Using the WAN Coax light to troubleshoot the Verizon 9100EM router
- The most common cause of a lost connection to your FiOS service is a bad connection between the router and your FiOS wall connection.
- Check the connection where the coaxial cable attaches to the coaxial connection on the back of the Verizon router.
- Check the connection where the same coaxial cable attaches to your FiOS wall connection.
- If the WAN coax light is now illuminated but you can't connect to the Internet, continue with Troubleshooting Step 3.
- If the WAN coax light remains off, contact the Verizon Fiber Solutions Center.

