Strange message from Apple Hardware Test / PM G5

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Strange message from Apple Hardware Test / PM G5

I wonder if someone else in here has access to an Apple Hardware Test CD (AHT)...

But first things first:

Two days ago, my mac acted kinda strange. After hitting the power button the spinning wheel beneath the grey apple logo would spin for like an hour or so, until I decided to switch it off. Then, in a sudden, it appeared to work again. So far so good... And then, this morning *blam* nothing... not even a spinning wheel anymore, just the apple logo. So I tried to boot it from my AHT CD, did a hardware test and got the following message in RED:

CPU slewing verification:
Error CPU Model unsupported for this test

Great... no wonder what this means. Holy crap, is my mac going nuts or what? Can somebody shed a bit of light on this topic???

Chris501

PS: The OS works perfectly in another machine, so I assume no software related problem. Just to mention... in case... you know.

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honest question

no sarcasm intended at all. And, Im sure that you have already checked, but are you positive that the AHT cd is the one that came with your machine?

...If it were an older machine, my first suspicion before thinking about severe hardware failure would be the PRAM battery. I guess that it is possible that your PRAM battery is dead, but I wouldnt think that it is likely.

I guess I'd be interested to hear about this as well, from some of our other members who work at apple repair centers perhaps... Biggrin

/Bill

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well, I know for sure that this cd didn't ship with the G5

why? because there was some wrong info in my initial posting. it's not ment to say AHT but it should say ASD - Apple Service Diagnostics, and it is actually version 2.5.8 for PM G5 Early 2005, which is this specific model I own. sorry!

The hardware test (AHT) from the original CD didn't find any problems at all. But as the Service Diagnostics CD tests a bit more sophisticated, I thought this would be the more appropriate testing procedure.

the pram battery is fresh, by the way.

EDIT: ok, now it's screwing it up completely... i successfully booted from my external HDD, and it freezes after a couple of hours. last time it froze after several hours of running the screen saver.
ram, hdd, cd rom and graphics card have been checked by now and are ok...

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update

ok, so i figured out the processor might be the root of the problems. i ordered a new one at apple, swapped it and tried to do the fan calibration...

...well, it stopped right away with yet another error: "UNKNOWN ERROR *VOLT"

so, at the moment it doesn't look that good for me. next thing i'm going to swap will be logic board. let's see what happens.

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update - the second

so, news from the g5 front: i've swapped logic board, processor, graphics card & ram modules so far. already tried a naked system without drives. and still the same issues.

the fan calibration now gives some more characters to read, now it says: "UNKNOWN ERROR *VOLTMETER CALIBRATION"

ok, so far it's already able to tell me full words not just the first characters. a progress, even if it's a small one. today i also tried to swap the power supply, still the same message...

i'm completely out of guess what the problem with this sh*** g5 could be... i'd love to smash it at the next wall, if it wouldn't be my boss' machine. }8(

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hmm..

well.. the only thing left to swap out i guess would be the power supply.

maybe its providing unstable voltage?

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actually i already swapped it...

...see the post above. if i wouldn't have already swapped it, i would bet on the psu, but the swap didn't solve the problem. any suggestions highly appreciated !!!!

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