Hi guys,new to drones. I have a problem with my controller. When I turn it on it starts to boot,gets as far as the loading line,then KARMA on the screen and totally blank after that. I`ve tried totally discharging the battery,no good. Fully charged and tried a factory reset,no good.Can`t seem to find anything on the net of any help. hoping one of you will have a solution? ......TIA