820 3787 - Don't turn on - Green light

[Noguinfor]

Hey guys,
this one came with no green light and with battery the machine turn one! Using my DC power suplply i noticed the U7100 a little hot. Replace the isl and green light appear!
Now i have 3.7V o PPBUS! Already replace 2 times the ISL for a new one! and i need to replace R7151 and R7152.
i have 4.9ohm on c7150 and 22.8ohm on c7150.

I don't want to touch in other components without certainties!

any advice are welcome!

thanks

 

[2informaticos]

Did you try SMC bypass?
Are you using original 85W charger for sure?
Post some voltages for U7100; pins 1, 2, 3, 12, 13, 9, 15, 19, 20, 26, 27.

 

[Noguinfor]

Yes i'm using a original Charger 85W. And not start in SMC byass!

U7100:

pin1 - 0V
pin2 - 16.41V
pin3 - 3.89V
pin12 - 3.42V
pin13 - 3.39V
pin9 - 0.03V
pin15 - 0.054V
pin19 - 5.52V
pin20 - 5.53V
pin26 - 14.74V
pin27 - 20.14V

 

[2informaticos]

On battery only, OSX recognizes battery percentage?

"pin26 - 14.74V"
Too low for 85W charger.
Be sure all R7120-22 are good.
If charger is really 85W, then change Q7180.

 

[Noguinfor]

Ok it's Working!
This one ended my resistors 10ohm off my pile!
Needed to replace the resistors + u7100 + Q780 at once!

Solved! Ty Mr.Vali one more time