Hi, been a member for a few weeks but this is my first post hope it's in the right section.My Syma X8G was flying ok then clipped a propeller as it came in to land & ended upside down,now prop 4 will not power up ,changed motor no better ,other three motors power up then shut off .If I unplug motor 4 the other three motor work as normal.Is it time for a new main board?