Hey everyone so I just had this problem and after about 2 hours I got netflix to work again. I simply unplugged it for 10 seconds while the tv was on and the plugged it back in. Netflix is now working as good as before. Hope this helps.
I was able to watch Netflix on my Samsung Smart TV until about a few days ago.
Now, when selecting the Netflix app from SmartHub, my screen goes blank and nothing ever happens. It is as if the app is not being loaded.
All other apps in SmartHub work just fine (including HuluPlus, Amazon, Pandora, etc.).
And I can use Netflix on my iPhone so I know it is not the wireless network.