Gary is right about that connector. It's not just a Yamaha isolated issue though. I'll give you an example here. Alesis had the same problem with a few of their Fusion synths. Very poor connections for the screens.., that were either faulty or just not pushed in far enough. Shipping rattled them up.., and flickering screens became a problem for some. If you can..., take Gary's advice and locate a service center. Plus Steve Deming (if called upon) will help you out too.