Help diagnosing DEAD APU nintendo switch

Hello, how I can tell for sure that APU is dead? There is any measures I can take? No power on, no charging battery

here my measures

Dont you get any Power draw? Can be a Bad fuse

Fuse it’s pretty good. It does draw 5v, but no charging

What you mean by that? How much amps does the board draw when you pluged in a good battery and a charger?