MacBook Pro (13-inch, 2016) - 820-00239 - No power after liquid damage

[ronaldo]

Hi. Could you help me, please?
This mac came from a customer that took it to a previous shop and they cleaned the board, and I can't tell for sure where was the liquid corrosion.
There were signs of corrosion near UB300, U7210.
After replacing U7800, U7220, U7210, C7224 it started to get 20V and fan spinning. But the CPU is very hot, more than normal just after plugging the cable.
CPUCORE_PWM1 - Pin 1 - 0.47V instead of 2.2V
CPUCORE_PWM2 - Pin1 - 0.47V instead of 2.2V
PPBUS_G3H - 13.02V
PPVCC_S0_CPU - 1.04V
PPVCCGT_S0_CPU - 0V
PPVCCSA_S0_CPU - 1.04V
PPVCCIO_S0_CPU - 0.95V
CPU_ZVM_L - 0V

 

[2informaticos]

PPVCC_S0_CPU should drop to 0.6V aprox, when board really boots.

You may have knocked off components.
Just in case, try known good BIOS.

 

[ronaldo]

Tried 2 other bios chips and firmware.
Inspecting the board doesn't seem to have any missing components.
There is any way to find out why the PPVCC_S0_CPU is not dropping to 0.6V?

 

[2informaticos]

Missing components, or corroded (traces too).
Bad CPU, or accumulated crap underneath CPU, or RAM.