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Troubleshooting 155
• If the power light is blinking, press a key on the keyboard or move the mouse to
resume normal operation.
TEST THE ELECTRICAL OUTLET — Ensure the electrical outlet is working by testing it
with another device, such as a lamp.
C
HECK THE DIAGNOSTIC LIGHTS — See "Power Lights" on page 123.
C
HECK 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.
M
OVE THE SUBWOOFER AWAY FROM THE MONITOR — If your speaker system
includes a subwoofer, ensure that the subwoofer is positioned at least 60 centimeters
(2 feet) away from the monitor.
M
OVE 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.
R
OTATE THE MONITOR TO ELIMINATE SUNLIGHT GLARE AND POSSIBLE
INTERFERENCE
ADJUST THE WINDOWS DISPLAY SETTINGS —
Windows XP:
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
.
Windows Vista:
1
Click
Start
Control Panel
Hardware and Sound
Personalization
Display Settings
.
2
Adjust
Resolution
and
Colors settings,
as needed.
3D image quality is poor
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.
Only part of the display is readable
CONNECT ANOTHER MONITOR —
1
Shut down your computer and connect another monitor to the computer.
2
Turn on the computer, the monitor, and adjust the monitor brightness and
contrast controls.