I've got simple and easy solution to solved this problem and not to mention it absolutely free, just need your time, screw driver and double sided tape...
My solution shown by video below....
Anyone who own Sony VAIO SZ/C/TZ series for more than 6 months, maybe (I think most of them) discover their Laptop sound become worsen everyday. Now my VAIO Laptop VGN SZ4-MN/B almost 3 years old, that sound very annoying... Finally I think I need to do something to reduce it atleast...
After a few days googling, there are too many solution.... it's seem common problem with this type of machine. Some say have to service or change fan, other says hard drive... but most common solution is to change that annoying fan.
Here the threads i've found (the most disscusses) :
http://club.vaio.sony.eu/clubvaio/GB/
http://forum.notebookreview.com/showthread.php?t=312303
http://www.youtube.com/watch?v=i9vHLwAbFxU
http://www.youtube.com/watch?v=qfOrH14bA7k
Here is my solution :
Equipment/Tools needed - Screw Driver Philips (+) , Double Sided Tape , player (optional).
Seems the fan cable accross and touch fan body, so vibration of fan with that cable produce that annoying sound. Just tape that cable fixed to the fan body, then no more vibration... and absolutely no more noise. But do not use salaphone tape, coz it just last for a few days (it become dry and loose again...).
That all...
see my website :
Isa wafeeq jump, aktiviti Isa
Have you ever thought why........ 1 means "one", and 2 means "two"?
The roman numerals are easy to understand but what was the logic behind the phonecian numbers?
It's all about angles !
It's the number of angles.
If one writes the numbers down (see below) on a piece of paper in their older forms, one quickly sees why.
An ancient phonecian manuscript explains this and I thought it to be fascinating.
Night at Piccadilly Circus, London

on Sony Vaio SZ CS B TZ series fan noise solving method