I haven't used my keyboard in a long time. It's been sitting in my garage for at least five years, but it worked perfectly when we put it in there. I just got it out of the garage and I got a new adapter for it, but it's not turning on. I was wondering if I'm missing out on extra cords I need for it to work or anything. And will it run on just batteries with no adapter? Pleeeeeeeeeease help me.