I just tried again as you said but it didn't work for me. This all started when i change my spark plaug. Negative battery out to change my spark plugs, plug back in and start my car but I remember that I forgot to plug my mass air so I shut my car and took negative battery out so I could set my computer . After that cd never worked and just gives me cd error. It used to make lot's of noise when you reset your computer with battery off but now it don't do *****