Hi soplax,
I'm sorry you are having issues connecting with your Apple TV. I see you've tried several things.
For this particular error message, "Reset All Settings" usually works, so I would follow these directions first:
See page 31 of the Apple TV User Gide
manuals.info.apple.com/en_US/apple_tv_3rd_gen_setup.pdf
You can reset all of the settings on your Apple TV to factory values.
Important: This requires you to reenter all of your network and account
information.
To reset all settings:
Choose Settings > General > Reset > Reset All Settings.
If you still have trouble, try resetting your equipment by disconnecting Apple TV,
your TV, your wireless networking equipment or base station, and your router
from the power outlet. Wait 30 seconds, and then reconnect everything.
It also may be helpful to switch between a wired and wireless network:
Apple TV: Switching between wired and wireless networks
- Disconnect the Ethernet cable from the Apple TV.
- Navigate to Settings > General > Network.
- Click Configure Wireless.
- A list of available wireless networks will appear. Navigate to the network you wish to join and select it. If the network you wish to join is hidden, click Other and enter the network name using the on screen keyboard and the remote.
- When finished, click Done.
- If your wireless network requires a password, a keyboard will appear allowing you to enter the password using your remote. When this is completed, click Done. A "Connecting to wireless network" screen appears.
- When the operation is completed, a "Connection Succeeded" screen appears. Click Done. The screen should display the wireless network information, including network name, IP address, Wi-Fi Address, and signal strength.
To switch back to a wired connection, simply plug in the Ethernet cable. Apple TV will switch to it automatically. Apple TV prioritizes a wired Ethernet connection.
These are the first things to try. For additional Apple TV Support information, please refer to this website:
http://www.apple.com/support/appletv/
I hope this helps ...
- Judy