Hello, since 3 days my display is in the left corner much dark than anywhere else and sometimes it's flickering. But only the backlight turns on and off. Graphiccard seems to be okay. I don't have any problems with the display. I think my LED backlight or the backlight board is defective. Our local Apple Service Provider made a quotation: display-change 670€ -that's too much. Since 2,5 month I don't have any warranty and i ordered no apple care. I thought its a 2000€ computer and should work at least 3 years without any problems. Now I have a problem. Is it possible to replace only the LED backlight?? What can i do to fix it?