First off, i have been coming here for the great info for awhile, but never needed to post. I'm hoping some one might lend me some good advice on a display issue. I have what looks like a shadow of a wire behind the display of my late 2009 iMac. I have recently noticed it, and it's kinda bugging me. It's not like a persistent burn in from an image. But it is persistently reminding me it's there. Could this be some hardware. It looks like a water mark on the screen running up and down squiggly line about 1/4 thick, 8 inches long. Thank you in advance for your thoughts.