Apple tv (device for streaming)
This device has worked for ten years. Recently it is demanding an Apple Id. done on a computer. I have done that and it will not accept this sign in.
Apple TV 4K (1st generation)
Question marked as
An Apple TV box from 10 years ago wouldn’t be an Apple TV 4K (1st generation) model. Those were introduced in 2017.
Identify your Apple TV model - Apple Support
Find your Apple TV model number - Apple Support
If it is an Apple TV (2nd or 3rd generation) [A1378, A1427 or A1469] (2010–2015) …
If you have an Apple TV (2nd or 3rd generation) and two-factor authentication for your Apple ID, then you may be asked to type your password followed by the six-digit verification code directly into the password field. Additionally, there is a time limit, after which the code becomes invalid.
Try this: First enter the characters of your password (do not submit yet), then manually request a new verification code, then append that code to the password (no spaces or other separating characters), and then submit. That should help you get passed the time limit.