I have an HDTV by Samsung, it's an LN'T5271F and when I turn the unit on in the morning, it has a double image on the left side of the screen, the right 2/3's of the screen are normal, this lasts for up to 10 minutes, and after some time a dark band will appear in the center of the screen, this will, also, go away after a few minutes. Would anyone have any ideas? Thanks