My son was screwing around and disconnected all the ethernet cables from my switch. I have the feed coming from the wall to the switch and two cables going to a mini and an imac. Both have this "Ethernet has a self-assigned IP address and will not be able to connect to the Internet." Wifi is fine, and I can access my network drives. I have tried most of what I have found to troubleshoot the problem with no avail. The wifi on the imac no longer works so I need the ethernet. Any help would be appreciated. I am a noob when it comes to network jargon. I use Bell Aliant Home Hub 3000 as the modem.