Thanks for the reply Marty. I've looked at that pinrepair guide many times, it's fantastic and has been very helpful.  I feel like it might be a power issue. Maybe at or around the transformer?
The VUK coil sleeves and one of the coils are new.
The display blacks out in random spots. It's more like a fading out, and at its worst half the display will fade out.
I've checked and reseated the connectors to no avail. I think I"ll eventually buy a new DMD as I think this one has seen better days, but I'm not sure what the problem is with the VUK's.