What happens next?

How to reattach a keyboard key
Inspect the back of the key for damage.
Turn the key over to make sure that the part of the key that latches onto the keyboard is still in place. You should see a small plastic piece that will attach back onto the keyboard base.

Pick your answer from: a). Using your fingers or a special keyboard opener, peel off the tape holding on the parts that pop off. By turning the key upside down, you will expose the whole thing underneath, and the plastic will slide into place. b). Compare the key to the base of the keyboard where you plan to reattach it to make sure that this latch is present. If it isn't, then you may need a replacement key. c). A small metal piece is any piece that you can bend to reattach the key. It is important to replace the rectangular, plastic piece on the keyboard base to ensure that it isn't bent too far back. d). If the motor cannot be reattached, after careful reassembly, there may be some mechanical problems preventing the screw from securing the base. If the keyboard base does not come back on after reassembly, look for fingerprints or significant damage to the unit of metal it was attached to.
b).