Have you tried new batteries? but that sounds more like a glitch than an "I need more juice" kind of thing. it could be the batteries company, or you may just have an unfotunate glitch, the music star does have some button lag, so it may be that the lag has gone to the point where the buttons just don't work anymore, if you have a glitchy tama there's not much you can do, getting a new one is an option though.