M3 motor spinning even when Crazyflie is off (but battery is still connected)

[r-bt]

I have a Crazyflie 2.0. Upon inserting a battery the M3 motor immediately begins spinning, and even when I use the power button to turn off the Crazyflie the M3 motor keeps spinning. Any help with debugging steps would be appreciated

[tobbeanton]

The M3 mosfet is most likely shorted and needs to be replaced. You can find distributors of the PMV31XN mosfet here. It requires some soldering skills. On tip is to cut of the legs on the broken one, it will be easier to de-solder then.