This is the most common error that every user can face. The TV has a number of video inputs and plugging in the Roku device cable to a wrong port can lead to a no display error. Mostly, all TVs have inputs such as HDMI 1, HDMI 2, AUX, VIDEO IN 1 etc. Based on your TV configuration, you should select this input. Select it rightly and press the INPUT/SOURCE/AUD/ TV/VIDEO button on your TV remote and select the appropriate input from the choice of inputs shown on the TV.
go.roku.com/selectinput | www.roku.com/link