Every now and then, when an Apple TV falls asleep with an app running, it wakes up without the app showing actual content on HDMI.
I’ve seen this quite a lot with the NPOStart app, but other apps suffer from this as well.
It happens more often with an Apple TV 4k than with an Apple TV4.
When this happens, the TV thinks there is no HDMI device connected to that source any more.
The solution is to reboot the Apple TV without active screen output:
- [WayBack] How to force restart the new Apple TV – CNET
To force restart the new Apple TV, press and hold both the Menu and Homebuttons. (The Home button has the silhouette of a TV or monitor on it.)
After holding in both buttons for roughly 10 seconds, the white light on the Apple TV box will begin flashing. Once that happens, let go of both buttons and the Apple TV will restart.
- [WayBack] How to restart your Apple TV – Apple Support
Use your remote
- [WayBack] Siri Remote or Apple TV Remote:* Hold down the
and Menu buttons. Let go when the light on your device flashes.
- [WayBack] Apple Remote (aluminum or white): Hold down the Menu and Down buttons. Let go when the light on your device flashes.
Unplug your Apple TV
If the Settings menu and your remote don’t restart your device, unplug your Apple TV from power. Wait six seconds, then plug it back in.
If the remote refuses to connect, then you have to pull the plug and reinsert it; either the power or HDMI plug will do.
Luckily this workaround I did not have to reboot my TV, as the only two ways to do that is to pull/reinsert the power plug, or to perform a [WayBack] How do I perform a Factory Data Reset on my Smart TV? | Samsung Support Australia.
–jeroen
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