Goodnight friend . I have a sony genesy mhc - ex9 team. And then it has a problem. I was as usual in usb mode. In an adequate volume. And suddenly in a while I wanted to minimize the volume manually because I have no control. The volume did not change because I wanted to change the function and I did not have the option to press the radio button. And nothing pressed cd and nothing stayed in usb mode playing music and then press the power mode to turn it off and nothing. Well, what I did was disconnect it. And when I switched it on again, nothing turns everything on and demo mode comes out and doesn't press any function. I would like to help me from now thank you very much greetings.