my old Apple TV box will not accept my new password and when I try to enter the code sent from apple notifying me to the new device, and asking me to enter my password and then the code, it will not accept that either... suggestions?

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.

OMG thanks for this tip. I’ve been trying for days. It worked like a champ!