My Clavinova CLP 560 has been working fine until lately. After playing too loudly, the speakers short out and seem to lock up for an unknown period of time. I can still get it to work again after some random length of time, but must be careful not to play too many keys at once or too loudly or it will lock up again. Any suggestions as to why this is happening? I've looked at the headphone jack and that doesn't seem to be the problem. I'd appreciate any help!