Macbook A2251 820-01949

[ipetro]

The MacBook does not boot.
It is restored via DFU without errors.
The MacBook charges and consumes 20V/2A.
without battery the board consumes 20v\0.233a
The caps lock does not light up, but the touchpad clicks.
The fans do not rotate.
No signs of life
PPBUS_G3H=12v
PP3V3_G3H=3.38v

 

[2informaticos]

Check diode mode to ground on all secondary power supplies (big coils first).

 

[ipetro]

L7030=0.472
L7660=0.413
L7600=0.398
L8410=0.791
L3500_VXT=0.468
L3500_VWR=0.465
L8100=0.038
L7210=0.053
L7220=0.054
L7230=0.054
L9030=0.320
L9020=0.298
L9080=0.381
L6900=0.348

 

[2informaticos]

Which big coils get voltage?
Check for pulse at least; when pressing power button.

 

[ipetro]

L7030=11,93v
L7660=3.38v
L7600=5v
L8410=0
L3500_VXT=0
L3500_VWR=0
L8100=0
L9030=1.8v
L9020=0.9v
L9080=2.5v
L6900=3.38v

 

[2informaticos]

Any history available?

 

[ipetro]

the macbook has not been used for a long time, which is why the battery has swollen and the mac did not charge and did not work. I replaced the battery, it started charging but did not turn on. I checked if it was in DFU and it was in recovery! It recovered without errors but does not show any signs of life. Without a battery, the consumption rises to 20v \ 0.570a and then sharply drops to 20v \ 0.230 and stays there! The board looks perfect, no one opened it before me, there are no traces of spillage inside, although it seems to me that liquid got on the keyboard, but everything is perfect inside