Troubleshooting Your System 1095 Reinstall the components you removed in step 3.6 Close the system. See "Closing the System" on page 58.7 Turn on the system and attached peripherals.If the system does not start properly, see "Getting Help" on page 129.8 If the system starts properly, shut down the system and reinstall all of theexpansion cards that you removed. See "Installing an Expansion Card" onpage 78.9 Run the appropriate online diagnostic test. See "Using Online Diagnostics"on page 121.If the tests fail, see "Getting Help" on page 129.Troubleshooting a Damaged SystemCAUTION: Many repairs may only be done by a certified service technician. Youshould only perform troubleshooting and simple repairs as authorized in yourproduct documentation, or as directed by the online or telephone service andsupport team. Damage due to servicing that is not authorized by Dell is not coveredby your warranty. Read and follow the safety instructions that came with theproduct.1 Turn off the system and attached peripherals, and disconnect the systemfrom the electrical outlet.2 Open the system. See "Opening the System" on page 57.3 Ensure that the following components are properly installed:• Cooling shroud and expansion card stabilizer• Expansion cards• Power supply• Cooling fan• Processor and heat sink• Memory modules• Hard-drive carriers4 Ensure that all cables are properly connected.5 Close the system. See "Closing the System" on page 58.