I have no sound when I turn on the power to the piano (the red power light does come on) but none of the LED's light up and there is no sound when the keys are played. I do have the owners manual but I can't find any info. on troubleshooting this problem. I talked with someone at a music shop in town who suggested that there may be a battery that may need to be replaced inside the keyboard. The manual doesn't talk about it, so I am puzzled as to where it would be located if there is a battery? The piano is 10 years old and I have never had any problems with it. I would appreciate any information and/or input that you may have. Thanks...Jannie