Is the router also a WiFi access point? I'm wondering if the wifi changed, and your TVs can no longer reach it. When you're booting the TV's with the router off, have you tried plugging the router in after the TV reboots and setting up the network settings on the TV again? Try that. If you did try that: Have you tried unplugging the TV for a minute and plugging it back in? Other than that, you may have to factory reset the TV's.
Yeah, I got some Rokus. https://youtu.be/d1CSEeqWl10
I'd tell Comcast they need to replace their router. I have a Roku Premiere set up at my sister-in-law's house. She has Comcast and has no issues. How that router is causing that, I have no idea. But it shouldn't be doing it.
Dan Roku Stick (3600), Ultra (4640), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Nvidia Shield, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.
@crazybits Thanks for the note here. A few other questions here:
- When did this first start occurring? - What is the specific make/model of the new router that Comcast installed in your house? - Can you describe the behavior in any additional detail? Does the TV boot up normally, then after a period of time it reboots, or what exactly do you see during this cycle?
Please feel free to PM me with your Roku account email address and the serial number of your TV from Settings>System>About? I'll help take a closer look to see what else we can suggest.