124 TroubleshootingAD J U S T T H E WI N D O W S V O L U M E C O N T R O L — Click or double-click the speakericon in the lower-right corner of your screen. Ensure that the volume is turnedup and that the sound is not muted.Touch Pad or Mouse ProblemsCH E C K T H E T O U C H P A D S E T T I N G S —1 Click Start → Control Panel→ Hardware and Sound→ Mouse.2 Adjust the settings, as needed.CH E C K T H E M O U S E C A B L E — Shut down the computer, disconnect the mousecable and check it for damage, then firmly reconnect the cable.If you are using a mouse extension cable, disconnect it and connect themouse directly to the computer.TO V E R I F Y T H A T T H E P R O B L E M I S W I T H T H E M O U S E , C H E C K T H E T O U C H P A D —1 Shut down the computer.2 Disconnect the mouse.3 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.CH 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).TE 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 99.RE 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 127.
