I have a cable box for one tv and I am looking to split that via hdmi to a new Roku tcl tv. I have the splitter set up (cable box to splitter ‘in’ and one for each tv on ‘out’, on the right hdmi source and I’m getting an error on the Roku tv that says “HDMI 1 (Arc) No signal - is it connected”. I can’t figure out what I can be doing wrong and all of the cables are connected securely.
You would need an active HDMI distribution amp not a passive splitter.
The cables you use affect the HDMI connection so try different cables.
You don't need to use the HDMI-ARC input. It serves no purpose in this case so try a different input too.