Hi, I recently purchased an LG 42 RZ 42 PX11 and have been watching it on Dynamic settings (100 Contrast) from the outset. However, afetr readng a number of user postings, I understand that this item needs to be broken in on a low contrast and brightness level. I must admit I've not been happy with the picture and have sent this item back to LG four times since my purchase a few months ago. Do you think I may have caused permanent damage to the screen by watching on the Dynamic setting? Thanks in advance.