104 Troubleshooting Your System1 Locate the faulty fan indicated by the diagnostic software.2 Turn off the system and all attached peripherals.3 Open the system. See "Opening the System" on page 50.4 Reseat the fan's power cable.5 Restart the system.If the fan functions properly, close the system. See "Closing the System" onpage 51.6 If the fan does not function, turn off the system and install a new fan.See "Cooling Fans" on page 74.7 Restart the system.If the problem is resolved, close the system. See "Closing the System" onpage 51.If the replacement fan does not operate, see "Getting Help" on page 119.Troubleshooting System MemoryCAUTION: 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.NOTE: Invalid memory configurations can cause your system to halt at startupwithout video output. See General Memory Module Installation Guidelines andverify that your memory configuration complies with all applicable guidelines.1 If the system is operational, run the appropriate online diagnostic test.See "Running the System Diagnostics" on page 111.If diagnostics indicates a fault, follow the corrective actions provided bythe diagnostic program.2 If the system is not operational, turn off the system and attachedperipherals, and unplug the system from the power source. Wait at least 10seconds and then reconnect the system to power.3 Turn on the system and attached peripherals and note the messages on thescreen.
