190 Troubleshooting Your System14 For each expansion card you removed in step 10, perform the followingsteps:a Turn off the system and attached peripherals, and disconnect thesystem from the electrical outlet.b Open the system. See "Opening the System" on page 89.c Reinstall one of the expansion cards.d Close the system. See "Closing the System" on page 90.e Run the appropriate diagnostic test.If the tests fail, see "Getting Help" on page 203.Troubleshooting the ProcessorsCAUTION: Many repairs may only be done by a certified service technician.You should only perform troubleshooting and simple repairs as authorized inyour product documentation, or as directed by the online or telephone serviceand support team. Damage due to servicing that is not authorized by Dell is notcovered by your warranty. Read and follow the safety instructions that camewith the product.1 Run the appropriate online diagnostics test. See "Using OnlineDiagnostics" on page 193.2 Turn off the system and attached peripherals, and disconnect the systemfrom the electrical outlet.3 Open the system. See "Opening the System" on page 89.4 Remove the memory risers. See "Removing a Memory Riser" on page 100.5 Remove the cooling fan assembly. See "Removing the Cooling FanAssembly" on page 118.6 Ensure that each processor and heat sink are properly installed. See"Removing a Processor" on page 148.7 Install the cooling fan assembly. See "Installing the Cooling Fan Assembly"on page 120.8 Install the memory risers. See "Installing a Memory Riser" on page 101.9 Close the system. See "Closing the System" on page 90.10 Reconnect the system to the electrical outlet, and turn on the system andattached peripherals.
