Just hooked up a TiVo BOLT VOX 1TB to a 43" UHD 4K tv #43S423 thru HDMI but I don't get a signal. I tried my Roamio OTA and bingo works great. Since everything is networked I guess it don't matter to me. It is a nice inexpensive TV so I cant complain much. Tried the one code for my remote from TIVO and that did not work. Found another code in the forum code history that did #1264 or 0999. Im curious if others had this issue with TCL TVs.