I have to press a button on my remote several times before the TV responds. I have also tried a remote that worked well with my last TCL TV and the same issue exists. Can the IR receiver be replaced or are there external IR receivers available?
I don't think the problem is the remote but rather the IR receiver on the TV; a different remote that worked with a different TCL TV also works the same (intermittently)as the new remote. What brand is the RC-AL7R?
Its a true Roku remote sold separately, it will work with ALL Roku tv's and stand alone Roku's as well. Its Wifi so it doesn't use the IR sensor on the tv which may be faulty in your case. They don't sell outboard IR sensors that respond to roku remotes.