Trying to set up an old Apple TV 2nd generation but it will not recognize my sign in ID or password

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.

My TV lost power, when it was restored the Apple TV+ app on my fire TV stick would not recognize my Apple ID and password. Resetting my password did not work.