Good day @Widodob,
Does this still happen after re-calibrating the ESC's? To do that (with everything connected, board, ESC's, etc. and the propellers off):
- With the brain powered off, power the controller on and set the throttle to the max.
- Power the copter (brain+board) on and wait until you see the orange and blue LED's flashing alternatively.
- Power the copter off and on again and wait for the same alternative flashing.
- Pull the throttle all the way down, you should hear some beeps (depending on what battery type you are using 3-4 beeps). If at this point you push the throttle up the motors should power on, although at this time there's no thrust control.
- Finally, power the copter off and (with the throttle down) on again and wait for the orange LED indicating that the autopilot is ready.
Does, after all this, the behaviour change? If not, is it the ESC or the motor that's giving you problems?
To check just trade one of the properly working ESC by the supposedly faulty one, do the same with the motors.
Does the faulty ESC behave that way with the other motors? Does the motor?
If you have the equipment, please check the voltages on the brain's PWM and the ESC's outputs, do they differ from the ones working correctly? To properly check this just push the throttle up without modifying pitch, roll or yaw, as it would cause different outputs on the different connections