You know I think one of those stupid switches on the door that open when you remove the cover cuts out common to DCL & DOL. Do you have a watchdog LED on the board? There are quite a few pick fuses on that board. Did you say if it runs from the manual buttons? And you’re saying you can’t talk to the door board directly with a FAST tool? Because the controller does not have any comm with the door. You are probably not going to get the same board for a replacement. There’s a whole upgrade kit with a new motor, a wiring change and an ABN board with UIT. There actually aren’t many of the old GE boards left.
FCP command will tell you if your floor table is still there. I honestly don’t remember what the position count does while running the car on inspection though.