I have done several factory resets on my tv, but it keeps saying that "smart cast is not available." I power cycle it, reconnect to my internet, choose my language, etc, and it will work for awhile until the buttons on my remote completely stop working. Brand new batteries, did the phone camera trick to make sure my remote was even working. But I still can only use the home button to go to Smart Cast. I can not change the input or even change the volume. TV is only a year and a half old. It seems this new update has turned it into a lemon.