820-2936 cpu vcore stuck at 1.1V

[Kyle93]

Have a 820-2936 that had mild water damage. Board now turns on but cpuvcore hangs at 1.1V

What to check/ try first?

 

[Kyle93]

Spill was just around lcd connector area.

Tried good ram one module at a time.

r7402 already has the correct value.

No corrosion around SPI u6100

Tried new bios and SMC but still same problem.

What to check next?

 

[2informaticos]

The PCH could got damaged by liquid.
Check all the lines which go from LCD connector to PCH; diode mode to ground.
Could also be a simple resistor, or even CPU.
Just in case, use good flux and heat PCH and CPU.
Be sure to get 25MHz from pin 9 of U2800.