MacBook A2485 / 820-02100-11 board / Logic Board Failure

[zeydullak]

Hello,

We have a A2485 MacBook that has logic board failure. Customer says there was not water damage. He said screen went black while he worked. We removed the board. There are 3 USB C ports. When connected it shows 5.26v and 0.22a and restarts. Looks like it detects something and restarts. I think we see when it just shows 20V, it restarts. USB C Meter turns off and on. Can you please advise what elements we should check? We also have working donor board.

Regards,
Zack

 

[2informaticos]

Magsafe port has the same behavior?

 

[zeydullak]

5v and 0a and then it restarts.

 

[2informaticos]

Remove both F5200/1 and check C5250 voltage.

 

[zeydullak]

C5250:1 -> 4.475
C5250:2 -> .013

 

[2informaticos]

Did you really check for voltage on its ground pin???
I don't see the logic...

Confirm if you checked voltage, or diode mode.