Hi @dbrucke,
Welcome to the Roku Community!
We will be delighted to help you even more. Please ensure that the cords are securely plugged in and that the Roku device is turned on. Additionally, you can use the Samsung TV remote to choose the appropriate input or source for the HDMI input that your Roku device is plugged into.
We sincerely hope that this is helpful. Please let us know what you discover.
Kind regards,
John
John
Roku Community Moderator