Hi, I dont know how to fix this. But my down-arrow-key is not working. It has been dead for along time. I have restarted the computer of course. I have taken off the little thingy to see if anything is stuck underneath, but no. I doesnt matter how hard i hit it. The guys at the apple store havent heard about the problem before... Im going sell my powerbook g4 15,4 1gb (!!!) computer soon but it sucks to have one dead key.. whattayathink?