found exactly same issues on this two similar board which are not charging.but board run from battery alone even charger alone.just not allow charger when both charger and battery connected.it run from battery if battery has charged when battery and charger connected and not allowing 20v.replaced so far ISL.type C from donor board and exactly same positions.all data line is fine and have voltage,waveform on OSC.
any idea?
any idea?