I purchased the QY70 and I have been very pleased with it - until now.

The problem is that it started freezing up on me. I can play patterns and it will just stop and get stuck on the last note. Has this happened to anyone else? Is there something that can be done without having to send it in to be repaired? I'm in the middle of a project and can't really afford to stop right now.
CAN ANYONE OUT THERE HELP ME?

The manual dosn't say anything about how to fix the problem.