820-01041-A With liquid damage It does not turn on

1phone.cl

Member
I already reviewed the entire sequence and I have some doubts with these lines
P1V1_SLPDDR_SOCFET_EN 1.8V
P5VG3S_EN 3.3V
P3V3G3S_EN 1.8V
P5VG3S_PGOOD 1.8V

All voltages are present up to the PMU_ONOFF_L line.

When the power button is activated, the voltage of the PP3V3_S5 line is not generated
 

2informaticos

Administrator
Staff member
Always when have doubts with signals, check where the pull-up resistor is connected.
Usually enable signals are 3.3V; sometime 1.8V, because corresponding chip is powered from 1.8V too.
Same applies for power good signals.
Don't make confusion between a power rail and its enable, or power good signal!!!

I still bet for SSD damage and T2 can't complete DFU because cannot access its firmware partition.
 

1phone.cl

Member
What can i do now?
I want to try everything possible.
I've already checked all the bad sectors many times and I've checked all the voltages and resistors and I don't care if the board dies in the process but I don't want to give up please
 

2informaticos

Administrator
Staff member
Liquid damaged board is many times a nightmare and lost cause.
We cannot choose which part want to be affected.

Try to put the board in ultrasonic bath.
Dry it correctly at the end.
 
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