Traveling horizontal lines on a projector display? Answered
I hooked up this projector at work (it's a BenQ) and when I view the projected image (in this case a computer screen) I see horizontal lines traveling up the picture.
This projector is the only thing on the circuit right now. I had to branch off the existing electrical line to add a new plug on the ceiling. When I plug the projector into the existing outlets I get no lines, when I plug it into the outlet I installed I get lines. The existing outlets on the circuit are all isolated grounds. I have tried wiring in a regular outlet and then switched it to an isolated ground when the lines appeared, thinking it could be a ground issue. I know my wiring is correct as I've installed these projectors before.
What could it be?