I sent my powerbook to Apple to fix for me the other day because whenever I would pick the powerbook up it would make a horribly loud and unusual grinding sound, yes I said grinding sound! And, no it is not the HDD sudden motion kicking in. Anyway, my status is "repair on hold, part on order." Based on the sound I was describing, can anyone offer an intelligent guess as to what part would be on order? Second, does anyone know how long it takes for parts to arrive, i.e., am I looking at a significant set back now in repair time?