Tyros 2 problem - help?

[Broadscot]

I have a Tyros 2 with a problem and wonder if anyone can help.    All works well on the  unit but if it is left on for about 45 minutes the entire output takes on a slight vibrato - a shimmer.  Everything still plays but this shimme is the same on all sounds from piano right through.

Is this a recognised fault of is it a setting somewhere which needs changing?

Hope someone out there can help me.

Thanks- Charlie (Edinburgh)

[Rick D.]

Charlie,

Does this happen with all Registrations or Styles?

I've been to Edinburgh, we loved it! The castles are amazing!

Rick D.

[Broadscot]

Hi Rick - yes, it's happening on everything.  Also, as of today, it starts immediately after switch on and not after 45 minutes!! I was thinking it could be something to do with Modulation wheel??  It's a definite vibrato/shimmer on the whole instrument - very strange.  I am going to try a factory reset tomorrow. 

Edinburgh is beautiful - my spiritual home.  I play church and theatre organ. I have installed a huge Hauptwerk Paramount theatre organ in my church along with the pipe organ. Still sorting out the wiring and 16 speaker channels. 

Many thanks for offering advice with the Tyros2. 
All best
Charlie