Troubleshooting
Troubleshooting a Failed Processor
The AMD HyperTransport link architecture links multiple processors. When a processor
failure occurs, the root cause of the problem can be either a failed HyperTransport link or a
failed processor.
A failed processor or failed HyperTransport link causes the system to hang at POST without
video.
Perform the steps outlined in the following sections to isolate a failed component in a 2 or
4-processor memory board configuration.
Two-Processor Memory Board Configuration
In a 2-processor memory board configuration, processor memory boards are installed in slot 1
and slot 2. Since the system does not boot with only one processor board, one or two extra,
known-good boards (along with processors) may be required to troubleshoot.
IMPORTANT: Be sure that the processor memory board in slot 2 has DIMMs installed. For more
information on memory population guidelines, refer to the “Memory Options” section in Chapter 2.
1. Reseat both processor memory boards and power up the server. If this does not resolve
the problem, proceed to the next step.
2. Replace the processor memory board in slot 2 with a known good board and power up the
server.
3. If this does not resolve the problem, replace the processor memory board in slot 2 with
the original processor board and replace the processor board in slot 1 with the known
good processor board.
4. If this does not resolve the problem, replace the original processor boards in slot 1 and
slot 2 with two known good processor boards. If the system still fails to boot, replace the
system board.
HP ProLiant DL585 Server Maintenance and Service Guide 5-11
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