Dell Latitude D631 (Early 2009) - Manual (Page 98)

98 Troubleshooting
E L I M I N A TE PO S S I B L E I N T E RF ER E N C E — Turn off nearby fans, fluorescent lights, or halogen lamps to check
for interference.
R E I N S T A L L T H E A U D I O D RI VE R — See "Reinstalling Drivers and Utilities" on page 102.
R U N TH E D E L L D I A G N O S T I C S — See "Dell Diagnostics" on page 79.
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 H E C K T H E H E A D P H O N E CA BLE C O N N E C TI O N — Ensure that the headphone cable is securely inserted into
the headphone connector.
A D J U ST TH E W INDO WS V O L U M E C O N T R O L — 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 H E C K T H E T O U C H PAD SE T T I NG S —
1 Click the Start button, click Control Panel, and then click Printers and Other Hardware.
2 Click Mouse.
3 Try adjusting the settings.
C H E C K T H E M O U S E C A B L E — 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 V E RI F Y T H A T T H E P R O B L E M I S WIT H T H E M O U S E , C H E C K T H E T O U C H 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.
C H E C K T H E S YS T E M SE T U P P R O G R A M S E TT I N G S — 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.)
T E ST T H E M O U S E CO N TR O LL E R — 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 Dell Diagnostics (see "Dell Diagnostics" on page 79).
R E I N S T A L L T H E T O U C H P A D D R I V E R — See "Reinstalling Drivers and Utilities" on page 102.