Hi Swinno,
You can test the hub ethernet ports by removing all the ethernet cables then re-attach one cable into port 1 and 2 at the same time, then the same cable into ports 1 and 3, 1 and 4 etc and check to make sure both ports light up.
If one of the ports fails to light up when testing using the above method then then that hub port will appear to be faulty.
You should double check the above with a different cable to also rule out any faulty cables.
Dave
The Service you do for others is the rent you pay for your room here on Earth - Muhammad Ali