Quoted from PatD:Thanks all. I have a feeling I'm just going to leave the PS as-is until there's an issue. Then may just replace it. Yes, the kits are cheap enough (Looks like $20 before probably another $20 of shipping is my guess.) At that point, if the nice new board is $100, I'll just swap it. I could see spending at least an hour rebuilding the PS, so not sure it's worth my time at that point.
So balls, bridge fuses, deal with the batteries in some way (Came with new lithiums, maybe I'll leave them for now until I NVRAM this sucker), and figure out my display issue. And play it like I stole it! Should keep me busy for a bit.
You seem to hung up on this NVRAM (I've had machines with and without it), but if rebuilding the PS isn't worth your time (I think you will find buyers like original rebuilt boards), in no way would I suggest you desolder on the existing MPU.
Do a remote holder or similar for $5 and be done with it.