Solving Problems 35
If the screen is difficult to read
TEST  THE ELECTRICAL OUTLET — Ensure that the electrical outlet is working by testing it with another 
device, such as a lamp.
CHECK THE DIAGNOSTIC LIGHTS —See page 37.
RUN THE DELL DIAGNOSTICS — See page 40.
CHECK THE MONITOR SETTINGS — See the monitor documentation for instructions on adjusting the 
contrast and brightness, demagnetizing (degaussing) the monitor, and running the monitor self-test.
MOVE THE SUBWOOFER AWAY FROM THE MONITOR — If your speaker system includes a subwoofer, 
ensure that the subwoofer is at least 60 cm (2 ft) away from the monitor.
MOVE THE MONITOR AWAY FROM EXTERNAL POWER SOURCES — Fans, fluorescent lights, halogen 
lamps, and other electrical devices can cause the screen image to appear "shaky." Turn off nearby devices 
to check for interference.
ROTATE THE MONITOR TO ELIMINATE SUNLIGHT GLARE AND POSSIBLE INTERFERENCE
ADJUST THE WINDOWS DISPLAY SETTINGS —
1
Click the 
Start
 button, click 
Control Panel
, and then click 
Appearance and Themes
.
2
Click 
Display
 and click the 
Settings
 tab.
3
Try different settings for 
Screen resolution 
and 
Color quality.