Patches and discussion for Ensoniq VFX family

I haven't been able to play my SD-1 32 Voice for several months.  It was 
stored, safely in a corner, in my home and previously sounded and 
operated beautifully.  Fired it up today and now suddenly the audio 
output (main/aux/phones) is distorted on every patch, also makes ugly 
digital glitches when selecting sounds, and the volume slider now only 
acts as off or full volume (no levels in between).

I have tried a hard reset, different amps, different power outlets, 
several cables, powering it up several times repeatedly, and 
disconnected the sustain pedal, all to no avail.  It just up and decided 
to whack out on me.  Any suggestions would be more than helpful and 
totally appreciated.  Thanks!