Rocu model 3820x with long range wireless receiver model wr002.
Have rebooted router, rocu and unplugged-reconnected everything. 2 other tvs on this same router with rocu work perfectly. Only problem with this TV. Picture onbthis TV is good until I click on a program.
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I finally tried to switch out the 2 rokus i have. The 4k that was on the TV in my living roo, with issues is now in my bedroom and working fine. The other roku from my bedroom, that is now on the TV that I had issues with is STILL having issues. Leading me to believe its something with my Vizio TV. And NOT the roku itself. I have 2 other HDMI ports. So i figured id try the main one. I then switched my input on the TV to "cable box" and walah now its working! Im nit sure if permanent fix or temp. But i suggest others try this as well. See what happens.
For whatever it’s worth, this just happened with my mother in laws television. To get it to work, I went to settings, display type and then set it back to 720p. Once we did that, it immediately started working. It sounds like everybody with a stick who has an issue has the express stick 4K, which leads me to believe it’s something when trying to display higher quality video than the tv allows. I’ll update if she mentions it going black again but worked from that update.