liquid damage 820-01814 A1990 stuck at 20V 100mA

[jadao]

I have a Liquid damage board around U7230, Power button, U9000 and U9080 areas.
Cleaned all corrosion (minor) and replaced R4922.
20V on usbc meter with 100-95mA on all ports.
With battery current draw is only 500-700mA however battery seems a little bit inflated...

P1V1SLPS2R_FB 1.1V
P1V1SLPS2R_SW0 1.1V
P1V1SLPS2R_SW1 1.1V
P1V8SLPS2R_SW0 1.8V
P1V8_SLPS2RSW_DFR_R 0V
PP0V8_SLPS2R 0.8V
PP1V25_SLPS2R_SMC_AVREF 1.25V
SOC_RED_SLPS2R NC

PPBUS_G3H 12,56V during 14 secondes and 12,32V during 4 secondes
PP5V_G3S 5V during 14 secondes and 3v during 4 secondes

PP3V3_G3H_RTC_X 3,3V
PP1V8_G3S 1.V
PP3V3_G3H_RTC_REG_R 3.3V

It enters DFU but no revive neither restore worked.

No idea what to check, I am also going to try with a another battery if i recall this model needs a battery in order to boot...

 

[2informaticos]

Apart of 3V3_G3H and 5V_G3S, do you note voltage (or pulse at least), on any other big coil?

What about SSD voltages?
Pay atention to U9080 side.

 

[jadao]

Hi 2informaticos,

3V3_G3H is steady 3.3V , PPBUS_G3H 12,56V during 14 secondes and 12,32V during 4 secondes, PP5V_G3S 5V during 14 secondes and 3v during 4 secondes

Only L7030 CHGR_PHASE1/2 8.6V during 14 secondes and 11,2V during 4 secondes
No other voltage (even a pulse) appears in any other big coil.

As per SSD voltages they are all missing
PP2V5_NAND_SSD0 0V, with 0,50 diode mode
PP0V9_SSD0 0V, with 0,250 diode mode
PP1V8_SSD0 0V, with 0,384 diode mode

I replaced U9080 where i found a little bit of crap under but nothing changed...

 

[2informaticos]

Reflash SoC ROM and try again DFU.
You can also try just erasing it.