So this car is new to me, and it's been a minute since I messed with these and I'm really excited about working on these again. Anyway, to the point of this post, my radio is not producing sound. It does however, have a green or red LED in the upper right corner of the tuner screen. It alternates being green one time and red the next. I'm assuming this has been converted to a more modern version and I'm wondering if anyone else has one like this. Thanks in advance and hope I posted this in the right place.