I'm also going to say that when service techs sometimes call a "board" in the machine - especially without any real inspection - it's often not the board. The 2000 has a fuse that blows and the assumption is the board.
Now, the information I'm going to give here is from memory so further investigation is worth while if anyone does end up with this problem -> The fuse itself looked like it was likely fairly standard but it was wrapped up and inside something (check TnT Repair for more info) and I wouldn't have even suspected there was a fuse in there at all. I lucked onto it by reading one of the documents Terry at TnT had for something else. I'd gotten the machine as a batch of cheapies that were uninspected and thought to be parts machines when the Singer store in town closed. I grabbed 2 of those machines and made one good one out of them with lots of parts leftover. The note on one of the machines said "One of the boards", so I'd been planning to see which ran the best (if at all) and try to rebuild that one hoping that there wasn't the same board fried in each one. Once I changed the fuse (took the whole module/harness from the other one) - that machine test sewed beautifully. Far better than my 290C anyway.
Actually, I managed to resurrect about 80% of the machines I'd bought for parts that day. I think I tore down maybe 3 or 4 of them in total.