I have an iMac 1.83 C2D and a few weeks ago it showed that the network cable was disconnected. Since I connect wirelessly as well as wired I didn't notice it right when it happened, but soon thereafter. I replaced the cable first and then it worked again. Just recently I got a NAS device and started copying about 500GB of data to the NAS. It said it would take about 16 hours or so so I let it go and checked it when I got home from work. It then said something like 5 days left to finish. I checked the network connections and the wired (gigabit) connection showed disconnected again and it was copying at the much slower wireless rate. I've replaced the cable again and even tried connecting the computer directly to the cable modem instead of the router, but nothing seems to help. This iMac has an extended warrantee so I can get it fixed, but I had a few concerns...
What kind of turnaround time will I be looking at taking it to the Apple Store? Do they do the motherboard swap at the store or will they just send me a refurb and send mine back to some central repair facility?
I've read posts from a few others at other sites around the net and many people say that due to the space constraints in the iMac that the network controller overheats and fails at a far higher rate than more traditional "desktop" computers. Can I successfully use the network port for a NAS with the iMac or is the port not rated for continuous usage? I won't be copying TBs of data to the NAS daily as even with gigabit it is slower than the internal HD by an order of magnitude, but I will be storing a lot of data on the NAS (3TB of RAID5 storage)
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