troubleshooting, refer to processor
information in the server user guide.
CAUTION: Before removing or replacing any processors, be sure to follow the guidelines
provided in "Performing processor procedures in the troubleshooting process (on page 15)."
Failure to follow the recommended guidelines can cause damage to the system board, requiring
replacement of the system board.
4. If the server has only one processor installed, reseat the processor. If the problem is resolved after you
restart the server, the processor was not installed properly.