820-00840 20V, 0A

[yair37]

Clean board, 20V 0A after 5sec that i connect the charger i can see 20V 0.3A for a 1sec and back to 0.03A
PPBUS_G3H 13V
PP3V3_S5G 1V-0V PULS
PP3V3_G3H - 3.41V
PM_BATLOW_L 3.3V-0V PULS

 

[2informaticos]

PPBUS_G3H always steady 13V?

Try first the SMC bypass.
Possibly fault in a secondary supply; check diode mode on all big coils.
Test the board alone on the desk, nothing connected.