The real problem with repairing these cards (and Blizzard PPCs) is replacing the custom memory controller chips on these Phase 5 accelerators. I have a perfectly good BlizzardPPC with a bad memory controller so 68060 & PPC work but no fast ram ergo no joy :-(
Maybe someone out there could figure out a way to replace these custom chips; then a guy like JJB could do a proper surface mount replacement.