Hey, just for any new visitors to this post.
If you have issues with the lights on your Hub (regardless of which model), please visit https://www.bt.com/help/broadband/fix-a-problem/broadband-and-wi-fi/what-do-the-lights-on-my-bt-hub-....
This will give you information on what the lights mean, with hints, tips or advice on fixing the issue.
Cheers