820-01521 20V wont boot

[ajdoc]

Board had small liquid damage on C8101 (PPBUS was shorted, replaced cap and there is no short). U7210/30 are affected by liquid as well.

Detected in DFU and restore done without any errors.
No chime, no light on caps lock.

Board only connected to charger have 20V and 0.08A (CPU get lettile warm)

PPBUS_G3H 12.58V
PP1V8_SLPS2R 1.79V
PP1V1_SLPDDR 1.1V
PP1V8_AWAKE 1.79V
PP3V3_G3H_RTC 3.26V
PP3V3_G3H 3.28V
PP3V_G3H 2.99V
PP5V_G3S 5.10V
PP3V3_G3S 3.29V
PP1V8_G3S 1.79V
PP1V8_S5 1.79V
PP1V8_S3 1.79V
PP1V2_S3 1.19V
PP2V7_NAND 2.52V
PP1V8_SSD 1.8V
PP0V9_SSD 0.91V
PP3V3_TBT_X_S0 3.29V
PP3V3_TBT_X_SX 3.26V
PP1V2_S0SW 1.19V
PP1V_PRIM 1.0V
PP1V2_AWAKE 1.2V
PP0V82_SLPDDR 0.82V
PPVDDCPU_AWAKE 0.54V
PPVCC_PRIM_CORE 1.0V
PPVCC_S0_CPU 0V


Any idea?

 

[2informaticos]

Check diode mode to ground on all big coils.
Compare readings with good board.

Did you test the board alone on the desk?