I have the same problem for Sony VGN-S460 heatsink fan problem

Fan grinding sound usually comes from the fan that sits atop of the CPU. Get the CPU fan replaced cause the bearings are going bad.

The sony VGN-S460 seems to have an inherent problem with their cpu fans. It is apparent that the fan uses a ball bearing system which over time becomes worn and causes the grinding sound.

The only solution is to replace the entire fan assembly as they are inseparable.

Try looking here:
http://www.insidemylaptop.com/category/7-sony-laptops/

Possible clock timing of CPU is wrong. Is it two fan on this laptop? Maybe one is not functioning. Plus check your power supply if gives correct power!.. If none of this , it comes to the MB and possible a CAPS making problem. Need expert.
JMC

dowlnoad the service manual here:
http://www.eserviceinfo.com/downloadsm/36861/Sony_VGN%20Series.html

cheers

the fan is screwed together with the motherboard, the only way i figured is to separate it is completely unscrew the motherboard, cd drives.....then unscrew the fan from the bottom side of the motherboard....

i took the fan out just today, wantted to add some lubricating oil to it, but then can't manage to separate the blades & expose the centre

how much did the replacement fan cost? i am in canada, not even sure sony stores here have it.

then if that is the problem to your pc then turn your pc upside down and dissassemled the screw at the back then your keyboard should be lift up slightly and if you can not do that on your own try to contact someone in that field to help you but just for you to tell the person that you know what is wrong w2ith the pc the person should try and check if there is anything too close to the fan that the fan is touching and if there is nothing the fan is touching and the noise continue then change the fan with a new one. bye any question again.

Hello

I would not suggest yo uto luricate the fan but if yo want to, you will have to take palmrest off, first of all you will to take keyboard off to do so there are two screws on each side of battery take those screws off and then in battery compartment you will see two black plastic Knotch push those back one by one and keyboard will come off now unplug two flex cables one for power board and one for mouse pad also unplug the speaker wires on left hand side now take all the screws on top of palmrest and then close the lid and flip laptop over and take all the screws of n bottom and your palrest will come off and you can see the fan.

Thankyou

The Crucial website suggests you can put 1GB in each slot. http://www.crucial.com/uk/store/listparts.aspx?model=VAIO%20VGN-S460%20Series Sony might know which CPUs will work with this. Hopefully any Pentium-M with 533 FSB.

check adapter output also may be problem with dc socket on laptop loose or somthing.