so it pushes down and all? make sure that the button is pushing againt whatever sends the signal to the computer that it's been pressed. It might be a little mechanical button that pushes down, or some sort of metal or electric strip. If you can't get a clear view of that, then open up the laptop to reveal the inside part of it. If you still can't figure it out or really don't want to do that (I don't see how you can cause damage, as long as you put it back right. It will just be like some screws you unscrew and the part will probably come off so you can look inside), then I'd just send it in or go to a reputable electronics or hardware store and get some help.