I recently upgraded to a bigger Roku TV, and it did not have the RCA ports (red, white, yellow), but instead it had a single yellow port for A/V. I needed to buy an "RCA to composite cable" on Amazon (https://www.amazon.com/dp/B00L9I984G/ref=cm_sw_r_cp_apa_fab_bL4BFbWD4FF40), with the red, white, and yellow cables turning into a single yellow cable for this to work.
