Glad that worked for you.
In the future, any networking issues, including buffering, freezing, etc.. or extreme cases like this one (no wifi detected) First thing to do is unplug modem/router for 30 seconds, and then plug them back in, just to start clean. Especially true if the router is also issued by the ISP. They are typically crap and tend to get overwhelmed too often, by streaming devices.
At least the mystery has been solved.