My Apple TV 3rd Generation will not allow me to change Network Password

I’ve tried this from another discussion “After you changed the Wi-Fi password …”

Hey, that sounds like something I would write. ☺️

That was accurate for Apple TV (4th generation or later) with tvOS 12.3 (2019).

The software on Apple TV (3rd generation) may behave differently, and I can’t test that.

BUT it won’t ask me to enter a new password.

You may have to try to connect a few times repeatedly, before Apple TV realizes that the memorized password is not going to work, and then it may ask for a new password (untested).

Or change the SSID network name on the router as well, as suggested in that other post.

Or try to connect to Other network, as suggested in that other post, then filling in the credentials manually.

It also doesn’t allow me the option to “forget this network” so I can re-enter my wifi network with my new password.

Forget This Network is only available for networks that you are currently connected to.

I’ve also tried resetting and restoring factory setting with no success.

All that in the other discussion and the above, was about avoiding a reset/restore. After a reset/restore, old networks or passwords should not be remembered, and the device should be able to connect as new. Something else may be happening.

When I’ve tried a Ethernet connection, nothing comes up on the screen, (yes! I did check my input settings) no Apple TV basic menu, etc. Is my Apple TV 3rd Generation dead?

How do you get to Network Settings, when nothing is showing on screen? That doesn’t change with ethernet vs. Wi-Fi.

Is the status light glowing continuously?

If your Apple TV doesn't turn on - Apple Support

Verify the WPA protocol used on the router. It may be too new for the Apple TV (3rd generation). If set to WPA3, then try setting to WPA2+WPA3 or WPA2. There may be sub-choices for Personal/Enterprise and AES.