Troubleshooting 73Dell Technical Update ServiceThe Dell Technical Update service provides proactive e-mail notification of software and hardwareupdates for your computer. The service is free and can be customized for content, format, and howfrequently you receive notifications.To enroll for the Dell Technical Update service, go to support.dell.com/technicalupdate.Dell DiagnosticsCAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the ProductInformation Guide.When to Use the Dell DiagnosticsIf you experience a problem with your computer, run the Dell Diagnostics before you contact Dell fortechnical 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 CD is optional and may not ship with your computer.Enter the system setup program, review your computer’s configuration information, and ensure that thedevice you want to test displays in the system setup program and is active.Start the Dell Diagnostics from your hard drive or from the Drivers and Utilities CD.Starting the Dell Diagnostics From Your Hard DriveThe Dell Diagnostics is located on a hidden diagnostic utility partition on your hard drive.NOTE: If your computer cannot display a screen image, contact Dell (see "Contacting Dell" on page 143).NOTE: If the computer is connected to a docking device (docked), undock it. See the documentation that camewith your docking device for instructions.1 Ensure that the computer is connected to an electrical outlet that is known to be working properly.2 Turn on (or restart) your computer.3 Start the Dell Diagnostics in one of the following two ways:A possible modemfailure has occurred.• If available, install a working modeminto your computer.• If the problem persists, contactcontact Dell Support.Light Pattern Problem Description Suggested Resolution
