If Netflix keeps logging out on your LG TV, this may be caused by an attempt by Netflix to keep your account secure. If you have given your login information to multiple people in multiple locations, Netflix may think your account has been compromised which will force the logout.
Netflix will not work on the Apple TV if either of these is out of date, your log-in doesn’t work, the app has frozen, the network connection is disrupted, or the Netflix servers are down. These issues are generally fixed by restarting or resetting your Apple TV, modem/router and/or Netflix app.
As a general rule, you’ll want to first restart your Samsung TV by turning it off, and unplugging it at the wall for 2 minutes. Then turn it back on again. If that doesn’t fix it then you’ll want to have a look at your speaker system to see that it’s all connected.
As a whole you’ll want to first try playing another movie or TV show. If another TV show or movie works it means that the TV show or movie you were trying to watch is broken. And you should report the problem to Netflix so they can fix it. Otherwise it’s an issue with the speaker settings.