Yesterday I noticed that there was something rattling inside of my (ibook G4) computer screen...whenever I move the computer -turn it over or side to side, something rattles around in there... The only thing I can think of is my microphone-but that hasn't been working for the past 6 months and I only starting hearing rattling noises yesterday. Does anyone know if this is serious? Is there anything that it can destroy inside of my screen-whatever it is-if I don't get it fixed?