820-3332 no power

[iClub]

Hey, buddy, that mac has no signs of oxidation, it doesn't spin.


Voltage: PPBUS_g3h 12.59V; PP3v42_g3h 3.42V; PP5v_s0 0V;
I hope these voltages help you understand the defect.

 

[2informaticos]

Do you get 3V3_S5/SUS?
Are you using original 85W Magsafe charger?
Post PM_BATLOW_L.

 

[iClub]

PP3V3_SUS 3.34v
PP3V3_S5 3.33V
"Are you using original 85W Magsafe charger? '' yes, original.
PM_BATLOW_L 3.30v.


Mac accepts PRAM reset, but has no image, cooler rotates normally.

 

[iClub]

Is it the classic GPU fault?

Mac reads the external SSD.

 

[2informaticos]

Looks like you have dificulties to explain the symptomps of your boards.
You tittled "no power" and said missing 5V_S0.
Now the fan spins, machine is on, has even USB activity.
How can we help, if you do not provide accurate information???

Hardware mode to disable GPU on this board, has already been posted on the forum.
Just in case, resolder U8900 first...