Thank you for your prompt reply.
Yes, you are correct. I have 4 Roku sticks, the new one - not working and one that was plugged into my HDMI port, and up to 1 week ago worked.
I'm Wi-Fi 2.4 Ghz
Is the third TV further away from the router than the other two? Are there more walls between the third TV and the router than the other TV's?
Have you placed anything anywhere between the router and that TV (especially anything metal such as metal shelving? Is the router near anything metal or a TV that could be interfering with the radio signal?
Have you tried plugging the third Roku stick into one of your other TVs to see if it then works?
Are you using any wifi extenders?
