Having the same.issue
Roku stick 3810x sn: C23796460526
With RC-AL2 remote
I've tried factory resetting remote, unplugging, new batteries, tried many methods of trying to get it to pair..and nothing.
I've tried pairing it close etc
I do have the USB cable with the bump in it as.well as the HDMI extender cable..I've tried with and without this cable, I've always tried hooked up to the cable w/bump. I've tried multiple power plugs, including a Roku power box, as well as other brands.with different amps..
I'm out of ideas.
Do u have any new ideas? Or how can I.get.a.replacement, or exchange?