Troubleshooting 31Dell DiagnosticsCAUTION: Before you begin any of the procedures in this section, follow thesafety instructions that shipped with your computer.When to Use Dell DiagnosticsIf you experience a problem with your computer, perform the checks in"Solving Problems" on page 35 and run Dell Diagnostics before you contactDell for technical assistance.NOTE: Dell Diagnostics work only on Dell computers.It is recommended that you print these procedures before you begin.Start Dell Diagnostics from your hard drive or from the Drivers and Utilitiesmedia.Starting Dell Diagnostics From Your Hard Drive1 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. SelectDiagnostics 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 (see"Starting Dell Diagnostics From the Drivers and Utilities Media" on page 32).4 Press any key to start the Dell Diagnostics from the diagnostics utilitypartition on your hard drive.NOTE: The Quickboot feature changes the boot sequence for the currentboot only. Upon restart, the computer boots according to the boot sequencespecified in system setup.