Patches and discussion for Ensoniq VFX family

Hello all, I am possessor of a VFX sd, I encounter a problem when his 
ignition, the keyboard tells me first of all the usual "Calibrating do 
not touch" and then to "keyboard is not responding" the keyboard does 
so well, everything is blocked ... That is the situation, if you have 
any ideas, suggestions or knowledge repairing such errors, I would be 
more than happy! ... A big Thank you to those who can answer me ...