My Samsung TV is connected to SmartThings but appears offline when I power off the TV

If you are unable to turn your TV “On” from your SmartThings app, check: 

• The following TV models cannot be turned on from the SmartThings app on your smartphone:

- 2017 model year Smart TVs: Model M5500 and later.

- 2018 model year Smart TVs: Up to model N5500.

• If “Turn on from mobile device” is disabled in the TV settings menu:

- TV Settings > General > Network > Expert Settings > Turn on from mobile device: Enable.

• If SmartThings has not been used in the past 28 days, TV connections are reset. 

- In the SmartThings app on your mobile phone, enter the TV plugin. When you see the following pop-up message:

"The server connection has been disconnected because it has not been used for a certain period of time. If you want to connect again, please tap the OK button and turn your TV off and on” press “OK”.