Optoma H78DC3 User Manual - Page 27

Problem: Image is unstable or flickering

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English Appendices 4. Verify the resolution is less than or equal to 1280 x 720. 5. Select the "Change" button under the "Monitor" tab . 6. Click on "Show all devices. " Next, select "Standard monitor types" under the SP 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 1280 x 720. 4 If using a Notebook PC: 1. First, follow the steps above to adjust resolution of the computer. 2. Switch the Notebook PC display to the "external display only" or "CRT only" mode. 4 If you experience difficulty changing resolutions or your monitor freezes, restart all the equipment including the projector. Problem: The screen of the Notebook or PowerBook computer is not displaying your presentation. 4 If using a Notebook PC: Some Notebook PCs may deactivate their own screens when a second display device is in use. Each has a different way of reactivating. Refer to your computer's documentation for detailed information. Problem: Image is unstable or flickering 4 Use "Phase" to correct it. See page 22 for more information. 4 Change the monitor color setting on your computer. Problem: Image has a vertical flickering bar 4 Use "Frequency" to make an adjustment. See page 22 for more information. 4 Check and reconfigure the display mode of your graphics card to ensure compatibility. Problem: Image is out of focus 4 Make sure the transparent lens cap is removed. 4 Use or button to focus the image. 4 Make sure the projection screen is between the required distance 3.3 to 32.8 feet (1.0 to 10.0 meters) from the projector. 28

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4.
Verify the resolution is less than or equal to 1280 x 720.
5.
Select the “Change” button under the “Monitor” tab .
6.
Click on “Show all devices. ” Next, select “Standard monitor
types” under the SP 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 1280 x 720.
4
If using a Notebook PC:
1.
First, follow the steps above to adjust resolution of the
computer.
2.
Switch the Notebook PC display to the “external display only”
or “CRT only” mode.
4
If you experience difficulty changing resolutions or your
monitor freezes, restart all the equipment including the projector.
Problem: The screen of the Notebook or PowerBook computer
is not displaying your presentation.
4
If using a Notebook PC:
Some Notebook PCs may deactivate their own screens when a
second display device is in use. Each has a different way of
reactivating.
Refer to your computer’s documentation for
detailed information.
Problem: Image is unstable or flickering
4
Use “Phase” to correct it. See page 22 for more information.
4
Change the monitor color setting on your computer.
Problem: Image has a vertical flickering bar
4
Use “Frequency” to make an adjustment. See page 22 for more
information.
4
Check and reconfigure the display mode of your graphics card to
ensure compatibility.
Problem: Image is out of focus
4
Make sure the transparent lens cap is removed.
4
Use
or
button to focus the image.
4
Make sure the projection screen is between the required distance
3.3 to 32.8 feet (1.0 to 10.0 meters) from the projector.
Appendices