My Hub 3 has stopped working. It's displaying a continuous red light indicating overheating. It's in a cool position in it's situation. I've tried several 30 second resets and got it back to it's original settings as a router but the red light remains on. Neither it or the power supply are warm but to be sure I've unplugged both items and left them in a cold garage for over an hour, but the problem still exists. Has anyone got any ideas for a solution? Thanks in advance.