Dell DT549, PP22X owner manual Touch Pad or Mouse Problems, No sound from headphones

A D J U S T T H E W I 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-right corner of your screen. Ensure that the volume is turned up and that the sound is not muted.

D I S C O N N E C T H E A D P H O N E S F R O M T H E H E A D P H O N E C O N N E C T O R — Sound from

the speakers is automatically disabled when headphones are connected to the headphone connector.

TE 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 by testing it with another device, such as a lamp.

E L I M I N A T E P O S S I B L E I N T E R F E R E N C E — Turn off nearby fans, fluorescent lights, or halogen lamps to check for interference.

R E I N S T A L L T H E A U D I O D R I V E R — See "Reinstalling Drivers and Utilities" on page 130.

R U N T H E D E L L D I A G N O S T I C S — See "Dell Diagnostics" on page 99.

NOTE: The volume control in some MP3 players overrides the Windows volume setting. If you have been listening to MP3 songs, ensure that you did not turn the player volume down or off.

No sound from headphones

C H 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 inserted into the headphone connector (see "audio connectors" on page 29).

A D J U S T T H E W I 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-right corner of your screen. Ensure that the volume is turned up and that the sound is not muted.

Touch Pad or Mouse Problems

C H E C K T H E T O U C H P A D S E T T I N G S —

1Click Start →Control Panel→Hardware and Sound→Mouse.

2Adjust the settings, as needed.

C H E C K T H E M O U S E C A B L E — Shut down the computer, disconnect the mouse cable and check it for damage, then firmly reconnect the cable.

If you are using a mouse extension cable, disconnect it and connect the mouse directly to the computer.

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Troubleshooting