Dell LATITUDE D400 - Manual (Page 20)

Rotate the computer to face a different direction — Eliminate sunlight glare, which can cause poor picture
quality.
Adjust the Windows display settings —
Windows XP
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.
Windows 2000
1. Click the Start button, point to Settings, and then click Control Panel.
2. Double-click the Display icon and click the Settings tab.
3. Try different settings for Colors, Screen area, and Advanced Settings.
Run the Video 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 . Then contact Dell .
See "Error Messages" — If an error message appears, see " Error Messages ."
If only part of the display is readable
Connect 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 .
Sound and Speaker Problems
Fill out the Diagnostics Checklist as you complete these checks.
If you have a problem with the integrated speaker
Adjust the Windows volume control — Double-click the speaker icon in the lower-right corner of your
screen. Ensure that the volume is turned up and that the sound is not muted. Adjust the volume, bass, or
treble controls to eliminate distortion.
Adjust the volume using keyboard shortcuts — See " Using the Keyboard and Touch Pad ." Press
to disable (mute) or reenable the integrated speaker.
Reinstall the sound (audio) driver — See " Reinstalling Drivers and Utilities ."
For Windows 2000 only, ensure that digital audio for the CD drive is enabled —
1. Click the Start button, point to Settings, and then click Control Panel.