One rotor on my Lotus T380 won't turn

jlemoo

Member
I have a Lotus T380 and one of the rotors won't turn. I thought it was a bad motor, so I replaced it, and I still have the same problem. The other three start up and the fourth moves slightly and then quits and then it produces a humming noise until I unplug the battery. Do I need a new speed controller?
 

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