No sound from headphonesCheck the headphone cable connection —Ensure that the headphone cable is securely inserted into the headphone connector (see audio connectors).Adjust the Windows volume control —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 ProblemsCheck the touch pad settings —1. Click Start ® Control Panel® Hardware and Sound® Mouse.2. Adjust the settings, as needed.Check the mouse cable —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.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 —Verify that the system setup program lists the correct device for the pointing device option (the computer automatically recognizes a USB mouse withoutmaking 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 PointingDevices test group in the Dell Diagnostics.Reinstall the touch pad driver —See Reinstalling Drivers and Utilities.Video and Display ProblemsFill out the Diagnostics Checklist as you complete these checks.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 notturn the player volume down or off.
