Troubleshooting 1413 Turn on the computer.4 At the Windows desktop, use the touch pad to move the cursor around,select an icon, and open it.If the touch pad operates correctly, the mouse may be defective.C H E C K T H E S YS T E M S E T U P P R O G R A M S E T T I N G S — Verify that the system setupprogram lists the correct device for the pointing device option (the computerautomatically recognizes a USB mouse without making any settingadjustments).T E S T T H E M O U S E C O N T R O L L E R — To test the mouse controller (which affectspointer movement) and the operation of the touch pad or mouse buttons,run the Mouse test in the Pointing Devices test group in the "DellDiagnostics" on page 111.R E I N S T A L L T H E T O U C H P A D D R I V E R — See "Reinstalling Drivers and Utilities"on page 144.Video and Display ProblemsCAUTION: Before you begin any of the procedures in this section, follow thesafety instructions in theProduct Information Guide.If the display is blankNOTE: If you are using a program that requires a higher resolution than yourcomputer supports, it is recommended that you attach an external monitor to yourcomputer.C H E C K T H E B A T T E R Y — If you are using a battery to power your computer, thebattery charge may be depleted. Connect the computer to an electrical outletusing the AC adapter, and then turn on the computer.T E S T T H E E L E C T R I C A L O U T L E T — Ensure that the electrical outlet is working bytesting it with another device, such as a lamp.C H E C K T H E AC A D A P T E R — Check the AC adapter cable connections. If theAC adapter has a light, ensure that the light is on.C O N N E C T T H E C O M P U T E R D I R E C T L Y T O A N E L E C T R I C A L O U T L E T — Bypass powerprotection devices, power strips, and extension cables to verify that thecomputer turns on.
