So, now I do not have F4.

It can not be put back, the small parts that were holding it together are broken. Great! Luckily, one does not need F4 that often, and the button still can be activated…

I am covering my keyboard now when I leave the laptop open. I can not close it really, since one of the Siamese broke one of the hinges that hold the screen, I have to replace it… :/