I have a macbook that is hooked to my lcd tv via an hdmi port. I've been watching netflix and hulu this way for months. The other day my macbook froze and I had to reboot it and since then when connected to the tv, the tv only shows my background. It doesn't show any of my windows that I have open. Are there settings on the mac or the tv that I should be fiddling with to fix this?? I don't want to buy a new cord or an apple tv unnecessarily. Thanks!!