Hi, I had the same issue. I disconnected the motor , in order to replace it. On reconnection the motor went to full throttle immediately when making battery connection. I could control the elevator and rudder from the tx, but no throttle control. After looking closely at the socket it plugs into on the board , there are three holes. Two obvious ones and a much less obvious third. After disconnecting the two pin motor supply plug and moving it to the other possible connection everything worked ok.