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104 Troubleshooting
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Video and Display Problems
Fill out the Diagnostics Checklist (see "Diagnostics Checklist" on page 163) as you complete these
checks.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the
Product Information Guide
.
If the display is blank
NOTE: If you are using a program that requires a higher resolution than your computer supports, it is
recommended that you attach an external monitor to your computer.
C
HECK THE BATTERY—
If you are using a battery to power your computer, the battery charge may be
depleted. Connect the computer to an electrical outlet using the AC adapter, and turn on the
computer.
TEST THE ELECTRICAL OUTLET—
Ensure that the electrical outlet is working by testing it with another
device, such as a lamp.
CHECK THE AC ADAPTER—
Check the AC adapter cable connections. If the AC adapter has a light,
ensure that the light is on.
CONNECT THE COMPUTER DIRECTLY TO AN ELECTRICAL OUTLET—
Bypass power protection devices, power strips,
and the extension cable to verify that the computer turns on.
ADJUST THE POWER PROPERTIES—
Search for the keyword
standby
in the Windows Help and Support
Center (click
Start
→
Help and Support
).
SWITCH THE VIDEO IMAGE—
If your computer is attached to an external monitor, press <Fn><F8> to
switch the video image to the display.
If the display is difficult to read
ADJUST THE BRIGHTNESS—
Press <Fn> and the up- or down-arrow key
MOVE 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.
ELIMINATE POSSIBLE INTERFERENCE—
Turn off nearby fans, fluorescent lights, halogen lamps, or other
appliances.
ROTATE THE COMPUTER TO FACE A DIFFERENT DIRECTION—
Eliminate sunlight glare, which can cause poor
picture quality.
ADJUST THE WINDOWS DISPLAY SETTINGS—
1
Click the
Start
button and then click
Control Panel
.
2
Click
Appearance and Themes
.
3
Click the area you want to change or click the
Display
icon.
4
Try different settings for
Color quality
and
Screen resolution
.