How to change the lens

How to change the lens

i droop my camera-lumix fs3 on the floor. I working but lens wont go out, is like is getting blocked in 1/3 of the way and than after 2 attempt it shows message to turn off the camera and try again. How to change the lens? as i open the camera and put it aparts and the internal part of the lens (the one i cant acces with 1.0 screwdriver) seems to be the part to change. thank you