Projector Interference...Please Help


Standard Member
Hello everyone, we have having a problem at our church with some kind of projector interference, but we have been unable to isolate the cause. This has been happening for 2 years now. One thing we noticed is the interference only happens during the fall/winter time. Everything runs smoothly during the spring/summer time. The projector runs fine for awhile, then words or video will start shaking a little then it goes to jumping around a lot. Sometimes this quits after 5 minutes, while other times it takes up to 30 minutes to stop. Naturally, this made us think the heater was the problem, but sometimes, like this morning, the heater is not on. We are running out of ideas on what could be causing this. Some details on setup and things we have tried:

We are using a signal booster that has 1 VGA input, 2 VGA outputs. One is going to a rear projector, while the other is going to a front projector. The front projector is the one that the interference happens on. The rear projector has never had any interference.

The projectors are on a seperate power circuit.
We tried switching projectors. No change.
The VGA cable is running to the front projector away and above other cables through wood raptors.

Any questions or help would be greatly appreciated!

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