Hello, I’m Nathan, and I’ll be assisting you today. My livelihood depends on your positive feedback, so your satisfaction is my highest priority.
Sorry to hear you’re having trouble, Pat.
The roku does not connect to your xfinity box at all.
It needs to connect directly to the tv, preferably via hdmi though.
If you can't use hdmi, then put the red to red, white to white, and yellow to green.
Turn the tv on, and set it to the AV (video/composite) mode.
If no change, let me know the complete model number of the tv.