Hey, My system consists of a Beovision 7 (with Beolab 7) and a pair of Beolab 5. I have for a long time had my computer connected to it (through DVI and digital coax inputs on the back of the TV). When I want to listen to music, I have to press PC on my Beo4 remote (TV and Beolab 5 speakers turn on) and then P.Mute to make the screen go black (it still