Ihatepeople11-
If yours is a Roku Express LE, it has a single band WiFi receiver that can only see the 2.4 GHz WiFi band.
ROKU CANNOT FIND LOCAL WIFI NETWORK AT ALL - possible router settings issues:
A) Some recent router updates from cable companies have turned off dual band routers' use of the 2.4 GHz WiFi band. If you have a 2.4 GHz only Roku model and a dual band router with both 2.4 and 5 GHz bands, be sure the router's 2.4 GHz band is turned on.
B) In the 2.4 GHz WiFi band, all Rokus support channels 1-11, as are used in North America. If your router supports 2.4 GHz channels 12-14, which are used in some other regions, make sure your router is set to use a channel in the 1-11 range and that you aren't using an auto setting that could select channels outside this range.