No Roku here, but back in the day, our cable would suddenly stop working because the connection got dusty or dirty or something. I would unplug it, clean it with a Q-tip moistened with alcohol, let it dry, replug connection, and all would be fine.
I know it’s a long shot, but if it doesn’t help, you can moisten yourself with alcohol. 
You could try checking signal strength while holding your phone in a similar location, with an app like WIFIMan, but given that the other TVs are working, that’s unlikely to be the problem. I’d suggest rebooting the Roku under the system menu. If that doesn’t making the connections visible again, then you could try swapping the Roku with another streaming stick, such as one from your other TVs. If the issue follows the Roku when swapped with a different TV, then replace the Roku stick. They are inexpensive, and if it’s an older model, you’ll get a lot of new features and improved performance with the newer one.
Oh no @VeryHappy ! Look at it this way…one way or another this will be fixed, but thank goodness it happened BEFORE you cut the cord. My bet it’s the Roku stick. We had to buy a new one a few years ago when ours stopped working. All we needed was a new updated one and everything was fine.
Ours is getting cut next Tuesday, after the championship game. DH is all on board at this point.
@conmama : Congratulations to you!! As I said in my original post, I was literally going to cut the cord yesterday AM! The new Roku stick arrives today, and hopefully everything will be good after that. Assuming it is, the call to the cable company will happen on Wednesday.
I’m wondering if something in your system timed out. We have a ridiculous system, 4 remotes. My husband is the one who turns things on (my vice is social media). When he went away, I avoided TV the first 4 days…. which meant the Bose remote (usually not needed) had to be used to turn on the sound system.
Thanks, @Colorado_mom . I don’t think so, since I can’t turn it on at all, anyway, no how, no go, ain’t gonna happen, I tried I really tried, just waiting for the new Roku stick now.
New Roku stick arrived.
Before I disconnected the old one, I tried it one.more.time.
It didn’t work.
Installed new Roku stick.
Everything works!!!
Tomorrow morning, I call the cable company and go to turn in all their equipment.
Next on the agenda: I think we need a more powerful router, now that we’ve got our TV service going over the internet. Any advice, oh Wise Ones??
Yah!!! I had a feeling that would solve the problem! I can’t wait to do it next week. I think the thing that turned DH was when we got our recent bill for $320. He actually said “cut it”. I was the one who said no, let’s wait until the NCAA is over (that was self preservation on my part).
Let us know tomorrow when it’s done.
I will, @conmama. Thanks for your support!
If you have a large house, a mesh network might be the best option. We have Google Nest with 3 nodes and it provides very good coverage throughout.
Thanks, @DadOfJerseyGirl .
What’s a mesh network? As opposed to – what??
What are nodes? Are those the “antennae” that stick out from the router??
Is Google Nest a piece of hardware? Or is it some – ummmm – operating system??
Talk to me like I’m in kindergarten, please. 
Sorry about the jargon 
This is the product I’m talking about:
The Nest WiFi network is a group of devices that work together to provide you WiFi coverage all over your house. You need a minimum of one device (“node”) and that works like your regular router. But you can buy additional devices and place them around your house. They will all work together seamlessly to provide wide WiFi coverage.
An additional bonus is that each device also acts as a speaker (so, for example, you can play music from your phone) and provides access to Google’s AI assistant (similar to Siri or Alexa).
Hope that helps.
You mentioned having an extender earlier. A mesh network uses a similar principle. You have a router and one or more extender-like nodes that together form a “mesh”. A key difference between router+extender and mesh is with the mesh network, your phone or Roku only lists a single network to select, instead of both the router and extender. The device using the mesh network is supposed to automatically choose the router or node that has the best signal, and automatically switch to a different node as you walk to a different section of house with your phone. Your phone always stays at a high speed, with strong signal, regardless of where you walk in the house.
I say “supposed to” because some older hardware may get confused by mesh networks. For example, if your other TVs have older Rokus, you may find that they are selecting a more distant router/node instead of the closest one; resulting in a relatively low reported speed. Router + extender won’t have this problem, as you select either the router or extender in the Roku network connection menu – it isn’t able to choose the wrong one. Note that Rokus don’t need a particularly high speed, unless you are using 4K type content. Your shows are still likely to work when the wrong node is selected.
Note that only the Nest non-pro “point” nodes support Google assistant smart speaker. The Nest non-pro router nodes do not. The current generation (tri-band) Nest Pro does not support smart speakers in either router or point.
Thanks.
At this point, smart speakers are beyond my abilities. I just want stuff to work right, and fast.
I did buy two wifi extenders when I started all of this. The modem and router are in my office, so I got a wifi extender for the family room and another one for upstairs. I really don’t want to upset that conglomeration, so I’d like to simply replace the existing router – which is owned by my cable company, who I hate, and which I pay rent for every damn month.
You may want to give it a little time before you change anything, internet-wise. We weren’t really having internet/wifi problems, but a few months ago I realized my ISP (Verizon) was offering plans with a much higher speed than we had, at the same price we were paying. So we “upgraded” to a 6x higher speed (300 vs. 50), plus a new “state of the art” modem/router.
Immediately we started having trouble with streaming over wifi - buffering, dropping connections, content not loading… After a lot of rounds of phone calls with tech support, things are pretty much back to normal for streaming (although it’s still wonky when the microwave is running). It’s beyond me how my old router was doing just fine all those years, but the new one was struggling! If I’d known, I wouldn’t have messed with changing things.
Good point, @02BonCC. I don’t want to upset too many things too fast! But I know I need a new router.
For months, my PC – which sits all of two feet away from the router and one foot away from the modem – drops its connection if I walk away for ten minutes or so. It doesn’t happen with anyone else’s computer, or with other technology. I assumed there was something wrong with the PC – and there may be – but the computer works when I travel with it to my sons’ houses, so I don’t get it.
When I get serious about it, I’ll start a new thread!
Does it have an Ethernet port so you can physically connect it via a cable to the router?
Who is your provider?
@DadOfJerseyGirl : It never occurred to me to do that. But yeah, I probably can. I’ll investigate tomorrow.
@conmama: It’s Optimum, which is owned by Altice. There’s only one other internet provider in the area – Frontier – and the reviews aren’t yet good enough for me to switch.
