820-02536 5v liquid damage

[yobad]

Hi all, hoping for some fresh eyes on this one. Here's everything I've measured so far.
Symptoms
USB-C meter shows the board stuck at 5V, from 0.02-0.04 A
The board is very clean.

The lcd backlight flicker/flash when i plug charger.

PP3V3_S2_LDO is not reaching 3.3V (reads low). PPBUS_AON is cycling (not holding steady) rather than sitting flat at ~12V. PP1V8_AON is unstable, and its instability timing matches the PPBUS_AON cycling period exactly.
On the oscilloscope, I'm seeing square-wave drops (not steady DC) on several rails at once: PP3V3 (system rail) PP3V3_UPC1_LDO PP1V5_UPC1_LDO_CORE

I replaced main pmic, all usb c chips + rom.
Also u5200 is replaced.
Thank you for your help

 

[yobad]

I found the issue UP700 was shorted.
Replaced it, now i get 20v
But i think it is cycling, the USB C meter is restating every 3 sec.

 

[2informaticos]

Check the behavior of all secondary voltages.