I am 70, so please be understanding.
One week ago, when I first connected my new WDTV Live hub in my living room using a 50 foot network cable to hook it up to my router, it connected to the network instantly, giving me access to the weather network. I then tried to access my home network without success. It did not have access to files on my computer but the opposite was Ok. I could see the WDTV on my computer.
In order to determine whether something was wrong with my home network settings, I connected my work laptop to my router. In the process, I unplugged the end of the 50 foot cable from my router because I used the patch cord to connect my laptop to the router. After confirming that my home network was Ok, I re-plugged the 50 foot network cable patch cord back into the router. This is when my real problems started.
I found when going back to my living room that I had lost internet connectivity. That was 1 week ago and have not been able to get back online. Attempts at Automatic mode of network connecting fails overtime. I tried manually entering all settings manually and that does not work either. I checked the 50 foot network cable using a tester and the cable passes all tests.
The one comforting thing that I have is that if I take the WDTV box to the basement where the router is located and connect it using a short cable, everything works instantly. This evening, when confirming that the WDTV works when connected to my router using a short cable, I wrote down the network numbers. I then moved the WDTV body back the living room and after confirming by an unsuccessful automatic network login that nothing had changed, I manually entered the network settings that had worked minutes before close to the router. No luck, no internet connection.
WDTV service tells me that the 50 foot cable is too long and that I need an amplifier. But this exact cable worked perfectly initially until I unplugged it and plugged it back.
Could I have damage something in the WDTV hardware by unplugging the network cable form my router with the WDTV ON?
One last comment; the green LED turns on when I plug the cable at the back of the WDTV. The yellow LED then flashes randomly. But no network connection!