I have a sena S2 remote control that is not working. I have changed the remote control and still not working. Also updated to last firmware. It may seem like it runs out of battery even if I charged the unit. I tried to reset it, it blinks red but still It's not able to pair. In the beginning it connected and then disconnected at once. Now its no signal at all, only when I push the + - button it blinks red, then dies. So I have no idea what to do further now. Does the whole helmet have to be opened to check connections?