Solving Problems 67RU N T H E K E Y B O A R D D I A G N O S T I C S T E S T S — Run the PC-AT Compatible Keyboards tests in the DellDiagnostics. See “Dell Diagnostics” on page 57. If the tests indicate a defective external keyboard, see“Contacting Dell” on page 112.Unexpected charactersDI S A B L E T H E N U M E R I C K E Y P A D — Press to disable the numeric keypad if numbers are displayedinstead of letters. Verify that the numbers lock light is not lit.Lockups and Software ProblemsCAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the ProductInformation Guide.The computer does not start upEN S U R E T H A T T H E AC A D A P T E R I S F I R M L Y C O N N E C T E D T O T H E C O M P U T E R A N D T O T H E E L E C T R I C A L O U T L E T .The computer stops respondingNOTICE: You might lose data if you are unable to perform an operating system shutdown.TU R N T H E C O M P U T E R O F F — If you are unable to get a response by pressing a key on your keyboard or movingyour mouse, press and hold the power button for at least 8 to 10 seconds until the computer turns off. Thenrestart your computer.A program stops responding or crashes repeatedlyEN D T H E P R O G R A M —1 Press simultaneously.2 Click the Applications tab and select the program that is no longer responding.3 Click End Task.NOTE: The chkdsk program may run when you restart the computer. Follow the instructions on the screen.CH E C K T H E S O F T W A R E D O C U M E N T A T I O N — If necessary, uninstall and then reinstall the program. Softwareusually includes installation instructions in its documentation or on a floppy disk or CD.A program is designed for an earlier Microsoft® Windows® operating systemRU N T H E PR O G R A M CO M P A T I B I L I T Y WI Z A R D — The Program Compatibility Wizard configures a program soit runs in an environment similar to non-Windows XP operating system environments.1 Click the Start button, point to All Programs→ Accessories, and then click Program CompatibilityWizard.2 In the welcome screen, click Next.3 Follow the instructions on the screen.
