Troubleshooting Your System 15720 Reconnect the system to its electrical outlet, and turn on the system andattached peripherals.21 As the system boots, observe any error message that appears and thediagnostic indicators on the front of the system.22 If the memory problem is still indicated, repeat step 15 through step 21 foreach memory module installed.If the problem persists after all memory modules have been checked,see "Getting Help" on page 177.Troubleshooting an Internal USB KeyCAUTION: 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.1 Enter the System Setup program and ensure that the SD card port isenabled. See "Integrated Devices Screen" on page 64.2 Turn off the system and attached peripherals, and disconnect the systemfrom the electrical outlet.3 Open the system. See "Opening the System" on page 854 Locate the USB key and reseat it. See "Chassis Intrusion Switch" onpage 134.5 Close the system. See "Closing the System" on page 86.6 Turn on the system and attached peripherals and check if the USB key isfunctioning.7 If the problem is not resolved, repeat step 2 and step 3.8 Insert a different USB key that you know works properly.9 Close the system. See "Closing the System" on page 86.
