Dell Inspiron 640M - Manual (Page 100)

100
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 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 the extension cable to verify that the computer turns on.
A DJUST THE POWER PROPERTIES — Search for the keyword standby in the Windows Help and Support
Center. To access the Help and Support Center, see "Windows Help and Support Center" on page 13.
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 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.
S EE " E RROR M ESSAGES " — If an error message appears, see "Error Messages" on page 88.
If only part of the display is readable
C ONNECT AN EXTERNAL MONITOR —
1 Shut down your computer and connect an external monitor to the computer.
2 Turn on the computer and the monitor and 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 135.