Invalid network cache The unfavorable power output of the network adapter How to Fix Ethernet Port Not Working There are a ton of methods to fix your ethernet connection and its port in the motherboard. The definitive fix for your issue could differ from other users. My setup: Modem > Asus RT-AX3000 (primary router) > cat6 to a second Asus RT-AX3000 (AP Mode). Both routers have the latest firmware updates. Wifi works on both routers no problem. AP router ethernet ports work, however, the ethernet ports of the primary router do not. Reboot your computer and see if that helps when your Ethernet is not working. If you're not using a computer, and don't know how to restart the device you're working with, cut its power So, make sure that you are using the right port of the router. There are multiple ports on a router and you should connect your Ethernet cable to another one. Once you are done, check if the problem is solved. Temporarily disabling your antivirus is another thing that might be causing the problem. WiFi continues to work perfectly. My setup is as follows: Spectrum internet line --> Modem (Spectrum provided) --> Netgear Nighthawk X10 (R8900) Router --> Netgear GS316 Unmanaged Switch --> All wired devices, additional switches, etc. What I've tried so far: Connected my laptop directly to the router to ensure it's getting an internet connection. Ethernet adapter not working. I already submitted a ticket for support, but I'm just wondering if anyone else had a problem with setting up the adapter or a had a fix to get it working all it says in the app is "Starlink Disconnected", and nothing works while the adapter is connected. They sent a second one thinking the original one was faulty There are also USB versions of Ethernet cards, such as external dongles. An Ethernet card is known as a network card. It has ports where you connect cables. There may be two ports, one for an RJ-45 jack that connects unshielded twisted pair (UTP) cables and one for a coaxial jack on the network card. (Coaxial connections are extremely rare Re:LAN ports not working. The FW upgrade is not likely to be the reason for your issue. Unplug all LAN connected devices, reboot the router and start plugging them one-by-one to check if any of these causing an issue. If that doesn't help - reset the router to factory defaults and re-configure the router from scratch. Then test again. After i changed the user names and passwords for the WIFI i noticed that the ethernet ports stopped working. All of the ports work when i plug my laptop into it but when i plug my Western Digital My cloud into it i get not internet to that device. Same thing happens when i plug in an extra router. If a port LED with an Ethernet cable is not lit, move the cable to a different port on the back of the router. If a port LED still does not light, see the router manual. If you are using a wireless device, check that the LED on the wireless adapter is lit. If the wireless adapter LED is not lit, then do not continue with this article. VeOH.