Hello everyone, My Kurzweil lately has been not making any sound after it's been on a while. Everything lights up, but there's just no sound. I can shut it down for about 15 minutes and it will work again, just until it gets warm, then I lose all sounds again. I did a concert over the weekend and just before the sound went out, the sustaining pedal stopped working. I unplugged it and plugged it back in and it wouldn't release, then all of the sounds stopped. Has anyone ever experienced this or have any idea what it could be. I have another concert coming up and I hope that I can use it. Thanks in advance for your help.