Nintendo Switch won’t turn on; draws 200mA of current.

No power. Requires 15V @ 0.2A. Long-pressing the power button might trigger a “shutdown” state, causing the current to drop to 0.1A.
It might even respond to a restart attempt, with the current rising back to 0.2A.
Won’t turn on.
Requires 15V @ 0.2A.
Long-pressing the power button might trigger a “shutdown” state, causing the current to drop to 0.1A.
It might even respond to a restart attempt, with the current rising back to 0.2A.
The issue might be the PI3USB.