I just bought a 2001 Audi TT Coupe. The radio was working last week. I dont really listen to Radio much so I didnt use it but today i went to turn it on and it is completely unresponsive. The old owner said its probably a fuse. Its my first audi and i dont know how to fix it. I want to replace it with an aftermarket head unit but im afraid it might not work also because of no power.