I don't have any servo testing equipment, but the issue of the servo not working on power up has been the only repeatable issue I have had, once the receiver is turned off and back on it solves the problem. I posted about this some pages back on this thread. I will say though that to this day once the servo works, it works flawlessly with no issues what so ever, it's just the occasional no work on power up thats the bugger. But like I said, turn off the receiver then back on and it works.