Symptom

When switching to an Apple TV, you get a blank screen or a No HDMI Signal message on the TV or projector display screen.

Quick Steps

Wake with the TV Button Typically, you can wake an Apple TV from sleep by tapping any button. For clients who are comfortable using touch interfaces, the TV Button on the Transport slide can wake an Apple TV when no other button seems to work.

Set Apple TV to Sleep Never

Apple TV can be set to Sleep After = Never to prevent it from going to sleep at all.

This mode uses more energy, but the amount is modest relative to other devices in the home. (Example: an Apple TV 4K could use approximately 36–72 watt-hours per day)

1. On the Apple TV, go to Settings > General.

2. Set Sleep After to Never.

Animation of above process on Apple TV: