I have New Roku Express. Can I connect it to HDMI port on my cable box , which it still working? The cable is connected to OLD Sanyo tv with S-video cable. The dvd player is connected to tv via the red, yellow, and white cables. I do not know if HDMI on cable box is in or out. It is through Suddenlink. Or on a restricted budget, do I buy a hdmi to rca converter and a splitter?