Hello there, my name is ***** ***** I will be assisting you today. It appears that the Arris SBG6580 is a combination cable modem / router. Can you tell me how many devices are successfully connected to this device and automatically get their IP addresses? I want to start with simple configurations first, then add to it.
On your TV, are you connecting to the network wirelessly, or using an ethernet cable plugged directly in the TV? If you are wired in, I would suggest replacing the current ethernet cable plugged in to the TV with a different cable if you can. Also, can you ping network devices from your TV (if you aren't sure how to do some of this stuff, that's ok. Just let me know and I can help).
Once you answer my questions and I understand you network setup a bit better, we can proceed!
I do see where you stated that your Samsung TV is hardwired to your Arris modem/router. Can you substitute another network cable for the current one just so we can rule it out?
This is Gary from JustAnswer just checking in to see if you are still needing help with your TV.