I have a Toshiba Satellite M35X. I hear a loud humming sound whenever i turn ON the PC and also when the laptop gets very busy. At normal processor speed the fans noise is very low. Is it due to the dirt in the fan or a malfunctioning fan? How many fans are there in this type of laptop. If incase i have to replace the fan, how do i know which one to replace (if there is more than one fan)?
Since the loud sound started occuring very recently, would cleaning extend its life or is it imperative that i get a new one?