Clean out the dust bunnies, I bet that will help.
Buffy ,'Potential'
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I've had fans go bad plenty of times like that, make noise for awhile then go quiet again. I just try to isolate the bad fan and replace it.
Yeah, try to dust it out first, definitely.
Yeah, there's a lot of dust. I should go buy some compressed air or something?
Yes.
Rock on. I hope that works. I just realized that one of the fans is the power source, and the power source died on my old computer several years ago. And you guys helped me diagnose the problem and replace the power source myself! I hope that's not the problem right now. I don't want to deal with that business.
Whatever you do, DO NOT put the computer in the blender!
One of the things to be careful about when you are blowing the dust out of the fans is to make sure that you are blowing the dust OUT of the electronics and not into them. In other words open the computer case and blow from inside the case to the outside. If the fans are on the power supply check to see where the interior vents are on the power supply and blow from inside the computer case towards the outside. I watch far too many people try to fix dirty electronics with canned air make the problem worse by blowing all kinds of crap right into the air intake.
Wise words.
Thanks for the tip, ND.
Also, don't forget to ground yourself before you poke any of the computer's interiors.