A broken display can feel stressful, but there are a few things you can do with your TV if it has a black screen before taking it to the repair shop.

The failure screen confusing includes no text telling you what to do; just a black-and-white drawing of an iPhone in front of an Apple TV puck. This issue can arise on Apple TV HD and Apple TV 4K.

If your Windows computer screen goes black & white when HDMI is plugged in, reinstall the display driver, perform calibration, reset control panel settings, etc.