I can see subtitles and view the picture if Im fast forwarding or rewinding, but I cannot see the video when it is playing normally. I hear sound and see subtitles but no picture.
This happened to me also! So strange the video picture is fine, but goes black when play button used. Do you think it's a system glitch? I have a TCL Roku tv 7104X, -TCL model 49S403. NO luck in resetting picture, going to try the factory reset button next. I was hoping to find a way to troubleshoot instead of resetting to factory settings..I hope that will work!.
Update...Resetting to original factory settings heals the problem. All is well...
I've had a similar problem twice in September 2020 with my TCL Roku TV. The first time, I had a black screen and no audio from my cable STB (HDMI) & simultaneously no video or audio (but menus were fine) in my cable provider's app. A few TV reboots seemed to correct it. The 2nd time, a couple of weeks later, audio & video were missing from the STB and all apps. A couple of reboots restored audio, and a few more restored video as well. Huh??
@https://www.reddit.com/r/techsupport/comments/hilgvs/tcl_roku_tv_playing_audio_but_no_video/