The extender gains its signals from the router via cable or Wireless or WPS, and router get its signals from the modem via Ethernet cable. So, you must check the router to modem connection as well. Make sure the Ethernet cable is connected to the correct ports (router’s WAN port and modem’s LAN port). Also, examine any cuts on the cable. https://gomacard.online/easy-guide-to-macard-re1200-wifi-extender-setup/