Once I switch off of the HDMI connection that is connected to my laptop, and I go back to that input, the screen is all grey:
Roku TV: 7128X
TCL model: 43S425
Software Version: 9.3.0 build 4182-30
Last updated: Jun 25 8:50 am
I've been using this setup for many months now and I've never had this problem. Obviously there are so many pieces and parts but apparently my tv just recently updated and this happened. There could have been other driver updates on my computer too. Or OS updates too.