I have a dead 20gb DMS used in an Audi system. I have borrowed a friend's DMS and his works fine in my headunit. My DMS is not recognized in 'My Computer'. My issue started when my cartridge was in my car with outside temperatures around 0 degrees Fahrenheit. Any advice? I would like to replace my DMS cartridge or have it rebuilt by someone in or around Pittsburgh, PA. Any extra's out there? ....or people in need of a dead DMS?