This article includes steps to troubleshoot a Plug-in cable error for AmpliFi routers. This may be encountered during an initial setup or after a recent change, this issue may arise after moving or changing wiring. Make sure to have a few spare ethernet cables on hand for testing before you begin.
1. Verify that the WAN port ethernet cable is securely plugged in. Push the fitting of the RJ45 cable firmly into the blue WAN port until there is an audible click. Note that the WAN port should be connected to the internet service provider (ISP)'s modem.
2. A faulty cable may be the cause. To test this, connect a new cable that works. To verify, connect the cable to a laptop and test the connection by connecting the cable directly to the ISP modem and try to access a webpage or other online content.
3. Make sure the AmpliFi system has the latest firmware. To check your current firmware version simply launch the AmpliFi app, select the AmpliFi router icon, navigate down to the Information section and select About. See how to update your firmware in the Settings > Firmware Update section of the AmpliFi User Guide.
4. Make sure that the router is connected directly to the ISP modem. If there is a switch between the modem and the AmpliFi router, bypass it and connect directly to the modem.
5. Connect your laptop to the particular port that is in question. To verify connectivity to that specific port, open http://amplifi.lan on your browser and log in to the router, if you can do this then that specific LAN port is in fact working, you must test each LAN port individually. If this fails you will be unable to load the web page and may have a faulty port. You will be unable to use this to verify if the WAN port is working.
6. While leaving the router's WAN port plugged into the ISP modem, power off the modem. Reboot the AmpliFi router by unplugging it from its power source. Once AmpliFi has completely rebooted, this process may take up to three minutes, boot up the connected modem.
7. Your device may need to be reset back to factory defaults. To do so:
- Launch the AmpliFi app and select the AmpliFi router icon.
- Under the Settings section, select the General tab.
- Select the factory reset option under the Actions subsection.
- Complete the setup of the router and attempt to connect to the port once again.