My 49uj6500 purchased in California at a Costco in September 2017 has developed a blue/purple discoloration, but only in the bottom left corner of the screen.
I usually kept the backlight in the settings to "auto" and this keeps the picture at moderate brightness, except for the occasional movie that's in HDR where the lights are really pushed. Has this shortened the life of the backlights?
For now, the TV is still watchable, but don't know for how much longer. I guess I shouldn't complain, mine has lasted longer than others here. It has almost 15900 hours power on time, according to info in the settings