I’ve got Apple TV (2nd Generation): Model: MC572B/A or A1378
it was working with previous router and Wi-Fi. I changed the Wi-Fi and now it doesn’t work at all .
Possibly the new Wi-Fi connection is set up as using WPA3, causing an incompatibility.
For Apple TV (4th generation or earlier), verify that the router or access point isn’t set to use WPA3, as only device models from ~2018 or later support that. Instead use ‘WPA2/WPA3 Transitional’. Some users report that they had to set ‘WPA2’-only first.
Also updated with new connection. Main menu is empty,
An Apple TV (2nd or 3rd generation) without functional internet connection would only show Settings and Computers. All the other apps are loaded from remote servers. Fix connectivity first.
… activation is failed
Activation comes from registering the device with a valid Apple Account during setup.
There is a workaround if it keeps failing despite good internet connectivity.
A failed activation causes issues for both on-device apps and AirPlay. You can’t skip this step.
… use Ethernet cable
That should work when the Wi-Fi connection is difficult or impossible, or when wired is otherwise preferable.
I can’t register it on iTunes and iCloud either
After setting up with good functional internet connectivity, you can sign in for iTunes services, using a proper Apple Account, and a workaround for two-factor authentication. However, this model doesn’t support iCloud services anymore. iCloud has changed, but the system software for this model hasn’t changed with it to accommodate for those changes.
It is a device from 2010 and software from 2014, with much reduced capabilities in 2025 (several [most?] services have abandoned support for these legacy models). It has had its run. Do consider upgrading to newer hardware. The functionality is so much better on modern models.
