48 Quick Reference GuideIf computer problems occur that require help from Dell, write a detaileddescription of the error, beep codes, or diagnostic light patterns, record yourExpress Service Code and Service Tag below, and then contact Dell from thesame location as your computer.For an example of the Express Service Code and Service Tag, see "FindingInformation" in your computer User’s Guide.Dell 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 inLockups and Software Problems (see the online User’s Guide for details) 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 yourcomputer.See "System Setup" in the online User’s Guide to review your computer’sconfiguration information, and ensure that the device that you want to testdisplays in the system 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, contact Dell.1 Ensure that the computer is connected to an electrical outlet that isknown to be working properly.Express Service Code:Service Tag:
