we have a relatively small church and we use video projection for the words to songs and sermon notes, etc. we have a main seating area and two additional seating areas on left and right side of the main area. we have a projector in each of the seating areas as well as one on the back wall as a confidence monitor for singers on stage.
our system grew from a single projector to what we now have in small incremental steps. for that reason the current setup is somewhat convoluted. from the projection booth in the back of the main seating area, the signal is run through a Kramer VP-719DS switcher. the signal from the computer to the VP-719DS is DVI. from the VP-719DS everything is VGA.
right after the VP-719DS in the video projection booth is a Cables-to-Go 1x2 VGA distribution Amp. the thru output on this unit goes to the video recording booth upstairs (there converted to composite video to mix in with video from 2 cameras. one output goes to the projector for the back wall, and the other output goes to a point on the right side near the front (original position of the computer for video projection).
the signal to the front area is converted to Cat-5 for the 100 foot travel and back to VGA & then goes through a Cables-to-Go 1x4 VGA Distribution Amp. three of these outputs feed the projectors for each of the seating areas. the right overflow seating area has about 35 feet, the main projector has about 75 feet, and the left overflow seating area has about 120 feet of travel; all on VGA cable.
now the problem.................
every now & then and totally random (as far as we can tell) one or more of the projectors will go blank and show a message that it can't find a signal. that will last for a few seconds then the projected image will re-appear and the projector will show a message that it now has a VGA signal on port 1 for computer input. sometimes we won't see it for an entire service, but other times it may be 10-15 times in an hour (or so) service. we don't see it too often on the projectors in the overflow areas because as soon as the preacher starts the sermon, we switch to the video camera feed (so overflow people can see the Pastor). that is a whole different line and input for the projector.
early on we were only noticing this on the main projector and sent it in for warranty service twice. they couldn't find anything wrong, but replaced related circuit boards anyway (twice). now we notice this on the back and the front projector. some times simultaneously and some times individually.
now the question...................
if we were to go to a 1x4 VGA to Cat-5 Converter / Distribution Amp, and run all lines as Cat-5 to each projector then convert back to VGA for the projector; does it appear this will help with the 'signal loss' situation? (clean up the signal path, as it were)
I realize this is long, but wanted to try to give enough info to make a determination. however, if there is more info needed, let me know and I will do my best to provide it.