i recently purchased a A10 thunderbolt II from nitroplanes and it seems the recever doesnt work i charged the battery for 3 hours and pluged it in. the servos twitched then when i went to test them with the controller i have to responce i tried flipping the crystals i tested the battery with a multi meter it reads fine i also double checked all the connections and cant find anything that look off. so im not sure what to do to fix this besides buyin a new recever.