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BT Home Hub 4 and 5 - Red Power Light
How to fix problem:
1. Press the Restart button at the back of your hub and release it when the Power light turns orange. Your hub will restart and the Power light will turn blue
2. If your light stays red, reset your hub back to its factory settings - how it was when you first got it
3. Use a paperclip to press the factory reset button at the back of your hub for 20 seconds
4. Wait five minutes for your hub's power light to turn blue, which means it’s reset
5. To reconnect to your devices find your wi-fi network name and password on the back of your hub, then on your device search for your network name and enter your password