XBOX One Black Screen with flickering Green band

Hello dear Gamer, first it's a pleasure to be able to help you today.
My name is Vinicius.
I am a gamer and independent advisor on the XBOX community platform.

Hey ChrisHildebrandt1, how are you today? Hope you're well.

What you can do is this to test:

So, let's try this:

If your console is a digital version, try this way:

1. Turn off your Xbox completely by holding the power button for 10 seconds. Unplug it from the wall, wait for 1 minute, and plug it back.
2. Press and hold the Sync button.
3. Press the power button, and keep holding the Sync button.
4. Keep holding the Sync button, until the troubleshooting menu appears.
5. Select the option "restore this Xbox" and choose to keep my games and apps.

If your console is not a digital version (Has the disc reader)

1. Turn off your Xbox completely by holding the power button for 10 seconds. Unplug it from the wall, wait for 1 minute, and plug it back.
2. Press and hold the Sync and Eject buttons.
3. Press the power button, and keep holding the Sync and Eject buttons together.
4. Keep holding the Sync and Eject buttons, until the troubleshooting menu appears.
5. Select the option "restore this Xbox" and choose to keep my games and apps.

If that doesn't help, test others HDMI cables and even connected to another TV or monitor, if the same thing keeps happening, it could be a hardware issue on your console, more specific in the HDMI input of the console.