I was intrigued by the Factory Reset solution proposed by another poster since it seemed to solve his connect problem. I previously tried my own workaround by plugging in an old Roku stick into the HDMI port of my Phillips Roku TV, then setting the TV to go to the HDMI port when it powers on. That workaround gave me a working TV since that particular Roku stick never had a connection problem in the past. However, it seemed ridiculous to plug a Roku stick into a Roku TV.
So yesterday (Sat, July 6), out of curiosity, I did a factory reset of the Phillips Roku TV, connected it to wifi and logged into my Roku account. Setup was easy peasy, just like the first time I did this when I first installed the TV.
My TP-Link Deco X68 mesh system has three networks: (1) the main mesh network (currently includes both 2.4G and 5G); (2) guest network (currently set to 2.4G); and (3) IOT network (also currently set to 2.4G). Based on a prior suggestion from a Roku tech support person several months ago, I connected the TV to the IOT network to make sure the TV only saw 2.4G. At the moment, nothing else is connected to that IOT network.
It's only been one day so no valid conclusions can be reached. However, I turned the TV on three times today with several hours in between. It connected each time. That's promising, but there's no telling what will happen tomorrow or the next day. I'll give it a week or two and report back.
Clearly, there is some sort of bug that causes Roku TV's to disconnect and fail to reconnect to wifi. Hopefully, the Roku people can find the bug and fix it - permanently.
