Are you using the ESky HH? If so,
Anytime you give stick imput the light will go out.
If it starts blinking steady then it has gone to rate mode. Don't know why they do that but sometimes mine just does. If it starts blinking when it just sittin there and no imputs are being given then you need to unplug the batt. and then plug it back in,that should lock it back up. I also think you can turn up the gain and it might help stop it from lettin go.