I have an Optoma HD 72. It was installed about two weeks ago. Just recently I began to notice a horizontal line that moves from the bottom to the top of the screen. It repeats about every twenty four inches. Sometimes the line is faint and only visible during dark scenes and sometimes it has a green and red tint to it. It occurrs while watching TV and DVD's. I don't know if this has been occurring for the last two weeks or not, but I now notice it every time I watch. Any help with what is causing this and/or how to correct it wiould be greatly appreciated.
