WNDR3400 not broadcasting wireless networks?

Comcast told me to reset my wireless router while trying to troubleshoot a problem with my modem.  The modem issue is now fixed, but now I have no wi-fi.  I have Internet access through the router's wired connection, but now neither of the wireless networks appear to be broadcasting (corresponding lights are not lit, don't see the SSID's being broadcast when I search for wi-fi from any device).  Is there something I need to do to enable it from the routerlogin.net configuration page, or something?  Thanks very much to anyone who responds, you could save me from having to buy a new router!