MBP 2011 13" screen issue.

I have a Macbook Pro 13" from 2011, with Intel Core i5 and HD3000 graphics. Since a week ago, the screen has a color tint. First it was green, now bluish. Red is rendered as gray-black, and blue, intermittent horizontal lines are displayed most of the time, especially when I change the screen orientation.
Random artifacts are displayed as well.
This problem appeared without apparent reason, once I took my macbook (which was in standby mode) out of my suitcase after a travel.

Displaying stuff on an external monitor works just fine.

Should I change the logical board/display cable?

 

I reordered the LVDS cable, and was prepared to change it through an hellish procedure (link), but when the Mac was opened, I simply moved a bit the LVDS connector on the logical board, and it was magically fixed.
I wasted 25€ on a LVDS cable on eBay, but it was still better than wasting 400€ on a new display I guess.
Curious thing, the Genius at the Apple Store told me that it tried doing this as well, but didn't work.
Tried upselling me the whole monitor I guess. That's so lame, I didn't want to spend that much anyway.