I bought a new Samsung TV (UN50KU6300F) in 2016 and it has served me well... until recently.   Several months ago, the TV started to develop little white circles or rings on the screen, which were aligned in a grid-like pattern. They weren't terribly hard to ignore since they only appeared when the screen got bright. However, over time the circles became more pronounced and have gotten to the point where they are downright intrusive to my viewing experience no matter the brightness of the screen. I looked this issue up and it seems to be related to the backlight. Is this a known fault with this model or with Samsung TVs in general? I spoke with technical support and they said that this is not a known issue and that they were unable to help. So am I just unlucky, or has anyone else experienced this with their Samsung TVs?   This TV brand new at the time of purchase and has been taken very good care of since I got it, so I don't think anything I did could have caused this issue to come about. This was the first Samsung TV I've purchased for myself and it may be the last. Which is unfortunate, because up until now it's been a good TV...   I'll include a pic of what I'm seeing in case anyone else has something similar going on. The two clearest circles. If you look closely, you can see many more dimmer circles arranged in a grid-like pattern. ... View more