Backlight flickers randomly, pressure on the keyboard helps.

Hi everyone, so I have a problem with my macbook. I don't have applecare so i'm trying to fix it myself.

Basically the backlight flickers, as if the inverter or a cable was not seated correctly. however I opened it up and reseated everything and the problem is not going away. Also If I press on the keyboard or handrest (or sometimes even typing) the screen will flicker.

Apple replaced the logic board about a year ago because of a bad nvidia chip but it doesn't look like it's the same problem, this looks more... mechanic.

Anyway, I took a video of the problem.

here,

http://www.youtube.com/watch?v=MvL6G5jju...

Please, any help would be appreciated a lot!!!