1 of my fire tvs will not work with tv app. No matter how many times and ways I try to connect to this tv it never is able to locate the device. My other 3 tvs have no issues....however, they do not use the appoften, so can't say it works all the time. But the 1 tv it fails on is the one tv we always lose the remote for making the tv completely useless until found again. I can't find any explanation as to why the app doesn't work for that one tv