Hi, I'm pretty new to this so apologies if I'm in the wrong place. I have a tv, surround system and laptop. I currently have the laptop video sent using s video (no VGA input on tv) and the audio sent by a 3.5mm to RCA to the aux on the surround. Now here is the problem, if I plug in the video phono from the surround in to the tv or if I have the tv sound RCA out plugged in to the surround (I have the auc input on the surround split in to two) I get a horrible hum with lots of hard disk working type noises. I get this whether both the video and phono are plugged in to the tv or just one of them. So at the minute it's a matter of just having one plugged in either the laptop or the tv in to the surround. I'd like a solution to be able to have both plugged in and there be no strange noises. The noise does disapeer when the laptop charger is unplugged but my laptop doesn't charge so always has to be plugged in. Any help is greatly appreciated!!