Ive had my TV for about a year and had no WIFI issues until I consistently was told that I did not have a connection. Took me a a couple hours but finally realized that my MAC address was all zeros. I then searched this forum and found that this seems to be an ongoing issue since early to mid 2010s. Anyway, I tried almost everything that was recommended, such as sequences for soft reboots using the power button on the set, unplugging the unit etc. I then entered the self diagnostics through Device Care and reset the network (requiring me to connect a keyboard as I have a smart remote and still dont know how to enter numbers for the PIN when you cant use your phone as there is NO internet). This did not work, but what I realized is that the unit still had the name of home internet. So it clearly did NOT reset. So then I went to the general menu, chose network and reset through here as well. This seemed to be the key sequence for me. Power sequences and unplugging didnt work, though I didnt unplug for hours rather only 30m. Hope this helps someone out there.
