he XR15 remote controls your Xfinity X1 cable box, but it does not
pick which input your TV shows — that is set on the TV itself. If your
TV is showing Roku, it is currently on the Roku input (built into a
Roku TV, or a Roku device on another HDMI port), not the HDMI port
your Xfinity X1 box is plugged into.
To watch Xfinity, press the TV Input button on the XR15 remote (top of
the remote) to cycle through your TV inputs — HDMI 1, HDMI 2, etc. —
until you reach the HDMI port your Xfinity box is connected to. Wait a
few seconds on each input for the picture to appear. If the TV Input
button does not change inputs, the remote may not be paired to your TV
yet: with the TV on, press and hold the Xfinity and Mute buttons
together for 5 seconds until the light turns green, then follow the
on-screen prompts to pair it to your TV.
Once the TV is on the right HDMI input, the remote will control the X1
box as normal.