NEC LT20 - Manual (Page 30)

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Appendices
4. Follow the above steps 1-2. Click on the “Advanced Properties”
button.
5. Select the “Change” button under the “Monitor” tab.
6. Click on “Show all devices”. Then select “Standard monitor
types” under the “Manufacturers” box; choose the resolution
mode you need under the “Models” box.
7. Verify that the resolution setting of the monitor display is less
than or equal to 1024 x 768.
 If you are using a Notebook PC:
1.
You are required to implement the above steps of resolution
setting of the computer first.
2. Switch the Notebook PC display to the “external display only”
or “CRT only” mode.
 If you experience difficulty in changing resolutions or your
monitor freezes, restart all the equipment and the projector.
Problem: The screen of the Notebook or PowerBook computer
is not displaying your presentation.
 If you are using a Notebook PC:
Some Notebook PCs may deactivate their screens when a second
display device is in use. Refer to your computer’s documentation
for information on how to reactivate the monitor display.
 If you are using an Apple PowerBook:
In Control Panels, open the PowerBook Display to select Video
Mirroring “On”.
Problem: Image is unstable or flickering
 Use “Phase” to correct it. Refer to page 21.
 Change the monitor color setting from your computer.
Problem: Image has vertical flickering bar
 Use “Clock” to make an adjustment. Refer to page 21.
 Check and reconfigure the display mode of your graphic card to
make it compatible with the projector. Refer to page 25.
Problem: Image is out of focus
 Adjusts the Focus Ring on the projector lens. Refer to page 14.
 Make sure the projection-screen is between the required distance
4.9 to 32.8 feet (1.5 to 10.0 meters) from the projector.