I have just bought LG4130S home cinema to go with my 47INCH LGTV and the cables provided arent having any effect? the only three outlets on the cinema box are ,WHITE ,RED YELLOW aux,video , and the cable they provided is a yellow video and nothing is happening so do i need to buy that three coloured cable to go from those outlets and into the the same outlets on my t.v to get surround sound from t,v PLEASE HELP wifes going mad ? i await your reply NICK