Thanks to you, I have repaired my keyboard! Hope it will not break for a long time. I haven't any screws in the lower housing. I put 4x screws on place (photo or if photo not working - top left and right corner + one hole down from them) and now all keys working! Hope it help for somebody. Edit Looks like problem is not solved fully, sometimes e,g,h,fn, num 8,9 and _ don't working, but it is 99% better now then before. EDIT2 Today I have found better place for "activate" keys. This is few centimeters on righ from touchpad. Little strenght put on plastic helps for me.