@Lindamcl60, it's not clear what you're trying to do. Are you trying to get your Samsung Smart TV connected to the Internet? That wouldn't have anything to do with Roku or a Roku device. Do you have a Roku device connected to the TV? If so, you need to change the input on the TV to whatever input you connected the Roku device to (HDMI1, HDMI2, etc.). More details about what's going on would be helpful.
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