It would really help if you provided us with some more, in fact any factual information. What exactly did you notice? Were there explosions / sparks (usually means yes it is broken in my experience). What happens when you plug the thing in, and connect it to componants? Do you have a volt / multi-meter to test the outputs? Does the power cut out, or just not turn on at all? Does connecting different componants affect the performance, if so what combination produces which results? Generally use the scientific methods for practical experients you should have learnt at school aged between 14 - 18, and please let us know the results. We should hopefully be able to help you more then.