160 Troubleshooting Your System13 Run the appropriate online diagnostic test. See "Running the SystemDiagnostics" on page 163.If the tests fail, see "Getting Help" on page 167.14 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 82.c Reinstall one of the expansion cards.d Close the system. See "Closing the System" on page 83.e Run the appropriate diagnostic test.If the tests fail, see "Getting Help" on page 167.Troubleshooting the MicroprocessorsWARNING: Only trained service technicians are authorized to remove the systemcover and access any of the components inside the system. Before you begin thisprocedure, review the safety instructions that came with the system.1 Run the appropriate online diagnostics test. See "Using Dell™Diagnostics" on page 163.2 Turn off the system and attached peripherals, and disconnect the systemfrom the electrical outlet.3 Open the system. See "Opening the System" on page 82.4 Ensure that each processor and heat sink are properly installed. See""Installing a Processor" on page 129."5 Close the system. See "Closing the System" on page 83.6 Reconnect the system to the electrical outlet, and turn on the system andattached peripherals.7 Run the appropriate online diagnostic test. See "Running the SystemDiagnostics" on page 163.If your system only has one processor and a problem is still indicated, see"Getting Help" on page 167.
