Hi,
I would swear that the first thing I did when I saw the issue, I swapped the fader with another one, but I did not do that, because I swapped it this afternoon, just in case, and the problem it is gone. So sorry for writeing my issue in your thread, I was sure that it was a similar issue. Did you recap the 82E20 card? Did you check all ICs and diodes of this card?