A friend was just given a PowerBook G4 in perfect condition (seemingly). It has just been sitting on a shelf for several years and worked fine before it was shelved. Now when she plugs it in, the orange light on the cord lights up orange, but when she tries to boot the machine, nothing happens. I mean nothing. Is there something simple that this could be? Wondering if there is a little battery inside that is needed that could have gone dead over the years of idle sitting, or something like that. I just don't know PowerBooks very well. Any and all help appreciated.