I have a Hisense-Roku TV, Model 50R6E1, which I purchased Oct. 2021, and now the HDMI1 and HDMI2 ports have stopped working and are not showing up when I press the HOME button on the remote, only HDMI3. I have looked at quite a few "how to's" and nothing that is recommended has worked. When I go to "Settings" then to TV inputs, the only port that shows is the HDMI3 port and it doesn't show any "unused ports". About the only thing that I haven't tried is the "Factory reset", I would like to wait and use that feature as a last resort because of not knowing the ramifications. I would like to exhaust all remedies before using the Warranty. Any suggestions are appreciated.