Oh okay, I earlier had a sony lcd which had a perfect black sceen in dark and when I bought lg i quickly found out that something is not ok with the panel, then after researching i found its called light bleed, i had a small 1" light bleed patch in the corner and i mostly watch tv in dark room at night so it was quite frustrating for me and i being very picky about perfection I complained it to my dealer, my dealer told me that he had not got many people complaining for this issue even if they were experiencing it, but he was quite generous to solve my problem.