Hey,
(Take all this as constructive 
) You seem to be conducting your dianosis in a backwards manner, your randomly checking things on the board, your using diode mode, your trying to dianose things when you don’t even know what the thing is, Your checking every single pin of a given IC etc etc.
You need to start from a framwork that’s top down and then hone in from that. So, instead of checking random things all over the board, instead, check the most primary rail on the machine, then start checking other primary (sub) rails, where you can typically see, sub sub rail issues which can then narrow down things further
Check this topic here
and this one,
Would be indicating you have USB/M92 issues (or some other USB related circuitry) or that you have a short on SYS or some other closely linked rail, a large majority of which can be ruled out by checking the rails mentioned in the previous topics 
I would be checking continuity from USB to destinations (via USBC Breakout board) following checking of all rails.
This is no good man, I’d order up some more IC’s (from legit source like Mouser) and replace this properly less you potentially cause damage elsewhere on the board.
Hope that helps.