Dell POWEREDGE R610 - Manual (Page 158)

158 Troubleshooting Your System
12 Reconnect the system to the electrical outlet, and turn on the system and
attached peripherals.
13 Run the appropriate online diagnostic test.
If the test fails, the processor is faulty. See "Getting Help."
14 Turn off the system and attached peripherals, and disconnect the system
from the electrical outlet.
15 Open the system. See "Closing the System."
16 Replace the processor with the processor you removed in step 10. See
"Installing a Processor."
17 Repeat step 11 through step 13.
If the problem persists, the system board is faulty. See "Getting Help."