Worked for me, too! After many attempts (powering TV off, bouncing back and forth between TV apps, etc), came here and found this solution. Took a while to locate the Deregister screen in Amazon Prime account, but this fixed the problem immediately. Thanks!
Couldn't find deregister. Tried unplugging, holding power button down checked software update nothing worked. Next morning unplugged for about 20 minutes, held power button down a couple minutes before plugging in and again after plugging back in then it finally came back on.
Yeah this did not work for me nor does any of the other troubleshooting suggestions. I have Un65nu6900 and I guess it's just a peice of sh$&. Have issues with Disney app as well.
So frig'n frustrating.
How do you sign out when it won't even load. Get the spring wheel and nothing else.
Okay, it looks like nobody here has a solution. But I just got another email from Samsung Support with the following suggestion.
"I suggest you to sign out and sign back into the app.
To sign out, select Settings [on Amazon account], from the left menu, and then select Deregister your Device. Close the app, reopen, and then enter your credentials to sign back in."
That worked! I now have Amazon Prime Videos back and working.
Thank so much. This finally worked. So frustrating... Had to unplug TV before the de-registration would show me a new code on the TV...but that did the trick and allowed me to sign in again...
I tried all of the above with no results. My tv showed the prime icon on the screen however, when I selected it the screen went black, no connection at all to the app. The only thing that worked was signing out of prime on my phone and performing a factory reset on my TV. Then the TV was able to connect to prime and I reconnected it to my account. 😃
Can I do this on the Amazon app on my iPad or must it be done somehow on my Samsung UE43RU7400. (2019)
Any help would be much appreciated as this is driving my husband mad because I can get Amazon Prime no problem at all on our older Samsung TV upstairs.