Opened up the door panel to get at the control board. It had heat damage around the resistors.
Replaced it.
Trivial job, easy to get to everything.
Don't take the old board out until the new board is available, remove wires from the old board, attach them to the new board as you go.
T-20 power screwdriver/drill makes it go fast.
NOTE: the button panel is temporarily attached to the main board for shipping by a screw. Remove the screw or you will be very confused.