Squiggly line running down my screen

I've just noticed a random squiggly line* running down the screen on the bottom half center of my iMac (Intel Core i5 27 inch) screen. I don't believe I'd noticed it before, had this iMac for a few months now. It's very light, more noticeable when the screen happens to be dark but it's definitely there. It's not ON the screen, almost seems like its pressed between two plates if the screen were made of two plates. Tried different screen savers and desktops, it's most definetely there. Haven't had this iMac 6 months, am I still under warranty? And what with the squiggly line??? Anyone? Thank You! MG
*imagine a particularly intoxicated snail traveling from point-a to point-b and the line it would leave behind. THATS what it looks like. And no, a nail hasn't been anywhere near my iMac

"Squiggly line"? Only an Apple Tech can tell you. You have a one-year warranty. If you bought Apple Care, you have longer coverage. In any event, call Apple, tell them what you see, and when you bought the computer. It's really a matter for them to resolve.

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