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92 Troubleshooting
If the display is difficult to read
ADJUST THE BRIGHTNESS — Press <Fn> and the up- or down-arrow key.
M
OVE 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.
E
LIMINATE POSSIBLE INTERFERENCE — Turn off nearby fans, fluorescent lights, halogen lamps, or other
appliances.
R
OTATE THE COMPUTER TO FACE A DIFFERENT DIRECTION — Eliminate sunlight glare, which can cause poor
picture quality.
A
DJUST THE WINDOWS DISPLAY SETTINGS —
1
Click
Start
→
Control Panel
→
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
.
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 (see "Dell Diagnostics" on
page 73). Then
contact Dell (see
"Contacting Dell" on page 143
).
SEE "ERROR MESSAGES"—If an error message appears, see "Error Messages" on page 80.
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 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 143
).