Customer continues to refuse to use the forum, despite being directed here. They state:
Why is it the adapter board is plugged into the same plug that feeds that board I sent back, and the adapter board works perfectly.
I would hypothesize that the improperly crimped/improperly seated pins in the connectors you crimped make contact sometimes, but don't make contact other times. Regardless, as you can see from the photo I posted, the scanning Z-probe powers on and works.
Customer further states:
Will you send it back or send another one?
Well, definitely can't send a new one since the old one works as shown. But if you'd like, can send an order checkout link for shipping costs of sending this back to you. Can't keep covering shipping costs on warranty claims of non-faulty products, though. Let me know if you'd like the board back and I'll send that link.
Or if there's any other tests to be done first, happy to do those @droftarts @Phaedrux