820-2530-A works only on adapter

[vsa100]

Hi!

I have this 820-2530-A that works perfectly but only with adapter.
Tried with 2 known good batteries.
Battery is correctly recognised by the system and apps like coconut.
Inspected the board and is very clean, no water damage at all and i can't see anything burned.
Where you suggest to start?

Thanks!

 

[2informaticos]

Post Q7050 voltages with battery only, not charger.
Do you get 3V42_G3H in this case?