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Why is my G5 drive bay fan speeding all the time
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Fresh-Faced Recruit
Join Date: Jun 2007
Status:
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My G5 tower is one of the early models.
Today I turned it on. Immediately the drive bay fan was running at maximum speed. The Mac's temperature was cold as it had not been used for 12 hours. So the speeding fan could not have been due to the drive bay being overheated.
The fan never slows down.
Even after a restart it immediately spins at its maximum. Plus it stays at maximum speed all the time.
Anyone know what is causing this & how to make it work properly?
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Forum Regular
Join Date: Jul 2005
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I think normally it speeds up when you remove the clear plstic door on the inside...so maybe the sensor that senses the presence of that piece has malfunctioned and it thinks the plastic door or cover is not there. Thats one guess...
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Forum Regular
Join Date: Jan 2001
Location: NYC
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Hi SheerGold. Is this by chance a dual 2.5 PowerMac, from 2005 or so? With liquid cooling?
Machines of that provenence are are now springing coolant leaks in large numbers. Indeed, I have one and am now dealing with that very problem. My problems first manifested with abnormal fan activity. Then the machine would start hanging at reboot, gradually requiring more and more hard restarts before successfully booting. Finally, it stopped booting altogether. I examined the computer and found leaked coolant--when dried, it's a crusty white residue.
If you have a liquid cooled G5, keep a close eye on abnormal symptoms and have a contingency plan. Mine went from abnormal fan activity to death in about a month.
A relevant video.
Also see here.
Good luck!
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Mac Elite
Join Date: Apr 2000
Location: Minneapolis, MN USA
Status:
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Also see here: Apple PowerMac G5 - Coolant Leaks World database
I had Applecare and my G5 2.5 dual was repaired free of charge: but they replaced:
motherboard, processors, liquid cooling unit, power supply, fascia for the cooling unit.
The only original components now are: case, superdrive, hard drive.
Definetely something to be concerned about, it sounds as if that site I posted the link
for is approaching 70 machines reported with this issue so far.
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Clinically Insane
Join Date: Oct 2000
Location: Los Angeles
Status:
Online
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He says it's one of the early models, so I doubt it's a liquid cooled G5.
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Newt 2012-The Republican Revolution Returns!
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Addicted to MacNN
Join Date: Mar 1999
Location: Bellevue, WA
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Something do with the power management? You may need to recalibrate the heat sensor with the fans by using the Hardware Test CD.
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Fresh-Faced Recruit
Join Date: Mar 2008
Status:
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I have a problem like this also, and my current determination is that is it due to the fact that the tower is not receiving proper ventilation.
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