Did not call AppleCare, I called Netflix to due to the thread posts, however.....
I tried a last ditch effort before returning the device to Costco and, there is a secret sauce solution that is a last ditch solution that "should" work for anyone having this problem.
Last Ditch solutions step by step.
Start your Apple TV HD and go to the menu to reset your device.
- Select "Download update and reset"
- Follow the prompt to do a full download and reset and "wait". The system (depending on connection speeds) should take about 15 minutes to do a full wipe from Apple and restore the base operating system. With 1 gbs speeds that I have, the download was pretty fast (5 minutes)
- Once completed, the Apple TV HD should bring you to the menu for the original startup. So select your language and country first, then you will see the menu to use your iPhone (should you have one) to sync your device.
- (iPhone Setup for Apple TG HD) Unlock your phone, make sure you have a wifi connection and hold your phone super close to the Apple TV HD. Your iPhone screen "should" show the Apple TV HD and prompt you to "connect" to the Apple TV HD.
- Once selected, it should automatically download everything you had on your previous setup but it just takes a while depending on your connection speed.
I did this last setup (which by the way was not posted in anywhere in the form that I found) and though it took a while using just the Wifi in the house (20 minutes), once it got to the setup, it finally worked. Netflix is running once more along with my other services like Apple TV+, Disney, Hulu, Crunchyroll and so on but I made sure to check Netflix first to make sure.
So there you have it, a solution that does work but is a pain to do since you must sign back in to "all" of your services that you subscribe to.
All the best