No Sound From Headphones; Touch Pad Or Mouse Problems; Video And Display Problems - Dell Latitude D810 User Manual

Disconnect headphones from the headphone connector —
connected to the 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
Run the Dell Diagnostics

No sound from headphones

Check the headphone cable connection —
Adjust the Windows volume control —
volume is turned up and that the sound is not muted.

Touch Pad or Mouse Problems

Check the touch pad settings —
Windows XP
1. Click the Start button, point to Settings, click Control Panel, and then click Printers and Other Hardware.
2. Click Mouse.
3. Try adjusting the settings.
Windows 2000
1. Click the Start button, point to Settings, and then click Control Panel.
2. Double-click the Mouse icon.
3. 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.
Check the system setup program settings —
(The computer automatically recognizes a USB mouse without making any setting adjustments.)
Test the mouse controller — To test the mouse controller (which affects pointer movement) and the operation of the touch pad or mouse
buttons, run the Mouse test in the Pointing Devices test group in the
Reinstall the touch pad driver —

Video and Display Problems

Sound from the speakers is automatically disabled when headphones are
Turn off nearby fans, fluorescent lights, or halogen lamps to check for interference.
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
Verify that the system setup program lists the correct device for the pointing device option.
See "Reinstalling Drivers and Utilities."
Dell Diagnostics.