Hub LED constant blue
If during start up the hub blue LED light remains on and does not go out, disconnect the power. Place a book under the hub and also put the hub on its side (not flat). Now, ensuring the ethernet cable between hub and your broadband router are connected, reconnect the power to the hub and wait for the hub to start up fully (blue LED should go out after it has fully booted).
If that does not resolve the hub startup issue please email firstname.lastname@example.org detailing how the hub is connected to your router (with photos if possible) and also stating what you have tried. The support team can then get back to you with more pertinent troubleshooting advice.