my laptop is now silent (its nice but the damn thing gets very hot) so im sure the fan is either disconnected or broken. but i have also upgraded to windows 7 so im not sure if i needed to update the driver. it stays on for 15-20 minutes then automatically shuts off. can anyone confirm that the part number is 487925-001 because I have yet to open the laptop. also, does anyone have instructions on opening the laptop? thanks!