Dell PowerEdge SC 420 - Manual (Page 44)

1. Run the appropriate online diagnostics test. See " Using Server Administrator Diagnostics " in "Running the System Diagnostics."
2. Turn off the system and attached peripherals, and disconnect the system from the electrical outlet.
3. Open the system. See " Opening the System ."
4. Ensure that the processor and heat sink are properly installed. See " Processor " in "Installing System Options."
5. Close the system. See " Closing the System ."
6. Reconnect the system to the electrical outlet, and turn on the system and attached peripherals.
If the problem persists, see " Getting Help ."
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NOTICE: Use caution when removing and installing the processor. Bending or damaging the processor socket pins or dropping any type of foreign
material into the processor slot will permanently damage the system board.