I am trying to set up my sky+ tv for the sound to go through my onkyo sr606 amp surround sound, I'm using an optical audio cable to do this. I also have a ps3 running on the amp that works fine anytime, all the time, which is connected through hdmi cable. If I turn on the amp then the tv and sky+ box there is no sound, however if I power up the ps3 then turn it of, then immediately turn on the sky+ box it works fine????! I can't understand why this is, does it find some kind of feed through the ps3 then switch? I dont know.....can anybody please help? Thanx