Dell Latitude C540 - Manual (Page 68)

Check the touch pad settings
Windows XP
Click the Start button, click Control Panel, and then click Printers and Other
Hardware. 1.
Click Mouse. 2.
Try adjusting the settings. 3.
Windows 2000
Click the Start button, point to Settings, and then click Control Panel. 1.
Double-click the Mouse icon. 2.
Try adjusting the settings. 3.
Check the mouse cable - Shut down the computer. Disconnect the mouse cable and check it
for damage. For PS/2 cables, check the cable connector for bent or broken pins. 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
Turn off the computer. 1.
Disconnect the mouse. 2.
Turn on the computer. 3.
At the Windows desktop, use the touch pad to move the cursor around, select an icon,
and open it. 4.
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 Pointing
Devices device group in the
Dell Diagnostics .
Reinstall the touch pad driver - See " Reinstalling Software ."
External Keyboard Problems
Fill out the Diagnostics Checklist as you perform the various checks.
NOTE: Use the integrated keyboard when working in MS-DOS® mode or when running the Dell
Diagnostics or the system setup program . When you attach an external keyboard, the integrated
keyboard remains fully functional.