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Power Mac G5 :: System Will Not Boot Properly And Loud Fans


My husband's Power Mac G5 won't boot properly -- it hangs on the grey Apple screen, after which the fans in the unit come on really loudly, and the unit eventually shuts itself off. We've cleaned out the unit, all the vents, and checked the fans -- they seem to be working properly. Opening the case while the computer is on shuts one of the fans off, but the others are still really loud. We took it to a Mac store, which diagnosed a hard drive issue and suggested data recovery and an installation of a new hard drive for $500.

We are really broke at the moment and cannot afford something like this. So we've bought a new hard drive and are going to see if that solves any issues. When we got the machine back from the store, I booted the machine from the install disk (holding down "C" while the machine booted), and got a boot from the hard drive instead. No "install" screen showed up. Tried a re-start while holding down "C" and the same thing happened. I tried to run disk utility from the install disk, but the "repair disk" option was greyed out.

I ran "repair disk permissions" anyway, and tried to restart in safe mode, which resulted in a panic kernel message. Tried it again, with the same results. I was trying to write down the full panic kernel message, but it shut itself off in the midst of my writing. Meanwhile, I've been reading on the forums that this issue could be caused by:
faulty logic board;
old battery that needs to be replaced;
failing thermal paste.

Information:
Power Mac G5
Mac OS X (10.4.11)


View 16 Replies (Posted: Jan 27, 2011)

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MacBook :: Hard Drive Fans Loud When Watching Movie
I notice that while streaming a movie, watching a dvd or playing a game my hard drive fan is so loud, its annoying. I have a 2008 White Macbook and i replaced the stock hard drive with a western digital 5400rpm 320gb and I only have 1gig of ram. I have no problem replacing the hard drive for a 7200 but i just need to know if its worth it. If i were to upgrade the ram to 2gigs would that solve the problem? Is it possible to install a 500gig drive into the white macbooks?

Posted: May 9, 2009

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MacBook Pro :: Very Loud Whirring Noise Coming From The 13.3 Fans
It started off as a wierd whirring noise. slosly got louder. now the macbook actually vibrates to it.

Info:
MacBook Pro, iOS 5.0.1

Posted: Mar 8, 2012

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Power Mac G5 :: External Hard Drive - System Won't Boot
I recently purchased a Western Digital 750 gb hard drive. I reformatted it to Mac Journaled and it is connected through firewire 400. It works great and all, but I've noticed that it has significantly slowed my system startup time when I press the power button (recently, it won't start at all). After I unplug the firewire cord and press the power button, it starts normally. I'd rather not have to unplug my hard drive every time I turn my computer off.

Information:
Dual 2.5 G5
Mac OS X (10.4.8)
Leopard 5.2

Posted: Apr 12, 2008

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MacBook Pro :: 13 Inch Early 2010 Gets Really Hot And Fans Get Really Loud?
I have an early 2010 MBP (13 inch) whose RAM I upgraded to 8GB and the hard drive I upgraded to 750GB.Ever since I installed OSX Lion it takes ages to boot up (far slower than Snow Leopard which booted up almost instantly from turn on).Furthermore, when running, it gets very hot when running Windows virtualisation software inside OSX (VMWare Fusion 4/Parallels Desktop 6/7 - same results) and the fans turn on and become noticeabley loud.The machine is still under Applecare Warranty, is there anything I can do myself to resolve this, especially the heat/noisy fans?Is it due to having to work harder to virtualise Windows inside OSX and so run both systems concurrently, thus requiring more resources?  

Info:
MacBook Pro, Mac OS X (10.7.4)

Posted: May 24, 2012

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