This question is a long shot. The touch screen is dim or off most of the time. I used to be able to hit the dash hard and it would come back on, but that trick doesn't work anymore. I've taken apart the stereo before, and a few ribbons look pretty weak, but I'm not sure which ones need replacement for this specific problem. I'd rather only replace what I have to. Does anyone know which might have to do with the brightness? I've narrowed it down to a few.
