This is not solved, followed stupid directions and app is still not working. Going on over a week now. Getting really really angry. This may be the straw that gets me to never buy another samsung product
Same problem here (Kauai, HI). I have spent hours on the phone and chat with Samsung and also with Amazon Tech support. Today I was on chat with Samsung and after going through the same shut down, start up, sign in again, yada yada and at the end of the session I was told that Samsung was going to issue a software update to the Amazon Prime Video app in the next two weeks. Anyone else heart this?
So I have been having a similar problem with the prime video app, however the screen either is completely gray and if I select whatever the cursor is on and that will play but it's a total shot in the dark or selecting the app only gets a flashing "prime video" logo and nothing less happens. Any suggestions?
Deregister Device AND (2) unplugging TV for 1 minute (+holding down on button for 20 seconds) worked for me too. Have to do this regularly for Amazon prime. Samsung should really sort this!! Very annoying.