Updated: Dec 2, 2020
If a single drone motor fails to spin, here a few things to look out for.
Assuming this issue is occurring during the software calibration process, make sure "Calibrate all motors simultaneously" is checked on the software and drag the slider to the numeric value given in the instructions.
Then proceed to do the following:
Lightly touch the motors to check for any heat.
If the motor is cool to enough touch, lightly touch the ESC to check for heat. (If the ESC or motor is warm and/or hot, skip Step 1 and proceed to Step 2)
If neither the motor or ESC is warm and/or hot:
Make sure motors are plugged in completely
Make sure the ESC for the motor not spinning is plugged in correctly into the power distribution board
Go one step back in the software setup and redo the ESC calibration process carefully
If motors are still unresponsive, proceed to Step 2 below.
If the motor and ESC are warm and/or hot, proceed to do the following:
Stop the calibration process (Return the slider down to its starting position).
Unmount & unscrew the motor from the frame while leaving everything else connected
Move the motor slightly off of the frame and place it on your table/work bench
Ensure "calibrate all motors simultaneously" is checked
Proceed to continue with the motor calibration process following the instructions on-screen.
If the motor spins after doing the steps above, that means the mounting screws were over-tightened.
Next step is to move the "motor calibration" slider back to its starting point on the software and p