Advertisements My TV only has one HDMI input. We bought a simple HDMI switch/splitter which recognizes our ROKU and an older DVR, but it does not recognize the TiVo Roamio TCD846500. We also tested on a TiVo TCD840300 Roamio Pro DVR to see if it would be recognized, but with no success. Do we need a more complicated splitter switch? Any advice? Thanks in advance for any responses.