Patches and discussion for Ensoniq VFX family

Hey everyone.
I have an SD-2 32Voice that I've had for what seems like hundreds of
years, and with the exception of little glitches every now and then,
it has always served me well. Recently however, it plays one note (c5)
sporadically and intermittantly. That note is unresponsive when played
at the keyboard. I have reloaded the Sequencer OS (4.00) and have even
gone so far as to Reinitialize, but to no avail. Has anyone
experienced this, and does anyone have any ideas? Thank you in advance.

Kenneth