Dell POWER EDGE 2900 Hardware Owner's Manual page 134

16 Replace processor 1 with processor 2 or with a processor of the same capacity. See "Replacing a
Processor" on page 89.
17 Close the system. See "Closing the System" on page 53.
18 Run the appropriate online diagnostic test.
If the tests complete successfully, replace processor 1. See "Getting Help" on page 147.
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Troubleshooting Your System