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.
C
HECK THE DIAGNOSTIC LIGHTS — See "Diagnostic Lights" on page 347.
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 GRAPHICS CARD POWER CABLE CONNECTION — Ensure that the power cable for the graphics card(s) is
correctly attached to the card.
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.
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 page 347.
• 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.
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