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We are looking for advice on how to improve the reliability of over head projector in a House Of Worship application.
Currently we are using VGA cable to connect the PC to the over head projectors at a distance of about 20 to 30 meters.
Though system is working most of the time, we encounter from time to time ; intermittent loss of signal glitches, display colour problems, PC resolution settings compatibility and display not fitting the screen etc
We suspect its to do with the long distance between the source and the projector. We are considering installing a 2nd connection to the projector using AV extender on Cat cable, not sure whether to use the HDMI or VGA signal from the PC.

We would appreciate any suggestion or advice to improve our set up. Thanks
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