Tv ue43ru7170uxzt does not turn on anymore whit google home

Hello everybody. I have had a UE43RU7170UXZT TV for a year. It has always worked with Google Home. on, off, channel change, input change and volume management.
Since yesterday, both me and a friend of mine (he has the exact same TV as mine), when we ask the assistant to turn on the TV it says that the ignition is NOT supported. I also have a UE43RU7400UXZT, and them all works fine.
Why does this happen? Has it happened to anyone? How can this be solved?