Resist the temptation 
and refrain from powering the console on and disconnect the battery, otherwise you risk killing the SoC.
Yeah that seems low, 3V3PDR afaict, but given the corrosion around the ENXX IC it makes sense.
Measure resistance to ground (put your black probe on the highlighted screw hole pad) and red probe at these highlighted points points and record your readings
Afterwards flux boil these two IC’s, this may take multiple passes to effectively clean… they may even require a reflow, (if they’re still working) but stick to just flux boiling for now.
Afterwards, retake those same measurements and record the results and let me know the before and after.
The Fets here can get the same treatment, If you see any other area in similar condition then you know what to do.
Check inside this connector (and others) for discoloured plastic, brown, blackened, scorched etc
