MacBook Air Screen Issue

Has anyone ever encountered a rainbow-ed area of their MacBook screen (I've tried to attach an image)? I saw some posts on the Apple support forums which suggested resetting PRAM via a keyboard shortcut during startup but it didn't seem to work for me.

Is it better to just take this to the Genius Bar? I've had the laptop for less than a year? It's the Mid-2012 MacBook Air