Dell Inspiron 640M - Manual (Page 99)

Troubleshooting
99
R EINSTALL THE AUDIO DRIVER — See "Reinstalling Drivers and Utilities" on page 101.
R UN THE D ELL D IAGNOSTICS — 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
C HECK THE HEADPHONE CABLE CONNECTION — Ensure that the headphone cable is securely inserted into
the headphone connector (see "audio connectors" on page 20).
A DJUST THE W INDOWS 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
C HECK 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.
C HECK 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.
T O 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.
R EINSTALL THE TOUCH PAD DRIVER — See "Reinstalling Drivers and Utilities" on page 101.
Video and Display Problems
CAUTION:
Before you begin any of the procedures in this section, follow the safety instructions in the Product
Information Guide.
If the display is blank
NOTE:
If you are using a program that requires a higher resolution than your computer supports, it is
recommended that you attach an external monitor to your computer.