I now have several good boards and several lcs. I managed to completely rebuild two flawless PB 100. Now I have some recapped logic boards and 4 lcd: 3 blacks and 1 good (but with a colums of dead pixels due to a crack in a corner). The 3 black lcds stay black with any logic and the good one is fine with any logic, so it must be something in the lcd circuitry. In my testing i am using the same inverter stuff, I swap only the lcd panel.
Awesome find! Glad it made its way to a collector rather than a landfill.
The book "Revolution In The Valley" is all about the making of the original Macintosh, written by much of the team, most of which has been posted to folklore.org, so here's a relevent story about them switching from the Twiggy to the Sony drives
Whole site and book is worth checking out