Thank you Mike and Kenneve. I’ve never had any problems or issues with this great Clavinova keyboard. My enquire was only if a problem arose, like it freezing, it is good to know procedure. I’ve previously had a few Lowrey organs, and on occasions, had this problem of the organ freezing. Many thanks for your replies, and I love the Clavinova, which I use more like a Tyros/ Genos than piano.