I\'m getting some vertical wavy lines that are usually only visible in very dark scenes, with my projector. I tried plugging into a different circuit if it were a ground loop, tried different input devices, unplugged everything on the circuit to see if it was interfering, unplugged the audio, but nothing helped. I even tried a cheater plug (a non grounded adapter) to see if that would help with the interference, but nope. Any ideas