You will need
  • - new key or old, if it's not broken completely;
  • damp cloth or alcohol swab;
  • cyanoacrylate;
  • - screwdriver.
If the button on the keyboard fuse, try pulling it back or completely removed. For this fit a screwdriver or a thick needle. Insert the end of the tool under zapasow key and gently pull. Button to detach from the keyboard and POPs out of it. You should not do it too much, otherwise the key may be damaged permanently, and then you have to look for a substitute, which is sometimes quite difficult.
Next, take a damp cloth and better alcohol-saturated cotton wool, and remove dust residues and other dirt in the vacant niche. Blow this place, it must be absolutely clean. The same procedure done with the back button.
Assemble the cradle button. To secure you can use small amount of glue. Best for this purpose, suitable glue "super moment". Carefully drip one or two drops and wait until it all hardens. It takes no more than 1-2 minutes. Then attach the button to the cap in a recess of the keyboard. Press it until it clicks. Wait a few minutes and try the key in the work.