80 Troubleshooting ToolsDell DiagnosticsCAUTION: Before you begin any of the procedures in this section, follow thesafety instructions in the Product Information Guide.When to Use the Dell DiagnosticsIf you experience a problem with your computer, perform the checks in Lockupsand Software Problems (see "Lockups and Software Problems" on page 58) andrun the Dell Diagnostics before you contact Dell for technical assistance.It is recommended that you print these procedures before you begin.NOTICE: The Dell Diagnostics works only on Dell™ computers.NOTE: The Drivers and Utilities media is optional and may not ship with your computer.See "System Setup" on page 172 to review your computer’s configurationinformation, and ensure that the device that you want to test displays in thesystem setup program and is active.Start the Dell Diagnostics from your hard drive or from the Drivers andUtilities media.Starting the Dell Diagnostics From Your Hard DriveThe Dell Diagnostics is located on a hidden diagnostic utility partition onyour hard drive.NOTE: If your computer cannot display a screen image, see "Getting Help" onpage 183.1 Ensure that the computer is connected to an electrical outlet that isknown to be working properly.2 Turn on (or restart) your computer.3 When the DELL™ logo appears, press immediately.Select Utility Partition from the boot menu and press .NOTE: If you wait too long and the operating system logo appears, continue towait until you see the Microsoft® Windows® desktop; then, shut down yourcomputer and try again.NOTE: If you see a message stating that no diagnostics utility partition hasbeen found, run the Dell Diagnostics from the Drivers and Utilities media.4 Press any key to start the Dell Diagnostics from the diagnostics utilitypartition on your hard drive.