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Eliminaing fan noise on G5s
Authored by: JonS on Aug 25, '06 08:45:41AM

There is another reason why the fans in a G5 will come on and stay on constantly for no reason (in particular especially after start-up) and it's decidedly low-tech.

If you've removed the clear plastic air deflector while delving into the internal workings of the G5, you may have damaged the white metallic self-adhesive strip attached to the lug at the base of the deflector. I think this strip forms part of a circuit which tells the G5 that the deflector is in place (as it should be) when the power is on.

A damaged strip breaks the circuit and convinces the G5 that the deflector is missing while the power is on and components are in danger of overheating. In response it switches all fans on to full. Smoothing out flat a wrinkled or torn strip can solve this problem.



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