Why doesn't Apple TV connect with iTunes ?

Use Home Sharing to share media from a computer to other devices - Apple Support

Use the Computers app to access the shared library on the networked computer.

For investigative testing, please try the reverse (AirPlay push vs Home Sharing pull), as that uses the same networking connectivity. That will let us know if the networking connection between the two is fully functional (without relying on Home Sharing settings). Get an audio file into your iTunes library, e.g. mp3 or m4a. Use the ‘AirPlay’ button (Audio Output Controls) to select an AirPlay (or Bluetooth) speaker, in this case the Apple TV box, if detected on the network.

• If that works, then you won’t have to doubt your network settings for this issue, and we can concentrate on app settings.
• If that doesn’t work, then you’ll have to change something in your home network, for both AirPlay and Home Sharing to be able to work.

Let us know how that goes.

"Can your iPhone’s TV app access Home Shared videos from the PC?"--------NO

"Can your iPhone’s Music app access Home Shared music from the PC?"--------NO

Based on this, the LAN connectivity issue is likely with the computer (or iTunes application). Then the Apple TV box is likely just fine.

Is the Apple TV box still properly activated? If not, then it would be mentioned in Settings﹥General﹥About﹥Activation: Failed."-------THROUGH THAT PATH AN THE END THERE IS NO 'ACTIVATION' ITEM.

Then the activation (registering with an account) of the Apple TV box is fine. Jay!

A tech will be contacting me today …

I hope you find it. Good luck!

In your image it shows 'Computer' and 'Apple TV 3'... I only have one, for computer.

Thanks, that is what I wanted to find out. The iTunes application is then currently not able to detect the Apple TV box on the home network.

I can Airplay to TV with my phone, no issues there.

Thank you, that is useful information.

As a test, please try home sharing from the iPhone (instead of the Apple TV box). Can your iPhone’s TV app access Home Shared videos from the PC? Can your iPhone’s Music app access Home Shared music from the PC? If that works, then it confirms that iTunes on the PC is fully functional for Home Sharing.

The Tech advised that it was most likely due to an update software in iTunes or Apple TV.

I am of a different opinion. It should still work, as it does for many other users. I would advise to keep your software up-to-date on all devices.

Download and use iTunes for Windows - Apple Support

Update your Apple TV - Apple Support

What needs to change?

Possibly the PC blocks certain ports or network connections. But you said that any such services were disabled on testing.

Possibly the router stopped bridging locally for certain device connections. Have you tried restarting the router? Have you checked for router settings that may influence local routing? (E.g. so-called Guest-networks will offer internet access without local connectivity between devices.)

Does the Apple TV box work for other services than the Computers app? Can you access the iTunes Store Movies ‘app’ and browse there? If you have purchases there, can you play them directly on the Apple TV box (no AirPlay)? Is the Apple TV box still properly activated? If not, then it would be mentioned in Settings﹥General﹥About﹥Activation: Failed.

On the Apple TV box, in Settings﹥AirPlay﹥, are you signed in with the same Apple ID as used in the Home Sharing setting in the iTunes application on the PC? Only matching accounts can do home sharing.