Currently Being ModeratedNov 16, 2012 12:32 AM (in response to AppleNewbie333)
You've tried all of the 'tricks,' it seems. If I were you, I'd just take the computer and adapter to your local Apple Store and see if you can reproduce the problem on their network. If you can, it may be a faulty adapter. It's really difficult to diagnose hard-wired problems over the Internet - wifi can involve something as simple as resetting the router and modem (have you tried that? Resetting the modem can be tricky if, like mine, it has battery backup: you can't just unplug it and wait a few minutes, you have to find the actual reset button, usually on back).
So see if resetting the router and modem make a difference: if not, it's time for a trip to the Apple Store.
Currently Being ModeratedNov 16, 2012 1:28 AM (in response to AppleNewbie333)
Apple likes to experiment with new concepts which has the unfortunate side effect of sometimes not working as reliable as tried and true methods.
I would try another adapter cable first, and if it works, be very gingerly with it as Ethernet cable/ports as is really not designed to be used all the time with portable devices due to the high frequency of connects and disconnects wearing out the ports.
If you have a Ethernet cable you can set your own router right up in your room, however it's security must be top notch and password only used by you or your roomates as it will soon be overloaded if everyone learns about it.