Troubleshooting Your System 1576 If the problem is not resolved, turn off the system and install a new fan.See "Removing a Cooling Fan" on page 117 and "Installing a Cooling Fan"on page 119.7 Restart the system.If the replacement fan is working properly, close the system. See "Closingthe System" on page 83.If the replacement fan does not operate, see "Getting Help" on page 181.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 isnot covered by your warranty. Read and follow the safety instructions thatcame with the product.NOTE: Invalid memory configurations can cause your system to halt at startupwithout video output. See "General Memory Module Installation Guidelines" onpage 122 and verify that your memory configuration complies with all applicableguidelines.1 If the system is operational, run the appropriate online diagnostic test.See "Running the System Diagnostics" on page 169.If diagnostics indicates a fault, follow the corrective actions provided bythe diagnostic program.2 If the system is not operational, turn off the system, including anyattached peripherals, and disconnect the system from its electrical outlet.Wait at least 10 seconds, and then reconnect the system to power.3 Turn on the system and attached peripherals and note the messages on thescreen.Go to step 18 if an error message appears indicating a fault with a specificmemory module.
