my friend is just setting up his system and due to the amount of av sources he has and lack of inputs on the plasma, he needs to run the video inputs through his av amp, but for some reason the video out isn't switching the channels on his plasma, is this due to a setting within the amp or setting on the plasma possibly, he seems to believe the video out signal in knackered on the amp but i'm curious to know whether its just a setting somewhere? any help would be much appricated. Oh his system comprises of a sony str-d780, dvd(pionner), sky decoder, plasma screen(unsure of make and model), front projector(toshiba) and motorised screen with the pc running through the amp also. its only for av use, his audio set up is a completely seperate set up. so if any one can think of the best way to set all this up, that would be great thanks.