68 Solving Problemsw w w . d e l l . c o m | s u p p o r t . d e l l . c o mNo sound from headphonesTouch Pad or Mouse ProblemsRE I N S T A L L T H E A U D I O D R I V E R (S E E "R E I N S T A L L I N G DR I V E R S A N D UT I L I T I E S " O N P A G E 50)RU N T H E DE L L DI A G N O S T I C S ( S E E "DE L L DI A G N O S T I C S " O N P A G E 47)CH E C K T H E H E A D P H O N E C A B L E C O N N E C T I O N — Ensure that the headphone cable is securely insertedinto the headphone connector (see page 14).AD 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 speaker icon in the lower-rightcorner of your screen. Ensure that the volume is turned up and that the sound is not muted.CH E C K T H E T O U C H P A D S E T T I N G S —1 Click the Start button, click Control Panel, and then click Printers and Other Hardware.2 Click Mouse.3 Try adjusting the settings.CH E C K T H E M O U S E C A B L E — Shut down the computer. Disconnect the mouse cable, check it fordamage, and firmly reconnect the cable.If you are using a mouse extension cable, disconnect it and connect the mouse 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.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 50.