[A6] Mix Mode Patch tweaking

[M.G.S.]

Hi List :

Well , finally it  all happened to me.
Symptoms :
The A6 's display begins to change pages at random, it seams
as if trying to find the right settings for the given voice/patch.

Sometimes , just touching the keyboard triggers these changes,
same thing with the pitch/modulation wheels.

What's happening to my A6?
Wrong settings in Mix Mode /patch tweaking?
Corrupted patches?
Hardware problems inside (loose cables?)
Do I need to send it for repair?? Hope NOT!
(Makes me think there's  a little bug  running around inside)
Master/Midi clocks  setting conflicts?
Etc. , etc. , etc. . . .

Possible Troubleshooting Chart points that refers to my particular problem :
Unit responding strangely , Mod/Pitch wheels not working as expected .

Power Up Modes , with the exception of
soft button 6 ,7 and 8 , do not help my problem at all
The Pitch wheel triggers the Auto Tune , Pitch , Clock , Portamento ,
Oscillators  and Ribbon Controller LED's  light  intermittently.
Ribbon Controller works only partially.

Any help will be greatly appreciated.

Best Regards :  Max