I'm new to this and was just wondering if my Directv h20 receiver can be hooked up to my computer as well as my tv. The receiver is hooked up to the tv using the hdmi. My computer is a hp media center and the directv receiver has s- video and audio outputs but when I try to hook this up I get no signal. Am I doing something wrong or is this just not going to work. Any help is appreciated and thanks in advance.