I picked up an Intellivision the other day, one of the brown and gold ones, and it's in good shape, but when I connect it to my TV all I get when I turn it on is a black screen. I know it is getting power because when I turn it on the screen goes from static to black but that's it. I tried cleaning the cartridge slot, and all my games are clean to. I also tried using a different RF box that work great with my Atari and still no go. I tired taking it apart, and got 5 of the 6 screws out of the bottom, but one of them is not budging. I tried everything short of drilling it out, but the screw won't move. Help! Is it fixable or is it just good for parts? Thanks!