Dell PowerEdge R420 Systems Owner's Manual

Troubleshooting A Damaged System

CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product.

Turn off the system and attached peripherals, and disconnect the system from the electrical outlet.
Open the system.
Ensure that the following components are properly installed:
- Cooling shroud
- Expansion cards
- Power supply(s)
- Cooling fans
- Processor(s) and heat sink(s)
- Memory modules
- Hard-drive carriers
- Hard-drive backplane
Ensure that all cables are properly connected.
Close the system.
Run the system board tests in the system diagnostics.

If the tests fail, see Getting Help.