I see there are several threads with similar problems but some of my details are different so I am starting a new thread.
I have two Roku TVs that started losing their WiFi connection about 6-8 weeks ago after powering the TV off. Powering the TV on again results in a message in the upper right corner to the effect of "network not connected." When I go to "Setup Network Connection" the scan for networks function never displays any APs when it should display dozens (this is my father's apartment in a densely populated apartment complex).
I then chose the "Reset network connection" option and the TV rebooted. Now when I scan for networks I see dozens including my father's and I am able to connect and use the TV normally. When I turn the TV off and then on later, the ordeal begins again: No network connection and a reset is the only thing that will allow me to reconnect to his network.
Note that every other device on his network is functional during this time. There's no indication of any problem except with his two Roku TVs (Device type: 43" TCL Roku TV). His ISP is Optimum and the cable modem brand is Arris.
Here are some interesting observations that may help:
- When his TV entered a locked-out WiFi state I took the TV to my home where the APs are made by Ubiquiti. Without resetting the network connection, I tried to use the "Connect to Network" function and the TV did exactly what it did at his location: It showed no available APs and just kept scanning for a long time. If I then reset the network connection, my APs all display immediately and I connect without any problem. The TV continues to work reliably across power-on/off cycles.
- This appears to be a strange interaction between the Arris WiFi cable modem and the Roku TV. Arris may be at fault for triggering the problem, but why is the Roku device letting itself get permanently trapped in a state where its WiFi function won't connect to ANYTHING including a new AP?
- His other RokuTV is branded as Westinghouse and is a year older. Both of them behave exactly the same way.
- His Arris WiFi cable modem is located no more than 20 feet from each TV. Signal strength is high and as I said every other device works flawlessly including excellent bandwidth on speed tests. The modem has been power-cycles several times during debugging and that never changes anything written above.
These TVs don't have wired Ethernet so I can't use that as workaround. He's 81 years old and not capable of keying in his WiFi password every time he wants to watch TV. He also can't remember to never turn the TV off. He's driving me nuts with no understanding of how long it takes to fix technology problems! 😀 Please help!
Since I have to go to my father's apartment to work on this issue, please let me know what additional information you'd like and I'll reply with it in a few days.
