Dell Latitude C540 - Manual (Page 63)

Adjust the brightness - See " Adjusting Brightness " for instructions on adjusting the
brightness.
Move the subwoofer away from the computer or monitor - If your external speaker
system includes a subwoofer, ensure that the subwoofer is at least 60 cm (2 ft) away from the
computer or external monitor.
Eliminate possible interference - Turn off nearby fans, fluorescent lights, halogen lamps, or
other appliances.
Rotate the computer to face a different direction - Eliminate sunlight glare, which can
cause poor picture quality.
Adjust the Windows display settings
Windows XP
Click the Start button and then click Control Panel. 1.
Click Appearance and Themes. 2.
Click the area you want to change or click the Display icon. 3.
Try different settings for Color quality and Screen resolution. 4.
Windows 2000
Click the Start button, point to Settings, and then click Control Panel. 1.
Double-click the Display icon and then click the Settings tab. 2.
Try different settings for Colors, Screen area, and Advanced Settings. 3.
Run the Video diagnostics tests - If no error message appears and you still have a display
problem, but the display is not completely blank, run the Video device group in the Dell
Diagnostics . Then contact Dell .
See "Error Messages" - If an error message appears, see " Error Messages ."
If only part of the display is readable
Connect an external monitor
Turn off your computer and connect an external monitor to the computer. 1.
Turn on the computer and the monitor and adjust the monitor brightness and contrast
controls. 2.
If the external monitor works, the computer display or video controller may be defective.
Contact Dell .
Sound and Speaker Problems