MacBook Pro A2141 820-01700 - stuck in 5v drawing 420ma

[survivalbloke]

This laptop is stuck at 5v(all four ports checked) and exactly 420ma current draw. I checked PPBUS_G3H @ F7000 P2, and get ~8.76v where I should have 12.60v-12.65v. I checked resistance to ground @ F700 P2 and got an instant 0 which was odd. I applied 1v5a @F7000 P2 and have no draw, indicating no short.

I'm very confused. Send help.