Liquid 820-00850 3v3_g3h blowing charging chips

[Zeifurhugen]

Hi,

I have a liquid damaged 820-00850.

I had to replace U7800, U8250, U3730 and UB000 to clear all of the short circuits from the liquid damage.

I replaced all 4 UCB-C Charging chips (UB300, UB400, U3100, U3200)

After replacing all 4 charging chips I plugged the device into power and immediately all 4 charging chips had their PP3V3_G3H lines blown out and read as short.

I had to remove all 4 charging chips to clear the short on PP3V3_G3H_RTC.

I have tested every single pad underneath each charging chip and there are no short circuits.

I am mainly looking for assistance in trying to determine how and why this 3v3 line keeps blowing all my charging chips. I have used almost 10 charging chips trying to fix this board and troubleshooting the board with charging chips installed just leads me to wasting charging chips.

Any suggestions would be greatly appreciated.

As always, thank you for your time!

 

[2informaticos]

Looks like hopeless project.

Probably corrosion on U6903 area; check all R6910-13.
May need to change U6903 too.