Troubleshooting Your System 165Troubleshooting 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 105 and verify that your memory configuration complies with allapplicable guidelines.1 If the system is operational, run the appropriate online diagnostic test.See "Using Online Diagnostics" on page 177.If diagnostics indicates a fault, follow the corrective actions providedby the 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 least10 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 14 if an error message appears indicating a fault with aspecific memory module.4 Enter the System Setup program and check the system memory setting.See "Memory Settings Screen" on page 61. Make any changes to thememory settings, if needed.If the memory settings match the installed memory but a problem is stillindicated, go to step 14.5 Turn off the system and attached peripherals, and disconnect the systemfrom the electrical outlet.6 Open the system. See "Opening the System" on page 83.7 Remove the cooling shroud. See "Removing the Cooling Shroud" onpage 86.8 Check the memory channels and ensure that they are populated correctly.See "General Memory Module Installation Guidelines" on page 105.
