Hi, I have an Ensoniq Mr-76 vintage keyboard and recently I´ve been hearing some static-like noise through my PA system, at first I thought it was a fault in the speaker but then I tried other keyboards and the sound came out fine so I decided to take my keyboard to a technician and he told me that he coudn´t repair because the noise came from the microprocessor, what I want to know is, do any of you know if this can be repaired? or if in order to replace the microprocessor I should get one exactly the same (I mean same make, same model) or if there are other options. Please give as much info as you can. Thanks a lot !!!