Yamaha P105 issue

by Renee
(Virginia)

I have had my P105 for almost 6 years and play mostly organ and piano sounds in a classic rock band. Recently, when I use the Pipe organ or Vibe settings, they seem to get stuck and will not turn off unless I reboot the entire machine. It only happens sporadically, but can be quite distracting in a live gig. Anyone know why this happens?