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i Mac question

Facetious

Facetious

Moderated
Just recently, my OS - X G5 has been shutting off and restarting back up by herself some 5 - 10 mins. later.
A little research led me to remove the back panel and check for proper fan operation. Apparently the unit shuts down when the processor temp surpasses something like 170 degree ƒ.

Bingo ! The larger of the two fans is motionless. I delicately, by hand, rotate the circular fan to verify that it hasn't ceased - confirm - it spins freely. I then, with grounded wrist strap attached, unplug the tiny black fan wire harness and immediately reconnect it as original in the hopes that it may re energize. I power back up the unit but, the larger fan will only run at the highest speed no matter how many files are open.
Is there something in the Utilities file Activity Monitor where I can recalibrate the fan to automatic control ?

Thanks ! :o
 
Namreg

Namreg

Banned
macs suck... 4.5 years of old graphics and no possible future upgrades is more like it... and i run XP (recently switched to vista) and have never had an issue i could fix myself...

ok, so now that i'm done i'll climb down from my high horse...

pretty much all fans in a modern PS are temp controlled (except for some case fans, but even these can be controlled if they are plugged in to the mobo or some sort of controller). the speed of the fan is controlled by applying varying amounts of voltage to the fanmotor. it is possible that the motor gave up, or that the motherboard/fan speed sensor have been damaged somehow which renders them unable to read speeds or temperatures, and thus the motherboard applies full voltage to the fan as a precaution.

more likely is that when you unplugged the fan your computer only detected one of the fans (the one still plugged in) and compensated for this by running the remaining fan at full juice. some boards won't even start up unless a fan is plugged in somewhere, so this is likely. try switching your system off completely (pull out th eplug and wait 2 minutes), and then turn it back on and see what that does.

also, go into the BIOS (no idea of how to do that on a mac), if it's anything like a normal BIOS there should be 'PC health' or similar section. that should let you adjust fan thresholds, or at least let you see which fans are turning at which speed.

that's all for now, i must ask my friend google for more advice.
 
Facetious

Facetious

Moderated
Personally, I don't get all that consumed in the fanfare :dunno:

It's nice to have options ! How about that one ? :D

I just love how these things adjust themselves from time to time. :hammer:
.........................................................................................:rolleyes:


Provided Information Considered,
& Thanks ~
 
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