Troubleshooting Your System 14114 If a memory error occurs:a Remove power from the system and attached peripherals, anddisconnect the system from its electrical outlet.b Open the system. See "Removing the Top Cover" on page 60.c Perform step c through step f in step 13 for each memory moduleinstalled.If the problem persists, see "Getting Help" on page 165.Troubleshooting an Optical DriveProblem• System cannot read data from a CD or DVD in an optical drive.• Optical drive indicator does not blink during boot.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 Try using a different CD or DVD that you know works properly.2 Enter the System Setup program and ensure that the drive’s Optical DriveController is enabled. See "Using the System Setup Program" on page 41.3 Run the appropriate online diagnostic test. See "Using PowerEdgeDiagnostics" on page 149.4 Remove power from the system and attached peripherals, and disconnectthe system from the electrical outlet.5 Open the system. See "Removing the Top Cover" on page 60.6 Ensure that the interface cable is securely connected to the optical driveand to the backplane.7 Close the system. See "Installing the Top Cover" on page 60.8 Reconnect the system to the electrical outlet, and turn on the system andattached peripherals.