So this seems a bit odd, but I decided awhile ago that I wanted to go from an aftermarket radio back to a factory radio, recently I found one and I started to remove the aftermarket radio and replace with the factory radio, the problem that I ran across was that the radio would turn on but with no sound, is there anything that I should check for? I also was wondering since the car came with a AM/FM CD radio, would AM/FM Cassette radio make a huge difference?