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Unstable or flickering image
If the projector’s image is unstable or flickering, the frequency or tracking settings on your input
source could be different from the settings on your projector.
I MP OR TA N T
Write down your setting values before adjusting any of the settings in the following procedure.
g To resolve your unstable or flickering image
1. Check the display mode of your computer’s graphics card. Make sure it matches one of the
projector’s compatible signal formats (see Video format compatibility on page 27). Refer to
your computer’s manual for more information.
2. Configure the display mode of your computer’s graphics card to make it compatible with the
projector. Refer to your computer’s manual for more information.
3. Optionally, reset the projector as described in Resetting the projector on next page to adjust
the frequency and tracking to their original values.
I MP OR TA N T
This action resets all values to their defaults.
4. If the previous steps don’t resolve the flickering image, replace the projector lamp (see
Replacing the projector lamp module on page 33).
Unaligned projected image
Alignment errors occur when the projected image isn’t perpendicular to the screen. Alignment errors
can occur when you mount your interactive whiteboard system on an uneven surface or a wall that
has obstructions, or if you swivel the projector too far from the vertical center of your interactive
whiteboard.
The projector image can slip if the projector is moved often or installed in a location prone to vibration,
such as next to a heavy door. Follow these precautions to help prevent the image from becoming
unaligned:
l Make sure that the installation wall is plumb and square and doesn’t move or vibrate
excessively.
l Make sure that there are no obstructions behind the projector’s wall-mounting bracket and that
the bracket is firmly secured to the wall according to the installation instructions.
l Make sure that the projection surface is flat and smooth.
C H AP T ER 6
Troubleshooting your interactive projector
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