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Apple Desktops Discussion of Apple's desktop machines including Mac Pro, iMac, Power Mac, and mini

Power Mac - replacing a G5 processor


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kato_b

 
Member Since: Mar 18, 2009
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Mac Specs: G5 2Ghz dual processors

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Hi, My G5 has a broken processor and I was wondering how easy it is to fit a new one?

I've been looking on the net for instructions but all the articles seem to be about upgrades rather just replacement.

I obviously don't want to break my Mac further by doing DIY on it, but have been quote a lot to fix it and have had a total nightmare finding an apple service provider who knows what there doing.

Thanks for reading!
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scathe

 
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well if you get the right processor then it shouldn't be a problem to pop it in instead of the broken one (btw how is it probken?)

but, I have only done this on a pc desktop and I don't have experience with G5 hardware, but still, it shouldn't be a problem
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pigoo3

 
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Mac Specs: 13" MB 2.4ghz, 2gig ram, OS 10.7.5

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Quote:
Originally Posted by kato_b View Post
Hi, My G5 has a broken processor and I was wondering how easy it is to fit a new one?

I've been looking on the net for instructions but all the articles seem to be about upgrades rather just replacement.

I obviously don't want to break my Mac further by doing DIY on it, but have been quote a lot to fix it and have had a total nightmare finding an apple service provider who knows what there doing.

Thanks for reading!
I think that your biggest issue is getting a replacement G5 processor (availability & correct processor speed). These are not that commonly available...but occasionally you can find them on E-Bay.

- Nick
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kato_b

 
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Mac Specs: G5 2Ghz dual processors

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I have just been told that the processor is broken by apple people. When I turn it on, the screen doesn't go past the apple symbol and the fans go on full blast.

I have had a nightmare trying to get it fixed with Apple service providers (3 attempts now) who have provided really bad service and broken my computer further (by dropping it). So I've found the part on ebay for 100 and am trying to work out if I want to risk fixing it myself!

I've been told that another issue with the computer might be the reason the processor broke (by friends who make their own PC's etc). But i'm hoping the processor has just died and I can hopefully replace it myself....

...is that being a bit hopeful?
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louishen

 
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I could be wrong, but I wouldn't think the mac would even get as far as the apple logo, if the processor was busted.

Firstly try starting up in safe mode
Mac OS X: Starting up in Safe Mode

Failing that, try booting off your original Apple OS disks by holding down the C key on start up

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ADKhikerVW

 
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Yeah, you wouldn't even see anything on the screen if it was the processor. The system would just refuse to start. You would get no startup chime, no gray screen, and no Apple logo. It has to be something else besides the processor.

If you are actually seeing the Apple logo and the spinning progress indicator, but the system does not boot, it may simply be a problem with your installation of OS X. Have you tried booting from the original install disks that came with the computer? If you can, boot from them and try repairing your disk from Disk Utility and then repair permissions. If you need help doing this let me know. Try to boot from your hard drive again. If it still doesn't work, there might be bigger problems which require a complete reinstallation of the OS.

I just don't think this is a hardware problem, since it does try to boot. It seems much more likely that it is a software issue. It most certainly is NOT the processor though.
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harryb2448

 
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Another who does not think the processor is dead as you are getting some of the boot up process.

Have you tried zapping the pram? Immediately after the chime sounds hold down at the same time the Option, Command, P and R keys. Keep held down until after the thirds chime. If no joy go for the reboot from the install DVD, run Repair Disk, and if all is well try for an archive and install.
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BenL

 
Member Since: Jul 25, 2009
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If you have a dual-processor machine and the second processor is the problem then your machine will hang at the Apple logo. If the first processor is the problem then it will probably not even chime on power-up.

If this is indeed your problem you can try to disable the second processor.

Boot into Open Firmware by holding down Cmd-Opt-O-F
At the prompt "0 >" type
setenv boot-args cpus=1

You should get an OK back.

Type
mac-boot

To get back to the default nvram settings, at the open firmware prompt type
reset-nvram
or reboot with Cmd-Opt-P-R to reset nvram
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