Dell Inspiron 1721 (Mid 2007) - Manual (Page 126)

126
Troubleshooting
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 then turn on the computer.
T EST THE ELECTRICAL OUTLET — Ensure that the electrical outlet is working by
testing it with another device, such as a lamp.
C HECK THE A C ADAPTER — Check the AC adapter cable connections. If the
AC adapter has a light, ensure that the light is on.
C ONNECT THE COMPUTER DIRECTLY TO AN ELECTRICAL OUTLET — Bypass power
protection devices, power strips, and extension cables to verify that the
computer turns on.
A DJUST THE POWER PROPERTIES — Search for the keyword sleep in Windows
Help and Support.
S WITCH 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
A DJUST THE BRIGHTNESS — Press <Fn> and the up- or down-arrow key.
M OVE 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.
E LIMINATE POSSIBLE INTERFERENCE — Turn off nearby fans, fluorescent lights,
halogen lamps, or other appliances.
R OTATE THE COMPUTER TO FACE A DIFFERENT DIRECTION — Eliminate sunlight
glare, which can cause poor picture quality.
A DJUST THE W INDOWS 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.
R UN THE V IDEO 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 97, then contact Dell
(see "Contacting Dell" on page 175).