my CTRL and SHIFT buttom (left side) has diffent sence

[biijan]

Dear friends
I just received my x220 laptop. as the box has some damaged I checked the laptop but everything was fine. the only thing I am worry about is when I push the left CTRL or FN or Shift buttom it sence different that othre keys. it is softer to push and sence like it has used more!!! or is deeper... I don't know. any body has any idea?

Thanks
Bijan

[hyde]

Just re-seat your keyboard. I had a perfect keyboard until something happened one day and I started feeling a hallow space beneath my lower left key trio (same keys you mentioned) they started making much more noise as if they were raised and it was more "clicky" I had no problem with it until I had to replace my palmrest for a different issue and realized how much quieter and comfortable the keyboard was (it somehow fixed itself when I removed and installed the keyboard).