On Sat, 30 Apr 2011 14:28:38 -0700, Oren wrote:

On Sat, 30 Apr 2011 16:14:55 -0500, Steve Barker
wrote:

probably the fan ontop the processor.

thermal grease dried up.
It's not thermal grease in the fan motor, but the grease does have a
tendancy to dry out in the heat. A drop of turbine oil or other fine
lubricating oil (NOT WD40) will usually solve the problem for a year
or two.