We have three Roku Premiere units and the remotes for all three stopped working a few months ago, literally on the same day. I've tried repairing by pushing button on the back of the remote...nothing. I've resorted to using the remote on the app via my phone but now, to make matters worse, one of the Roku units is showing it's not connected. Because it's not connected, I cannot use the app remote. I've unplugged and rebooted...again nothing. So now I have 3 remotes that don't work and a unit I cannot connect because I don't have a remote to access the "settings menu" on the screen to connect. Help!
The Premiere players all come with IR remotes. The Premiere+, some came with IR and some with WiFi Direct remotes. Both models will work with WiFi Direct remotes if you purchase them separately. And both will work with any Roku IR remote.
So, assuming your remotes are IR, there are only two possible problems, either the remote has failed, or there something blocking the line of sight between the remote and the Roku. First make sure that there's nothing in the way between your remote and the Roku that would block the IR signal. Now test the remote itself. You do this by looking at the front end of the remote through a smartphone camera while pressing any button on the remote. If you see a flashing light, the remote is fine. No flashing light, try new batteries.
Dan Roku Stick (3600), Ultra (4640), Ultra (4670), Ultra (4800), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Nvidia Shield, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.