"I unplugged it and plugged it in and no longer turns on."に関する回答reset the router and re-configure
"Internet is not working through wifi"に関する回答1. Reset the router (reset will set your router to factory default setting, so you will have to configure your wife again) 3. Connect WAN cable (Internet line/connection from the ISP) to the yellow port 4. Connect your laptop to the WiFi and see if internet is working.