Dell YH242 owner manual Video and Monitor Problems, No sound from headphones, Screen is blank

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 E I N S T A L L T H E S O U N D D R I V E R — See "Reinstalling Drivers" on page 71.

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 "Resolving Software and Hardware Incompatibilities" on page 72.

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 "Front View of the Computer" on page 13).

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.

Video and Monitor Problems

CAUTION: Before you perform any of the procedures in this section, follow the safety instructions in the Product Information Guide.

NOTE: See the monitor documentation for troubleshooting procedures.

The screen is blank

C H E C K T H E M O N I T O R C A B L E C O N N E C T I O N —

•Ensure that the monitor cable is connected as shown on the setup diagram for your computer.

•Remove any video extension cables and connect the monitor directly to the computer.

•Swap the computer and monitor power cables to determine if the power cable is defective.

•Check the connectors for bent or broken pins (it is normal for monitor cable connectors to have missing pins).

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Solving Problems