820-01700 20v 0.03 amps

[JdYoda]

Hello everyone. I got a Mac a2141, with massive board damage by wine. PPBUS was shorted. Removed CA780, C9573, C9574. Short is gone, PPBUS is back to normal value.

Now there is 20v on charging ports, 0.03 amps

PPBUS 12.6V
PP2V5_NAND_SSD0 2.5v
PP1V8_G3S present
PP5V_G3S present
PP3V3_G3H_T present

SLP2SR signals is present
AWAKE signals is present

pp3v3_s5 is missing. Not shorted (0.33 in diode mode)
Changed U7800 - no effect.
Tryed to restore with Apple Configurator in DFU - it ends up with an error

There was a bit of corrosion around U1200, just for case changed resistors R1530, R1511 and R1941 because it wasn't looks good.
Is it possible that U1200 is damaged and pulling pp3v3_s5 to the ground?
I don't have a stencil for that chip, so don't want to take it off the board for now..(((

 

[2informaticos]

You've said no short, nor low resistance to ground at 3V3_S5.
But corrosion underneath PCH can block the board, of course.

 

[JdYoda]

Took off the PCH, pp3v3_s5 is still 0v

 

[2informaticos]

I said possible corrosion.
Needed to heat PCH with quality flux; just to burn eventually accumulated crap.

However, if DFU wasn't completed, there is a problem related with T2, or SSD.
If you have luck, maybe some components around T2.
Also possible damaged T2 data lines, because of liquid spill.

 

[JdYoda]

Yep, reballed PCH, still no changes. Will try to restore one more time in DFU. But looks like this board is dead (((