My Sony TV will not accept my Apple ID to sign into apple TV

You may need to enable 2 Factor Authentication on your Apple ID and create an app specific password to use. If your account won’t allow 2 Factor Authentication, try 2 Step Verification. The change was only supposed to affect 3rd party e-mail programs, but others have posted the same problem when using older OS/IOS versions of Mail and Calendar.

Apple ID -Two-factor authentication     *     

ASC YouTube for what is two-Factor Authentication

 Two Factor Authentification availability.   *

2 Factor Authentication - How to generate a recovery key  *

 Apple ID - Using app-specific passwords.   *  

Apple ID - Two Step Verifications FAQ    *