Last couple month its happened a many times. Try everything from this and other forums. Last weekend upgrade firmware to 1.11.30 and then downgrade to 1.7.60. With no success. Luckily I find a auction on ebay a month ago and win a center board. Replace it yesterday and today tested with all my 3 batteries. Finally its seems solved! Everything was perfect, tested on different distance and modes, with Litchi and Go. May be its will help somebody.
Sorry for my bad english
Sorry for my bad english
