Hi There, I have a Macbook Pro and have been using a min Displayport to HDMI adapter for a while now with my LG tv and it works brilliantly. I have just bought a new Panasonic TV, when I connect it up like before I just get a black screen on the Panasonic, if I restart the mac sometimes a picture comes up on the TV but the colours are all wrong and the picture doesn't fit the screen properly. Then if you try to change a setting it just goes back to be being black! Would anybody be able to help. Thanks a lot.