Thanks for all the replies
The A2000 doesn't boot, nor does the A3000. I opened up the A2000 and saw that the battery had leaked and affected the mother board and the 6880 (???) socket and chip. So far I have done nothing about this. I've yet to inspect the guts of the A3000.
I'm considering digging out some old scrap PCBs and practicing working on them, specifically re-learning how to pull socketed chips, desolder sockets and other components, replace corroded traces, and seal the new traces with epoxy. If I have luck with that learning curve, I may opt to try to do the repairs myself -- but at this juncture I think that unlikely.
I may postpone for a year or so my sale of these computers. I'd much rather sell working computers than non-working.