In message , The Natural Philosopher
writes
Wesley wrote:
It starts a few minutes after bootup. If I touch the casing it
abates or stops only to start again a few minutes later. I have a
feeling its the fan as I had a similar problem with a PC some years ago.
Is there an easy cure short of replacing the fan?
yep. Open her up, blow the crap out and one drop of light machine oil
on any bearings you can access.


May be the smaller fan on the graphics card.
--
hugh