Hi Jeremy,
From my reading of Russ’s OP and previous posts, I’m pretty sure it is the microUSB Power Connector on his Pi3B that he is actually talking about (though I could be wrong).
Russ,
The motherboard used and recommended by PilotAware is still the Pi3B. It will ‘run’ on a Pi3B+ (I have run one as a testbed since they first came out), but this is still not ‘recommended’ and at the present time PAW definitely won’t run on a Pi4. Enabling it to do so is (AFAIK) not on Lee’s ‘to do’ list (or if it is it’s very low priority), as they are way over spec for what we need the board to do and (as Ian has said above) draw far too much current, which has a negative effect on the peripheral equipment in (most) light / Microlight aircraft.
That said, Jeremy does a good deal on replacing the microUSB on existing Pi3’s (he did this for me when one of my original 3B’s went bad a while back, so I can definitely recommend him if you want to go down that route).
Best Regards
Peter