One of our iMacs on our home network is consistently having problems with internet connection. It will just randomly drop-out. I have had it connected by ethernet but it will not connect to the internet at all that way (it can use the LAN no problems), sometimes it will show 'green' in the network control panel but still not connect to the internet. Most of the time it just shows orange. Every other device connected to the same switcher (AppleTV, Playstation, Cable TV, TV) have no internet problems. So it's connected wirelessly and is still having problems. Signal is strong so that's not the issue. All other devices that use same wifi network (iPad, 3 x iPhones) have no network stability or connection issues. Understanding & fiddling with IP addresses etc is totally out of my realm of expertise so any help would be greatly appreciated.