820-00840 - NO PP3V3/5V_S5 - 20V/0.04A - PP3V3_S5 Shorting

[it-solve]

Got this board with small amount of liquid damage around U7650, a quite similar case to @CRC2018 - 820-00840-a Wont start missing PP5V_S5
Another area which had some liquid damage was C3403, which seems a bit corroded but still makes good contact.

PP3V3_G3H - 3.3V

PP5V_S5 - 0V - 0.43Vdc
PP3V3_S5 - 0V - 0 Ohm - Short

U7650
PIN4 - 0V
PIN12 - 0V
PIN13 - 0V
PIN21 - 0V
PIN22 - 3.3V
PIN29 - 0V

PP5V_LDO5V - 4.89v
PP3V3_LDO3V - 3.18v

PMIC_EN_P3V3S5 - 0v - 0.46Vdc
PMIC_SHUTDOWN_L -3.17V - 0.48Vdc - R7828 present, /29 not present

SMC_PM_G2_EN - 3.40V - SMC seems ok?
BUF_SMC_RESET_L - 3.40V
SMC_WAKE_L - 3.12V
PP3V3_S5_SMC - PP3V3_S5_SMC_VDDA - 3.408V
PP1V2_S5_SMC_VDDC - 1.19V
R7883 is fine

PP3V1_RTC - 0V - 5 Ohm

Could this short be caused by a bad PMIC? Any suggestion what else I can check on it?

 

[2informaticos]

Short on RTC can be caused by PMIC, or PCH.
Find the culprit which causes short on 3V3_S5 first; could be just PMIC.

 

[it-solve]

How would you advise to go with this short? Can I inject in there?

 

[2informaticos]

Should be safe to inject, no more than 4V.
Start with 1V and go high slowly, if needed.
Unfortunately, no idea about the ohm value of that short...

 

[it-solve]

Aaah had the same working board 2 hrs ago could have measured it.
Thank you again

 

[2informaticos]

The short is in the actual board...