I have a new powerbook 15". The left arrow key that says home on it popped off. The "scissors" or "white plunger" mechanism is still attached to the key, and is in proper working order. How do I go about reattching the key? I already looked on apple.com/support, but the guide there seems to be only applicable of the scissor mechanism actually came off the key itself. Thanks so much, I dont want to have to take a trip to the apple store.