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Symptom
Image has vertical
fl ickering bar.
Image is out of
focus.
Remote control
doesn't work.
ViewSonic
Cause
The display data frequency
does not match the frequency
of your computer's graphic
card.
The lens focus is not adjusted
optimally.
The projection distance is
not within the projector's
supported range.
The batteries could be weak.
The polarity is not correct.
The remote control is not
being used within the effective
range.
There are some obstructions
between the remote control
and projector.
There are some fl uorescent or
other bright lights shining at
the projector's infrared remote
sensor.
Solution
Use "Frequency" to make an
adjustment. Refer to Picture
section.
Check and reconfi gure the
display mode of your graphic
card to make it compatible
with the product.
Adjust the focus with the
focus ring.
Place the projector within the
supported range.
Replace with a new set of
batteries.
Install the batteries with
correct polarities.
Use the remote control within
the effective range.
Check that there are not
obstructions between the
remote control and projector.
Check that there are not
any fl uorescent or other
bright lights shining at the
projector's infrared remote
sensor.
34
PJ678
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