Mosfet testing for short from youtube repair video
A higher than logic level voltage switch (e.g. 19V charger) using a high side Pch switch needs a level shifter to pull down the gate pullup resistor the Pch gate.

The voltage Nch switch might use a logic level to pull down it’s drain with low current as a level shifter.

Since each FET inverts changes in voltage from Gate to Drain, the 2 stages form a non-inverting high side switch .  

Measuring voltages powered on is the best way to detect if the FET is OFF or ON or shorted by trying to turn it off by shunting the Vgs below threshold with a 1k resistor safely or visa versa from gate to drain.