Hi, I bought this Displayport to HDMI from monoprice.com http://www.monoprice.com/products/p...=10428&cs_id=1042802&p_id=5311&seq=1&format=2 Hooked it up to my Panasonic plasma TH-50PX75U but I get no image. When I turn the TV off and on the Macbook's screen refreshes (gets black and then comes back). I went to settings -> display -> detect displays and nothing shows up. Anyone have this problem and find a way to fix it? Thanks in advance.