Just bought a new tv. Previous setup was vizio tv connected to vizio sound bar, with Apple TV connected to tv. No issues. New tv is a newer vizio, set up the same way, with the same sound bar and the same apple tv (3rd gen, fully up to date). Normally I turn on the whole system with the Apple TV remote and everything comes alive with no issues.
Get a code from Settings. 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. WSGZ9oW.