We have a TCL Roku TV, but lost the remote. I just today, bought the new Roku Voice Remote and tried pairing. It's been unsuccessful. The remote has the green blinking pairing light, that starts blinking as soon as the batteries are inserted, but the pairing dialog box never comes up on the TV. We hit the reset button on the TCL Roku TV, and we're now stuck on the language screen and still can't get the remote to pair to the TV.
Unplug the power from the tv, then plug it back in when the roku is bouncing start pressing and holding the pairing key in the battery compartment, when it stops bouncing release for a bit and start pressing again until you get conformation its paired.
After doing that factory reset you're going to have start from scratch and sign in to all your apps again.