Plain and simple your fan is due for replacement.
Taking a laptop apart is not advisable unless you really know what your are doing (seriously)
I want to give you the best advice I can and asking you to do the repair yourself is NOT one of them.
Take it to a repair shop, the money you spend, will be worth the trouble you save yourself.
Laptop computers are put together with many small screws and hard to replug ribbon wires, many times inexperienced people do more damage then good attempting this proceedure.
My advice to anyone is to take apart an old laptop that does not work, for the experience of how the proceedure is done.
Add-in) I just want to say, it takes one slight wrong move to destroy a connector or crack the flat ribbon wires (those are unrepairable once they develope a crack) Solder won't adhire to the traces in ribbon wires, so they are basically permanently damaged.
Dissasembling a laptop takes a lot of experience and patience and theres too much room for risk of damage.
Sorry I ranted like this, but I think my advice is your best bet, if you intend on this laptop being usable after the repair.
I do repair laptops, most were damaged by inexperienced people attempting their own internal repairs which requires removing the main cover and several modular circuit boards.
Edited by MrBruce1959, 01 March 2010 - 09:54 PM.