Dell PP27L Setup And Quick Reference Manual page 70

M
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
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.
E
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
halogen lamps, or other appliances.
R
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
glare, which can cause poor picture quality.
A W
D J U S T T H E I N D O W S D I S P L A Y S E T T I N G S
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 the Windows Vista Start button
and Sound→ Personalization→ Display Settings.
2 Adjust Resolution and Colors settings, as needed.
R V
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
still have a display problem, but the display is not completely blank, run the
Video device group in the "Dell Diagnostics" on page 54, then contact Dell
(see "Contacting Dell" on page 83).
S "E M
E E R R O R E S S A G E S
on page 58.
If only part of the display is readable
C
O N N E C T A N E X T E R N A L M O N I T O R
1 Shut down your computer and connect an external monitor to the
computer.
2 Turn on the computer and the monitor, and then adjust the monitor
brightness and contrast controls.
If the external monitor works, the computer display or video controller
may be defective. Contact Dell (see "Contacting Dell" on page 83).
72
Troubleshooting
Turn off nearby fans, fluorescent lights,
—
If no error message appears and you
—
If an error message appears, see "Error Messages"
" —
—
Eliminate sunlight
—
—
→ Control Panel→ Hardware
If
—