Try a DHCP release & renew: http://kb.wisc.edu/page.php?id=562
If that doesn't work, try giving the machine a static IP address.
IP address: 192.168.1.211
Subnet mask: 255.255.255.0
Gateway: 192.168.1.254
DNS: 192.168.1.254
Yes tried to swich to different ports - nothing... Does changing faulty homehub is for free or I need to pay for that?