Roku Update seems to have broken use of Remote Control
- 2 years ago
Not that it necessarily matters in this case, but when discussing Roku devices model numbers are always better than names since Roku uses the same names over and over on models with different capabilities (and there's no model called simply "4k").
When pairing remotes I've had issues where it will pair with another device nearby instead of the desired device, so try unplugging the power from any other Roku devices you have while attempting to pair the remote. My preferred method is to connect the power once I've put the remote into pairing mode and set it down next to the device I'm trying to pair it with.
Assuming the device is still connected to your network, you could also try using the mobile app as a remote to kick off the pairing process from the Settings menu.