E S T T H E E L E C T R I C A L O U T L E T
T
testing it with another device, such as a lamp.
H E C K T H E
C
AC
AC adapter has a light, ensure that the light is on.
O N N E C T T H E C O M P U T E R D I R E C T L Y T O A N E L E C T R I C A L O U T L E T
C
protection devices, power strips, and extension cables to verify that the
computer turns on.
D J U S T T H E P O W E R P R O P E R T I E S
A
Help and Support.
W I T C H T H E V I D E O I M A G E
S
monitor, press <Fn><F8> to switch the video image to the display.
If the display is difficult to read
D J U S T T H E B R I G H T N E S S
A
O V E T H E E X T E R N A L S U B W O O F E R A W A Y F R O M T H E C O M P U T E R O R M O N I T O R
M
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.
L I M I N A T E P O S S I B L E I N T E R F E R E N C E
E
halogen lamps, or other appliances.
O T A T E T H E C O M P U T E R T O F A C E A D I F F E R E N T D I R E C T I O N
R
glare, which can cause poor picture quality.
D J U S T T H E
A
W
1 Click Start
Personalization→ Display Settings.
2 Click the area you want to change or click the Display icon.
Try different settings for Resolution and Colors.
U N T H E
I D E O D I A G N O S T I C S T E S T S
R
V
still have a display problem, but the display is not completely blank, run the
Video device group in the "Dell Diagnostics" on page 101, then contact Dell
(see "Contacting Dell" on page 179).
E E
R R O R
S
"E
M
on page 112.
130
Troubleshooting
—
Check the AC adapter cable connections. If the
A D A P T E R
—
If your computer is attached to an external
—
Press <Fn> and the up- or down-arrow key.
—
I N D O W S D I S P L A Y S E T T I N G S
→ Control Panel→ Appearance and Personalization→
If an error message appears, see "Error Messages"
E S S A G E S
" —
Ensure that the electrical outlet is working by
Search for the keyword sleep in Windows
—
Turn off nearby fans, fluorescent lights,
—
—
If no error message appears and you
—
Bypass power
—
Eliminate sunlight
—
If
—