How do I turn on Dolby Vision on Apple TV 4K?
Go to Settings > Video and Audio and select Check HDMI Connection. 4K video, especially HDR10, HDR10+, and Dolby Vision, requires an HDMI cable compatible with these formats. Apple recommends HDMI cables that have the Compatible Dolby Vision mark as they have been tested with Apple TV 4K and a wide range of TVs. Does Apple TV 4K...