Dell U7021, WHL manual No sound from headphones, N T H E S P E a K E R D I a G N O S T I C S

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 computer’s front-panel 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 U N T H E S P E A K E R D I A G N O S T I C S

R E I N S T A L L T H E S O U N D D R I V E R — See page 59.

R U N T H E H A R D W A R E TR O U B L E S H O O T E R — See page 64.

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 page 70).

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.

Solving Problems

49