i have a nintendo switch that will not power on. from what i understand, this device came into contact with water. after looking inside i saw no standing water or major signs of corrosion. i did see some white substance but have seen much worse on a working console. i have tried a known-good battery and using an amperage meter i can see that both known-good and the original battery are drawing a healthy charge. i have also plugged in a new screen (without fully installing it) to confirm that it is not simply a screen issue. i have tried replacing the chip on the back (labeled MAX---) with no luck.

any pointers here would be greatly appreciated