New, out of box soundbar pro purchased yesterday. Set it up and connected to my wifi. It worked last night. Today I woke to find it cannot see my wifi. The router is directly under the tv table so strength is good. I reset the router twice. Unplugged soundbar twice. Reset wifi twice. Resorted to factory reset. Still doesn’t see the adjacent wifi. doesbt see any wifi, including neighbors.
Since the Soundbar is brand new, I would simply return it if not seeing any networks at all (not even neighbors).
Normally, if just not seeing your network, but seeing others, you can check a Roku's device connection ability by attempting to connect it to a mobile hotspot if available. If it can connect to a hotspot, then generally verifies that something is wrong with the network setup.
If the Roku device fails to see the hotspot as well as any surrounding networks, then indicative of an internal failure and needs replacement.
Roku Community Streaming Expert Just another Roku user... I am not a Roku employee. Insignia RokuTV, Ultra 4660, Premiere+ 3921, Express 4k+ 3941, Streambar 9102