Troubleshooting Your System 1555 Restart the system.If the fan functions properly, close the system. See "Closing the System" onpage 86.6 If the fan does not function, turn off the system and install a new fan.See "Removing the System Fan" on page 106 and "Installing the SystemFan" on page 107.7 Restart the system.If the problem is resolved, close the system. See "Closing the System" onpage 86.If the replacement fan does not operate, see "Getting Help" on page 177.Troubleshooting System MemoryCAUTION: 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.NOTE: Invalid memory configurations can cause your system to halt at startupwithout video output. See "General Memory Module Installation Guidelines" onpage 108 and verify that your memory configuration complies with all applicableguidelines.1 If the system is operational, run the appropriate online diagnostic test.See "Using Online Diagnostics" on page 165.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 atleast 10 seconds and then reconnect the system to power.3 Turn on the system and attached peripherals and note the messageson the screen.Go to step 15 if an error message appears indicating a fault with a specificmemory module.
