Same problem. But slightly different. All of a sudden in the last 2 weeks at times I will turn on the tv and the TiVo input will show NO SIGNAL. I swapped out the HDMI, same issue. I changed the TV port to another HDMI port on tv, same issue. I can use my Tivo-Mini to see the Tivo/watch shows/etc all is ok via Mini. However, if I do anything on the Roamio, I cannot see it - NO SIGNAL. If I reboot the Roamio (power cable pull since I have no menu to do it gracefully), I get the cartoon intro just fine and the Menu & everything else, and all is well for X days. Then randomly, it will go NO SIGNAL again at some point. I run on UPS so there is no power-issue. If Tivo made a change that adversely affects HDMI signal, I would truly hope a fix is coming quickly, because obviously something is wrong if multiple people are seeing this problem out of the blue. I have no HDMI switch, it's direct connect TIVO to TV (Samsung just purchased in 2014).