If you’re experiencing the issue of your Fire TV Stick 4K restarting, there are several fixes to get you up and running again. The first thing to check is the cable that came with the Fire TV Stick. If you’re having issues, try using another micro USB cable. For about 50% of users, this should solve the problem.
If changing the cable doesn’t work, the next step is to try a different USB port on your TV. If that doesn’t work, plug in a phone adapter and connect your USB to a wall outlet. This could solve the problem, as it did for the speaker in the video.
Another possible scenario could be an issue with your HDMI port. Try plugging it into another HDMI port to see if that fixes the problem.
By following these steps, at least 90% of users should be up and running again. Give a thumbs up to let us know which step worked for you and good luck!