Network - Wireless & Wired Connections

[mp202694]

We have had a Roku Premiere+ for several months now and have had no issue. Last week it gave us a message saying there was no internet connection. We tried to reconnect but it will not fins our wifi network when it scans for networks. We have tried resetting the Roku and the router. I decided to buy a new Roku Premiere+ thinking that this one had just malfunctioned but as we are trying to set it up now, we are having the same issue. We have an older Roku that is still connected to our wifi with no issues. Our phones and laptop all find and connect to the network with no issues as well. What can we do to fix this issue?

[atc98092]

Roku players only work on specific 5 GHz channels. Channel 149 is the most common to use. Why it's not seeing your 2.4 GHz connection (I'm making an assumption you have both) is puzzling, however. But it sounds like your router might have changed channels, which they can do if you leave it set to Auto. I can't say why the older Roku connects, either. 
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I realize everything else is connecting to your wireless fine, but I still suggest powering off the Roku, then rebooting your wireless, then trying the Premiere+ again after everything comes back up.