I have the same charger and I have seen that before. It may be nothing more than the ribbon cable to the display. Remove the bottom of the charger and be sure the ribbon cable is seated completely into it's socket. Replace the bottom and try again.
I was watching a review of this by Captain Drone and it reminded me of a Q500 and the more he went into it the whole design philosophy seems to be more Yuneec. Did they licensed some stuff from Yuneec? Or bought them out or a new division/name change?