That coax jack needs to be replaced, first and foremost. It's an easy task... just do it. It's low voltage so you're not going to risk any damage here... Most likely you can remove the two plate screws and simply unscrew the in-wall coax cable from the plate, and replace it with a new one for a grand total under $10. Next step is resolving the systemic disconnect issues. I'm betting someone installed a second router without configuring the two devices to work together. This means that they are conflicting with each other, which brings down parts/all of your network. Short version is the C7000v2 needs to be set to Bridge Mode. I'll leave the longer version to an AI: You can absolutely use your Nighthawk BE5000 mesh system alongside your Netgear C7000v2. However, because the C7000v2 is a combination modem/router, it must be placed in bridge mode (modem-only). This prevents network conflicts and allows the BE5000 to act as your primary router. [1, 2, 3, 4] Step-by-Step Setup Instructions 1. Disconnect & Power Down Unplug the C7000v2 from the coaxial cable and the power outlet. Unplug any existing routers or devices connected to it. [5] 2. Turn on Bridge Mode Connect a single computer directly to the C7000v2 using an Ethernet cable. Open a web browser and type or into the address bar. Log in using your admin credentials (default is usually and ). Go to Advanced > Advanced Setup > Router/AP Mode. Select the ** Modem (Router Mode off / Bridge Mode)** option, apply the changes, and wait for the C7000v2 to reboot. [5] 3. Connect Your BE5000 Connect an Ethernet cable from the yellow Internet port on the back of your primary BE5000 router to one of the LAN ports on the back of the C7000v2. Power on the C7000v2 first and wait a few minutes for the online/internet light to turn solid green. Plug in the BE5000 and wait for its LED to stabilize. [5, 6] 4. Finish Setup in the App Open the Nighthawk App on your smartphone. Follow the on-screen prompts to configure your new mesh network's Wi-Fi name (SSID) and password. [6, 7] 5. Manage Wireless Interference You should disable the Wi-Fi broadcast on the C7000v2 to prevent signal interference with your new mesh network. You can do this in the C7000v2’s web admin menu by turning off the wireless radios. [3, 8] Would you like help with:Optimizing the placement of your mesh satellites?Disabling the wireless signal directly on the C7000v2?Reconfiguring specific settings on your Xfinity/ISP account? AI can make mistakes, so double-check responses [1] https://community.netgear.com/discussions/home-cable-modems-routers/using-existing-c7000v2-with-nighthawk-mesh-satellites/2388458 [2] https://www.amazon.com/NETGEAR-Nighthawk-Certified-Xfinity-Spectrum/dp/B00ZUPOF7Y [3] https://community.netgear.com/discussions/en-home-nighthawk-mesh-system/nighthawk-c7000-and-orbi-mesh-wifi-compatabilitiy/1924165 [4] https://community.netgear.com/discussions/home-wifi-routers-nighthawk/using-c7000v2-as-router-for-mesh-network/2019067 [5] https://www.youtube.com/watch?v=j6wWXjgY8tE [6] https://www.youtube.com/watch?v=gIVEtY3tREs [7] https://www.netgear.com/home/wifi/range-extenders/exs27/ [8] https://community.netgear.com/discussions/Orbi/how-to-configureset-up-netgear-nighthawk-ac1900c7000-modem-router-with-orbi/1274331
