Hi All, I have a 2011 iMac and i have a weird issue with the LCD. On the left hand side of the display, there seems to be a dark ribbon. It has been like this for nearly 2 years and luckily hasn't got any worse. It doesn't cause me any problems, but i'm wondering what on earth it could be. Anything shown on the display still shows up through the dark area itself as shown in the video by my mouse pointer. The display backlight is fine for the rest of the display so i'm perplexed as to what it could be. Please see the video i have uploaded to YouTube to see the issue. Thankyou!