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
Attached Thumbnails
Click image for larger version

Name:	IMG-20140321-WA0006.jpg
Views:	133
Size:	102.2 KB
ID:	2642821