HS100 one motor won't start

[MarcK]

My HS100 hit a bush while landing. Now when I go for take off, 3 motors will start to rotate and then shut down. One will not rotate at all. It is a "A" motor and I switched it with the other "A" motor. It doesn't seem to be the motor because the switched motor does the same thing, it is what is driving that motor in the front left position on the drone. Any ideas? Thanks

 

[tester73]

If the motor is good, check the wires from the motor to the board, soldering on the board. Another problem may be in the motor control transistors.