100 Troubleshooting
RUN THE DELL DIAGNOSTICS —See "Dell Diagnostics" on page 81.
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 —Ensure that the headphone cable is securely inserted into
the headphone connector.
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 Problems
CHECK THE TOUCH PAD SETTINGS —
1
Click the
Start
button, click
Control Panel
, and then click
Printers and Other Hardware
.
2
Click
Mouse
.
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—Verify that the system setup program lists the correct
device for the pointing device option. (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 Point ing De vice s test group in
the Dell Diagnostics (see "Dell Diagnostics" on page 81).
REINSTALL THE TOUCH PAD DRIVER —See "Reinstalling Drivers and Utilities" on page108.
Video and Display Problems
Fill out the Diagnostics Checklist (see "Diagnostics Checklist" on page153) as you complete these
checks.