Touch Pad Or Mouse Problems; No Sound From Headphones - Dell Latitude D820 User Manual

Ensure that the subwoofer and the speakers are turned on —
adjust the volume, bass, or treble to eliminate distortion.
Adjust the Windows volume control —
that the sound is not muted.
Disconnect headphones from the headphone connector —
computer's front-panel headphone connector.
Test the electrical outlet — Ensure that the electrical outlet is working by testing it with another device, such as a lamp.
Eliminate possible interference —
Reinstall the audio driver — See
Run the Dell Diagnostics — See Dell
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

Check the headphone cable connection —
Adjust the Windows volume control —
that the sound is not muted.
Touch Pad or Mouse Problems
Check the touch pad settings —
1. Click Start® Control Panel® Printers and Other Hardware® Mouse.
2. Try adjusting the settings.
Check the mouse cable — Shut down the computer. Disconnect the mouse cable, check it for damage, and firmly reconnect the cable.
If you are using a mouse extension cable, disconnect it and connect the mouse directly to the computer.
To verify that the problem is with the mouse, check the touch pad —
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.
See the setup diagram supplied with the speakers. If your speakers have volume controls,
Click or double-click the speaker icon in the lower-right corner of your screen. Ensure that the volume is turned up and
Sound from the speakers is automatically disabled when headphones are connected to the
Turn off nearby fans, fluorescent lights, or halogen lamps to check for interference.
Reinstalling Drivers and Utilities.
Diagnostics.
Ensure that the headphone cable is securely inserted into the headphone connector.
Click or double-click the speaker icon in the lower-right corner of your screen. Ensure that the volume is turned up and