hi i just bought my pro 2 days ago, i already have a macbook and notice for a start how much cooler running my macbook is than my pro. however when my macbook does get warm i can quite easily hear the fan kicking in but i dont hear the same in my pro!! is this normal? does a pro not have a cooling fan? (surely it must right?) that coupled with the very annoying buzzing in the right hand corner (is that possibly the fan unsuccessfully trying to spin?) has me worried i may have bought a dud computer!!?? thanks for any help.