I bought my panel about a month ago but only got it fired up about 4 days ago.. still in it`s box though. I`m a bit concerned with a dark bar, which goes across the full width of the screen, about an inch wide, at the top of the screen. I`ve only had the screen on for about 8-10 hrs in all. I`ve taken all the advice given and turned the contrast down to -25 and been running in a full screen mode. It is very noticeable when the panel is switched off. The bar is much darker than the rest of the screen. Any help or advice would be much appreciated.