Samsung Smart TV stopped connecting

For the past few days, my internet has been slow. I have reset and restarted both my modem (Gateway XB8) and router. Tonight, I am able to connect to the internet on my phone and computer, but my Samsung Smart TV will not connect. I have restarted my modem, completely reset and set up my wifi, and unplugged the TV. The IP address shows as 0.0.0.0. I have tried to manually put in the IP settings, but nothing I've done has worked.