152 Troubleshooting Your System14 If a diagnostic test or error message indicates a specific memory module asfaulty, swap or replace the module. Otherwise, swap the memory modulein the first DIMM socket with a module of the same type and capacity thatis known to be good. See "Installing Memory Modules" on page 117.15 Close the system. See "Closing the System" on page 71.16 Reconnect the system to its electrical outlet, and turn on the system andattached peripherals.17 As the system boots, observe any error message that appears and thediagnostic indicators on the front of the system.18 If the memory problem is still indicated, repeat step 12 through step 17 foreach memory module installed.If the problem persists after all memory modules have been checked, see"Getting Help" on page 175.Troubleshooting an SD Card or Internal USB KeyProblem• System cannot read data from an SD card or USB key.ActionCAUTION: Only trained service technicians are authorized to remove the systemcover and access any of the components inside the system. Before performing anyprocedure, see your Product Information Guide for complete information aboutsafety precautions, working inside the computer and protecting againstelectrostatic discharge.1 Enter the System Setup program and ensure that the SD card or USB keyport is enabled. See "Using the System Setup Program" on page 47.2 Turn off the system and attached peripherals, and disconnect the systemfrom the electrical outlet.3 Open the system. See "Opening and Closing the System" on page 70.4 Reseat the SD card or USB key.5 Close the system. See "Opening and Closing the System" on page 70.
