Help me for My Dragonfly #5

I am having Dragonfly #5. Initially its both rotor were running normally. Later only top rotor was running and bottom was off, now bottom is ok and top is stopped. I am very beginner of RC Helis and still waiting for its first flight!! Any guy can recommend me usefull tips for my successive flight and to run both the rotors?

[stuhan]

Have you checked that all the connectors to the motors/ gyro board are all ok, try unplugging then replugging them all, also try carefully tweaking the mixer screw on the gyro board.

I tried all options and finally I dismental Heli and interchanged motor connection, still motor is not working so what I assume is motor is dead.

[stuhan]

I suggest that you connect the motors directly to the battery, (having removed them from the heli) one at a time, if they run you must have a fault on the reciever mixer board.