To test a fan, do not plug it into your mb but use your PSU for a power source. If your finger can spin it freely but 12 Volts will not make it go, you are looking at an electrical or electronic problem.
Diagnosis, prognosis, maybe treatment -- in that order. If the prognosis is hopeless, then there you are. In fact, No Matter Where You Go, There You Are.
Exactly what I wanted to know.
I forgot to mention that the rear AP181 had stopped spinning all of a sudden with no prior symptoms of a dying fan. I only noticed when I checked the RPM in SpeedFan (I had it at an inaudible 400RPM). I'll be setting fan RPM alarms from now on
The fan should have been receiving at least 11V - 11.5V, so I'm certain it must be an electrical or electronic problem.
Since the fan suddenly stopped spinning, I'm pretty sure it's an electronic problem. If I measured the voltage at the PCB of the fan and It shows 11V - 12V, would I then know it's the fans electronics that are dead? If that's the case, is there anything I could do to fix it? Or maybe salvage some parts?
I use a product called Zep 45.
Not cheap but a can lasts forever.
I spray some into a bottle and drip it into bearing. Have used it for years on all kinds of fans. Almost never fails to revive the dead and keep lubricating for long long time.
I'll look into this, but it definitely isn't cheap.
Based on what everyone has posted, I'll avoid using graphite powder in my fans. Is air tool oil fine to use?
Edited by nawon72 - 8/25/12 at 7:09pm