Macbook Air 13-inch screen issue: Blue overlap with black stripes

Hello,

My MacBook Air 13-inch (mid 2011) has annoying issues with its screen for the last 8 months. Sometimes it happens suddenly, sometimes it happens when I bend my screen. I looked over the whole internet about this but can't find anything.

What it does, is showing a blue transparent overlay with black stripes. I need to bend my screen a lot or let it stand for a while to fix it. It doesn't always though.

It is really annoying!! Does someone know what it could be?

It looks like that cable or so is not connected well to the video card.

Here is a photo to show you the problem.