2 Blink Resolution

• power cycle gateway
• factory reset
• try different cat5 LAN cable
• reboot modem, router, PC, switch etc.
• check PC has internet service
• check router has IPs available to assign
• check router enabled DHCP service (to assign IPs)
• check do not have 2 devices issuing DHCP
• optional:  set static ip (requires Windows PC)

see Glossary:  IP (Internet Protocol) address; DHCP (Dynamic Host Configuration Protocol)