This is sounding more and more like a problem with the Provari board. You're not getting normal error messages which should pretty much cover all problems you might incur in the normal range of operations. You have thoroughly tested and checked out your Kabukis and eliminated them as the source of the problem, and you have checked and tested your batteries and know they are working correctly. You have cleaned and checked your internal connection points.By luck I got a secondhand Provari mini a couple of months ago and a Kanger Emow Mega.
Nothing like using the Kabuki in terms of flavour and it leaks...
I have the P3 adaptor for the Kabuki but it will not work on the mini?
I persuade a friend to buy a P3 after I got one and tested both Kabuki's on his P3 since mine packed up yesterday and they work so no problem with the tanks or coils.
Thanks again. Sean
There's nothing else left to diagnose, it really looks to be an internal problem with the P3. I see a long journey back to the States in its future, sorry.
But kudos for a brilliant job of testing all possibilities of failure before submitting a help ticket. This is when it's nice to have a back-up Provari waiting in the wings, so it looks like it's time to put that mini to work.
If your mini is one with the upgraded top cap you should be fine with the Kabuki, but if it's the slant top you will need the 510 connection.