I have had a LG C9 for the past month or so with over 500 hours usage time. My return timeframe technically ends Wednesday, but Best Buy has extended all returns of recent purchases to May 31. Overall, I have been happy with the TV, but I started noticing "flashlighting" in the lower left-hand corner. Knowing that flashlighting does not occur with OLEDs (but having had it horribly on some LEDs), I did some research and came upon 5% greyscale test screens. Mostly, I found the 5% to look decent, though 2% had some banding. However, after reading a post here about setting the OLED light to 30 to 40, I retested and was not happy. In regular content, the only problem is excess brightness in darker scenes in that lower left corner, but in the 5% greyscale I can clearly see that corner lit up.
Before I pull the plug on getting it replaced, I thought I would get some feedback on the panel. Any thoughts would be appreciated.