Laptop User Manual

128 Troubleshooting
CONNECT THE COMPUTER DIRECTLY TO AN ELECTRICAL OUTLET — Bypass power
protection devices, power strips, and extension cables to verify that the
computer turns on.
ADJUST THE POWER PROPERTIES — Search for the keyword sleep in Windows
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 Start → Control Panel → Appearance and Personalization →
Personalization
→ Display Settings .
2 Click the area you want to change or click the Display icon.
Try different settings for
Resolution and Colors .
RUN THE VIDEO DIAGNOSTICS TESTS — If no error message appears and you
still have a display problem, but the display is not completely blank, run the
Video device group in the "Dell Diagnostics" on page 99, then contact Dell
(see "Contacting Dell" on page 177).
SEE "ERROR MESSAGES"—If an error message appears, see "Error Messages"
on page 110.