40Using Support ToolsDell DiagnosticsIf you experience a problem with yourcomputer, perform the checks in “Lockups andSoftware Problems” on page 56 and run theDell Diagnostics before you contact Dell fortechnical assistance.It is recommended that you print theseprocedures before you begin.NOTICE: Dell Diagnostics works onlyon Dell computers.NOTE: TheDrivers and Utilities mediais optional and may not ship with yourcomputer.Review your computer’s configurationinformation, and ensure that the device thatyou want to test displays in the system setupprogram and is active. See the System Setupsection in Dell Technology Guide.Start the Dell Diagnostics from your hard driveor from theDrivers and Utilities media.Starting Dell Diagnostics From Your Hard DriveThe Dell Diagnostics is located on a hiddendiagnostic utility partition on your hard drive.NOTE: If your computer cannot displaya screen image, see “Contacting Dell”on page 52.Ensure that the computer is connected to an1.electrical outlet that is known to be workingproperly.Turn on (or restart) your computer.2.When the DELL3. ™ logo appears, press immediately. Select Diagnostics from theboot menu and press .NOTE: If you wait too long and theoperating system logo appears, continue towait until you see the Microsoft® Windows®desktop; then, shut down your computerand try again.