A1398 820-00163-A loop

[hgoncalves]

Hi,

I have an A1398 820-00163-A that keeps rebooting on the Apple logo. With the trackpad disconnected, It goes to the login screen.
I´ve already replaced the keyboard, trackpad and cable, but with the same result, witch seams to indicate that is something related with the board.

PPBUS_S4_TPAD diode reading is 0.529.

PPBUS_S4_TPAD = 12.5V

Can you help?

 

[2informaticos]

Check with known good battery and original 85W Magsafe 2 charger.
Also test with external macOS.

Same thing happens booting into safe mode?
No errors pop up into diagnostic mode?