I have an iMac that will connect to my network wirelessly, but not through the wired ethernet. The cable works fine with another computer. The network utility reports that the link status is inactive, network preferences reports that the ethernet is not connected.
My question: is the hardware faulty or is there a software, PRAM or other non-volatile setting that I can reset to bring the wired network back to life?
I have tried resetting the PRAM with Alt+Cmd+P+R and disconnecting the power for 15 seconds with no success. (But there is no feedback that the second incantation has any effect.)
I have a 2010 model, 27" iMac, 2.8 GHz i7, 8GB RAM.
I have had the same problem with the first release of OS X 10.8 and the last release of 10.7.