Good News. I had a thought that it might just be fluff or dust and got the vac cleaner and vacced around the wheel and gently turned it back and forward. I thought nothing had changed. When I started it up again a few hours later, the wheel worked perfectly. The owner had not used the keyboard for a couple of years. It just proves the old saying is true -USE IT OR LOSE IT.This also must apply to keyboards. Would it be a good idea to buy a spare if still available. It renders the keyboard pretty useless if it fails.Thank you Bill and John for the advice and lead.I am now a happy 7000 player. I will still hang onto my 6500 to take out to play. The 7000 is too heavy and will always stay home. I call it Cinderella. Cheers. Jean.