820-02100 M1 Pro Coffee spill

My reference only: TT10141
History: Coffee spill. Lot of damage around UP800, U9300. There is a lug at the bottom left corner of resistor RP860 that is missing. No documentation on what this is for. Q5240 had looked like it had damage.
Current issue: I plug in the USB-C meter, it goes to the normal 5v, then goes to 20v, stays there for about 10 seconds, then the USB-C meter reboots and it just keeps looping doing the exact same thing. The voltage appears to being pulled down.
What I have done so far: Replaced the following: Q5240, U5200, reflowed U9300 and UP800. The following capacitors were burned and replaced: CW186, CW1A2, C9406, CW187, CW194.
I removed F5200/01 to isolate, and the problem is on the PPBUS_AON side. I stuck back on both fuses.
PP1V8_S2 is present. PP1V2_S2 is present.
PPVIN_P1V8VDDH goes from 12.31v then drops to 12.01v, then drops to 6v, then loops this same thing.
RP805 has 5v.
PPVIN_P3V8AON goes from 12.31v then drops to 12.01v, then drops to 6v, then loops this same thing.
P3V8AON_PWR_EN goes to 4.78v for about 10 seconds, then drops to 0, and loops.
PP3V8AON_PH2 stays at 3.792v for about 10 seconds, then drops to 3.5v, and loops.
Not sure what else to look at.

There must be more problems caused by liquid.
Possibly corrosion under BGA chips.

An overcurrent detected on a secondary power rail may also restart the board.

I think U9300 could be a culprit. I removed it and USB-c was read 5v, but PPVIN_P1V8VDDH_CTRL_VIN was stable at the 12v having removed U9300.
Got U9300 back on and I am getting the same reboot looping.
Testing R9330 and it seems a little low 1.195v to 0v looping.
What exactly does the Viper Controller do?
Oh, now with the U9300 back on, PPVIN_P1V8VDDH_CTRL_VIN is starting out at 12.25v, then drops to the 12.0v, then drops to 0v and reboots.

Update: I replaced U9300 from a donor board and no change.