820-02773 - A2338 M2

[Mineccia15]

Hello, got this MacBook for data recovery and was not water damaged.

The usb-c amp switches to 20v and than reboots in a loop. Both the port have the same behaviour.

Not able to but it in DFU.

Kind of new model and don't know what to do or what to check.

help please

 

[2informaticos]

Did you test with charged battery?
Does it reboot instantly, or after 10-20 seconds?

 

[Mineccia15]

I have 2 test battery, don't know if they are charged. but does not seem to work.

The reboot is instantly

 

[2informaticos]

What about PPBUS_AON and 3V8_AON behavior?
Also check all secondary power supplies for pulse/short.

 

[Mineccia15]

Aon goes 12.35 to 12 to 0V in a loop
3V8_AON between 3.2/3.4V
which secondary power supplies?
Can't find any short

 

[2informaticos]

"which secondary power supplies?"
Check pages 28-46; there are many...