I recently bought a 6 disc out of another Focus. It worked for a night and because the radio sat not used it kept two of my cd's. I got them out and plugged the cd player back in to see if it would work. It did, but the screen died and I couldn't see anything. So I was wondering what a solution might be to fix this that wouldn't cost a lot. Was also wondering if anyone knew what the small square red plug in is. My original radio doesn't have it but it is on my harness.