Technology
Non-working Apple TVs can be repaired directly using an iPhone smartphone, thanks to iOS 17. The new software will attempt to 'restore' the device if an issue is detected that prevents the Apple TV from starting up.

'Repair' Apple TVs with iOS 17 ease
Many innovations have come to iPhones with Apple's new iOS 17 operating system version. One of these was the ability to repair a broken Apple TV device using an iPhone.
Now, in case of a software problem on an Apple TV HD model with tvOS 17 installed, an iPhone image will appear on the screen. This warning indicates that the device is currently unusable and needs repair.
APPLE TV CAN BE REPAIRED WITH IPHONE
To recover Apple TV using the restore method, it will be enough to unlock the iPhone and bring it closer to the device. When you click on the 'Recover Apple TV' button that appears on the phone's screen, iOS 17 will try to fix whatever problem occurred on Apple TV.
On the support page containing information on the subject, Apple tells its users that if these steps do not work, they should contact Apple technical service.Ease of 'repair' for Apple TVs with iOS 17
Before this update, when Apple TV models with a USB-C connection port broke, they could be fixed by connecting them to a Mac computer. To fix models that did not have any USB sockets, the only option was to take the box to Apple's authorized service centers.With the combination of iOS 17 and tvOS 17 versions, this obligation has been eliminated. However, there may be a problem with your Apple TV that is too big to fix with the 'Restore via iPhone' method. In this case, you should still contact Apple Support, but for smaller problems this will no longer be necessary.