344 Solving Problems
CHECK THE MONITOR POWER LIGHT —
• If the power light is lit or blinking, the monitor has power.
• If the power light is off, firmly press the button to ensure that the monitor is turned on.
• 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 that the electrical outlet is working by testing it with another device, such
as a lamp.
CHECK THE DIAGNOSTIC LIGHTS —See "Diagnostic Lights" on page347.
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 positioned at least 60 centimeters (2 feet) 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 —
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 GRAPHICS CARD POWER CABLE CONNECTION —Ensure that the power cable for the graphics card(s) is
correctly attached to the card.
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.
Power Lights
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product
Information Guide.

The power button light located on the front of the computer illuminates and blinks or remains solid to

indicate different states:

• If the power light is green and the computer is not responding, see "Diagnostic Lights" on page347.

• If the power light is blinking green, the computer is in standby mode. Press a key on the keyboard,

move the mouse, or press the power button to resume normal operation.