One motor continuously spins

[blork]

Hi, My son has a L6060 quadcopter and he crashed it into the ground the other day and now one of the motors spins as soon as power is applied (the battery is connected) even thought he power switch is off. The other three work as expected. I have looked around and some of the forums say that it may be one of the transistors on the PCB that is broken. Has anyone elose had this issue and would replacing the PCB work do you think?

thanks

Brian

[RC Enthusiast No.1]

Check if there is any problem with the circuit connection.

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