Green screen on AppleTv 4K
My AppleTv 4K displays only a Green Screen and is frozen
Apple TV HD, tvOS 11
Question marked as
Some TVs may display a blue or green screen if they receive no signal from a connected HDMI device. The Apple TV box is not known to transmit a green screen at any time.
Do verify the HDMI connection. Disconnect the HDMI cables on both ends, then reconnect.