Follow these steps to troubleshoot this issue and check if the issue is resolved after each step:
- Check the ambient temperature and the temperature inside the remote controller. The remote controller may not charge if these temperatures are too high or too low.
- Disconnect the AC adapter from the remote controller and the wall outlet, and then reconnect it.
- Make sure that the AC adapter and the power cord are correctly connected.
- If a USB cable is connected to the micro USB port (USB-B) of the remote controller, disconnect it.
- Press and hold the power button for at least 10 seconds to force the remote controller to turn off.
- If the issue still occurs, simultaneously press and hold the C2 (Custom 2) button and the power button for at least 10 seconds.