Hello, I am watching films from my PCs tv-out direct through s-vid and 2 phono cable to a svid and 2 phono scart. I have a sony sub connected via the TVs Subwoofer out. I have enabled sub woofer external in the Toshiba menus. TV is a Toshiba 50wt29b. I am not hearing any noise from the sub, either when viewing pc films, or Digital or analogue broadcasts through the TV. Am I doing something wrong or are you only likely to hear sub bass when a DVD is connected?