This issue is driving me crazy. It has been present for months, even after firmware updates. When I turn on the remote controller it starts beeping along with the flashing red LED at the bottom of the controller, showing battery condition. The batteries are all charged. Usually, I will turn it off and try again. Sometimes, after three or four attempts that will fix it, and everything works as it supposed to. Today, it took about 25 times before it came on with no beeping. I did nothing different on the 25th time, but for some reason it decided to work properly. When it turns on as designed the flights are normal, no discrepancies. Have any of you experienced this before? Any suggestions? I have found nothing relevant in a search.