WD is lit... is "VBUS" LED lit?
If you have 115VAC at CON 11 pins 1&2 and the VBUS is not lit- time for a new card.
Check to be sure the door motor leads are secure in their terminals. There is also a fuse on the card (of which I'm sure you checked already). And again- the brushes are good correct? I only ask again because I didn't see you address the physical condition, but did perform a test between them.