Hi everyone. I connect my Macbook Pro to my tv using the MD/HDMI lead. It worked completely fine but all of a sudden it isn't working. When I plug the lead in the blue screen comes up as usual, and when i change to the right input channel on my tv the blue screen again flashes as it would normally, but my macbook can't detect the tv. Nothing has changed, I haven't updated since last week. So i'm completely stuck. Any ideas? EDIT: I've already reset my PRAM.