820-01521 - restarts at the Apple logo

[Palhano]

It turns on, the Apple logo appears, it starts loading the system and then restarts.

The only thing I noticed is that the MOSFET (Q3200 or Q3100) connected to the port where I plug in the charger is frying. I replaced both and the problem persists.

Any suggestions?

 

[2informaticos]

Did you test with known good battery, holding some charge?
Still restarts with battery alone?
Can you force it in Recovery mode?