Unfortunately, I can't assist with network questions. Each one is different, and I'm not sure why it's allowing access to one port and not the other. I might suggest connecting the device and then cycling the modem/router. That's about as far as I can go.
There is a forum post for connecting TVs in the Networking forum here:
I just bought this Samsing 46" LED TV model: UA46C5000 and tried to connect to my Router using Wired LAN, however, the router is not detecting any connection from the TV. When I tried configuring it to the TV, it encountered error on DHCP. Then I use manual IP configuration, then it encountered error on pinging the gateway. As I check the status of the router, no connection found from the TV. I tried removing the LAN cable from the TV and connect to my laptop, the router able to detect the connection from my laptop. Do I need to do something? or Do you think the TV have the problem? please help so I can decide to return the TV.