Dell Precision M4300 (Mid 2007) - Manual (Page 94)

92
Troubleshooting
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 Themes.
2 Click the area you want to change or click the Display icon.
3 Try different settings for Color quality and Screen resolution.
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 (see "Dell Diagnostics" on
page 73). Then
contact Dell (see "Contacting Dell" on page 142 ).
S EE " E RROR M ESSAGES " — If an error message appears, see "Error Messages" on page 80
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 142 ).