The picture keeps getting darker and darker.Picture a person wearing a black suit blending in with the background enough to where you cant tell the suit from the background.I tried to lighten it up with the remote pulling up the menu,but its not working.Is it a technical problem.Maybe an electronic "board" that controls the picture quality needs replacing?How would I locate that part to replace it if at all possible?There are no repair shops in my vicinity and I'd hate to throw it out.It's only 4 years old.Anyone?Help?