TV series 7 NU71000 not able to turn on via Google home

Hello I bought a Samsung TV series 7 NU71000 but I’m not able to turn on via Google home (mini) I already add the smart things integration with Google and when I arrive home in my smartthings app on my phone the TV appears as disconnected until I turn on the TV when I turn off, the TV appears in the app as TV turned off but like 5 minutes later it appears TV disconnected, sorry for my bad english