I just plugged mine in for the second time and nothing. Doesn't work at all. The light is on but nothing shows up on the screen. Yes, I checked the HDMI connections, which works fine for my Roku; yes, I restarted it; yes, I did the test thing. But I guess I'm not gonna be able to use it, or Peacock.
It would be nice if Comcast offered an e-mail address or a way to do a work ticket when these issues arise. Our only choices are Facebook, Twitter and some other social media tools I do not use.