Thanks. Sorry for the limited amount of info but I will add info along the way. Voltages are ok. I have not used the oscilloscope to see eventual fluctuations thou and a cap replacement is scheduled.
One thing I would like to understand is what could cause notes triggering. I mean: where do the "trigger note" inputs coming from the keyboard and midi in go Which chip computes the keyboard matrix and midi in signal Because i think I should start probing there...
Thanks!