It is a bit tricky and the service manual is a bit confusing. The fan itself is enclosed in a heat exchange assembly and the whole assembly has to be replaced. If you are in luck you can purchase the whole assembly from china for 20$ including P&P. I purchased mine from wishingdeals on ebay their contact information is as follows: 91deals Wisshen Inc www.wishingdeals.com Skype:Wisshen MSN: sales@wishingdeals.com The plastic parts you disassemble are fragile so you should take care. You begin by taking off the rubber pads on the screen (they don't seem to come off but they do) beneath them you will find the screws. Unscrew them. By doing it you can take the screen off the hinge and that will allow you to unscrew the hinge itself, slip off the keyboard and disconnect the keyboard and screen connectors. Now you have access to the motherboard and the screws that fasten the plastic cover/frame. Remove the plastic cover/frame (a bit tricky) and then remove the motherboard. You may need to extract the CPU before...