@chrishamm so I tried the new mosfet board and that still didn't affect whether or not the berd air motor was running. I was getting several DCS stopped errors too. I got logging enabled again, only to see bad CRC32 warnings appearing in the console. When it started to print, I got a warning that phase A in one of my motors was disconnected. It's a good thing I got the warning, since I have a triple axis bed and that would have collided otherwise.
I didn't touch the motor at all, and it definitely is connected. The ribbon cable is the same one that was seemingly working too. Could this somehow be related to the mosfet board? I didn't try the one that was causing a constant boot loop yet, but perhaps that would give us more info? Could this fan output be somehow messing with the rest of the board?