I'm only guessing, but so far the only thing I can think of is when I tried to hook up the 21 ras pi that is where the driver power state failure happened and the blue screen from that event is what might have? caused the corruption of the files or just the wallet data?
If you pulled the power from the raspi and then took the wallet file off of it afterwards, that could have caused it to become corrupted as the database is still open and there are other files that you need when the wallet database is still open.
Have you tried just powering on the raspi again and seeing if you can access the wallet there?