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[Smoker1]

OK, not sure what the problem could be.

I Purchased a 24" ONN Roku TV at Walmart for the Kitchen at my Residence. 

Connected XFinity X1 Box to HDMI 1 (have also tried the other 2 HDMI Ports as well, same result)

If I unplug the Xfinity Box, then Power it on after 10 Seconds, I get the Welcome Screen (3 Languages), then it will go to a Black Screen after a while.....then it will be a Blue Screen.

I have used 2 other HDMI Cables. 1 had the same Issue, the other (Brand New) did not work. I plug the Xfinity Box back into my old TV, and it works perfectly fine, Picture and Audio. With the ONN TV, I can connect a USB-C Hub to my Phone, and plug in a HDMI, which works perfectly fine. With the Blue Screen Issue, there is no Audio either. 

I also connected the ONN TV to the XFinity Box in the Living Room, but that also had a Blue Screen.

Is this a TV Problem, or XFinity Box-s Problem?

EDIT: Just connected the ONN Roku TV to my Laptop with a HDMI. Works perfectly

[RokuArjiemar · Accepted solution]

@Smoker1,

We appreciate you posting in the Roku Community!

Thank you for contacting us regarding the blue screen issue you're experiencing on your Onn Roku TV when connecting it to your Xfinity Box.

If you're encountering an issue with your Roku TV manufactured by a Roku partner, start by contacting the manufacturer. Each TV manufacturer provides direct support for its models. 

For support regarding Roku TVs, please visit our support page: Where can I get support for my Roku TV™?

For in-depth instructions when making connections, completing the Guided Setup, using features, or configuring settings; refer to the Roku TV User Guide.

You can also ask for further assistance with the Xfinity Box since it is having the same issue connecting to other TVs.

Please feel free to let us know if you need any additional assistance!

Thanks,
Arjiemar