Asus N75SF strange keyboard noise

Hello,
Im new to this forum, so im not sure if im posting at right section.
I have a problem with my keyboard. Keyboard bounces when i pres the "alt" and "space" buttons, also it makes a strange noise, when you release the "alt" key it sound like the keyboard was stuck and it just unstuck, and you hear a loud click noise. Im not sure what to do, also i would try t remove the keyboard and look wats wrong, however i have no clue how to remove the keyboard, it looks so complicated compared to my old asus laptops' keyboard.
Any ideas/help would be appreciated.
P.S. the bouncy area is where keyboard fixes to the topcase, there are like 5 of those at the keyboards' bottom.

 

If you look around the border of the keyboard where it meets the chassis, does it look like there is any space or tilted angle to suggest it wasn't installed correctly?

 

it looks completely ok, like all the other 4 spots where it meets the chassis. But only the second spot from the left makes that noise. The noise started today, there was no noise before. I can also see (when i press alt button) that the keyboard dents/moves a a bit at that spot.

 

If you press down with multiple fingers in that area, does the keyboard buckle?

The keyboard is definitely top-mounted, but I'm not entirely sure if the tabs that hold it in are accessible or if they're under that grille. Here's the highest-res photo I found: http://gentechpcforums.com/system-images/Asus/N75/Asus_N75_3.jpg

Do the tabs look like they're accessible to you?

 

It does buckle a bit.
Tabs do not look like accessible to me, it looks like that they are just bent under that grill. No clip which u can move and unfix the keyboard, like at older laptop models.
Edit: https://plus.google.com/u/0/photos/102296909073521287883/albums/posts I took few photos, im not sure if that helps tho.

 

I'm pretty sure i can see 5 tabs on top of the keyboard which would allow for it's removal. It's hard to tell without seeing the notebook in person though.

 

Im pretty sure that i need remove the grill first, because it is holding the keyboard in place. But now i have no clue how to remove it, any ideas?(dont want to break it) Maybe anyone tried to do that?