Usually a louder fan means the fan bearing is starting to fail.
There is nothing to do for that except replace the fan. Usually it
takes a fair amount of time for it to fail and it will continue to get
louder but ...
db
Alvin Auerbach wrote:
My iMac is about 4 years old, and I think that the fan noise is louder
than it was originally. I want to open it up and vacuum the dust out
of it, but I recall reading that this may make a static electrical
charge that could ruin some semiconductors. I would like to know if
anyone has personal experience with this, either good or bad (I was
going to write positive or negative, but...); or is this just an urban
legend?
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