I am sorry to hear that you are having trouble connecting your Fire TV through Ethernet. I would recommend restarting the device. Restarting your device can resolve many issues—just disconnect the power cord (from the back of the device or from the power outlet), and then plug it back in.
You can also use your remote to restart your device. Press and hold the Select Select Button and Play/Pause Play/Pause Button buttons at the same time, for about five seconds. Or, select Settings > Device > Restart from the Fire TV menu.
Hope this helps!
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Hello Forum people, My name is Zach and I am a Moderator for Amazon. I enjoy Film Making, Graphic Design and Web Design in my free time (Different than Kindle Freetime of course). I am also an avid adventurer, looking forward to my next outing!