One day I switched my PowerMac G5 (Late 2005) on and it was producing lot more noise than normally. After opening the case, I found out that one of the CPU exhaust fans was spinning on full speed. First I tried restart, SMU reset, PRAM reset but nothing changed, so I realized it must be HW problem. I asked google and found some interisting pics:
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| 6-pin connector for both CPU exhaust fans |
First pic is from
page where user Nico shows hwo to rebuild G5 to a Hackintosh. On the picture he shows how to use the original (G5) fans.
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| How are the two fans connected to one connector |
Second one is now available only in google cache, originaly from
some phorum.
First I found out which of the fans is broken (A or B according to the second pic), than I played with the wires and after many tests I finally found out that pin 6 on the mainboard wasn't working correctly.
So my solution to fix this:
As the noisy fan was B in my case, I connected its red wire (according to the second pic) which is +5V to the pin 2 (another red wire). Now I have both fans running on one +5V feed line and they are spinning normally (quietly) again.
I have a dual fan from a PowerMac G5 and they are 12v nor 3v. It use the same 6-pin connector. Is the voltage different depending upon the G5 year model?
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