Default weird screen problem?

Today i noticed a weird Vertical banding. It is really irritating me.. What can it be?

Well i set the auto brightness to 100% and opened a 1080p movie on Youtube.. It looks like there was a long vertical line sleeping, for now it is almost gone (only when playing a movie).. help is advised from you guys.

Edit": 22-3-2014 It is BACK
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