Troubleshooting 127
MOVE THE EXTERNAL 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 —
1
Click
Start
→
Control Panel
→
Appearance and Personalization
→
Personalization
→
Display Settings
.
2
Click the area you want to change or click the
Display
icon.
Try different settings for
Resolution
and
Colors
.
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" on page 101, then contact Dell
(see "Contacting Dell" on page 163).
SEE "ERROR MESSAGES"—If an error message appears, see "Error Messages"
on page 109.
If only part of the display is readable
CONNECT AN EXTERNAL MONITOR —
1
Shut down your computer and connect an external monitor to the
computer.
2
Turn on the computer and the monitor, and then adjust the monitor
brightness and contrast controls.
If the external monitor works, the computer display or video controller
may be defective. Contact Dell (
see "Contacting Dell
" on page 163
).
Drivers
What Is a Driver?
A driver is a program that controls a device such as a printer, mouse, or
keyboard. All devices require a driver program.
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