I got a six month old 50 inch Samsung Smart TV model UN50HU8550-FXZA. I had the Netflix problem. I would click on the Netflix app and the set would go into a limbo state, just a blank screen. I tried several fixes and finally found one that worked. With the TV screen displaying the Netflix app, I unplugged the AC power located on the back of the screen's case. I waited 10 seconds and then plugged it back in. It did the trick. Netflix came up when I clicked the app using the spotlight from that tiny remote. I almost was going to do a factory reset but since it took me quite awhile to get the picture parameters tweaked just right, that was to be the last resort. So, just unplugging the AC power from the TV while the TV was displaying the Netflix app, waiting 10 seconds, and then reinserting the plug into the TV's jack, got my Netflix app to bring up Netflix. Good luck.