Nintendo Switch doesn't power on

Hello everyone,

I have a problem with my switch, it doesn’t turn on anymore. When I put it on the docn, the led blink one time and then nothing.

I put the broken motherboard in a functional switch but same result, but the switch turn on with the functional motherboard.

I check short circuit around the ICs M92T36, P13USB and BQ24193 but everything looks good.

What other check can I do?

Thank you.