good advise! .. only thing diff i would do is just buy the servos.. dont worry bout the rx buy a new one
ORIGINAL: Gizmo-RCU
Is you initial failure due possibly to a low/dead battery? Most likely the only serious damage could be in the RX or possibly the servos. Range check the setup and check each servo. If you arn't satisfied with the the RX, send it in to be checked including the crystal.
If you check everything out and are satisfied, spend like you are going to replace the RX.......