When connecting my macbook pro to the TV. I am getting very frustrated because I find if I don't plug in the hdmi plug and adaptor in for awhile there is suddenly a new problem with the settings. The problem this time is it's not full screen. It almost is, but there are black bars at the top and bottom. Also my settings are right. It's on 720p television, it's on DVI PC, it's all how it should be why are the black bars here when they weren't before??