[X4U] How much can it cost

[Paul Moortgat]

Resetting the PMU did nothing.  Do a o-c-p-r at startup doesn't work.   
I just get 1 boing at startup and then a 50-50 black screen or grey  
with the Apple logo.  But no further.

Paul Moortgat

On 31 May 2008, at 05:57, Ronald Steinke wrote:

> On 30 May, 2008, at 6:29 AM, Paul Moortgat wrote:
>
>> My G5/2.5 suddenly turned into a vacuum cleaner yesterday evening  
>> and got frozen.  I restarted and all worked well.
>> This morning I woke the G5 and had a black screen, and when I  
>> restarted I got a black screen again.
>> Then I restarted with opt-comm-shift-del to use my external backup  
>> wich worked.  Then I could insert my DW disk and restarted holding  
>> the "C".
>> I repaired my internal disk, restarted and then did the latest  
>> upgrade to 10.5.3.  All seemed to work.  After 10 minutes I got  
>> that vacuum cleaner sound again.
>> After that I no longer can use the internal HD, nor the external.
>
> Not desiring to throw a full bucket of ice water on your  
> unsuspecting shoulders, but......
>
> A local tech has suddenly found himself with a number of G5 liquid- 
> cooled towers in the shop for diagnosis and repair. The first had to  
> be taken down to the processors to find that an o-ring had failed  
> and leaked the coolant onto the processor chip and killed it.
>
> The second arrived about a week and a half later and was found to  
> have the same problem, just on the other processor. One leaked on  
> the left side, this one leaked on the right side.
>
> Yesterday, a third tower arrived showing the same beginning  
> symptoms: ie: high speed fan operation continuous from startup. It,  
> too, has a leaking o-ring and has killed its processor too. Each of  
> the owners reported that the fans had come on at high speed about  
> two or three days before their tower stopped working completely. All  
> of these are the 2.7GHz dual processor models.
>
> Now, I am beginning to worry about my G5 Dual 2.0GHz Processor  
> tower. It is almost out of warranty and I didn't buy the extended  
> coverage from day one. I don't have any high speed fan noise yet,  
> but I am listening very carefully while sitting here at the desk.
>
> I have pulled this model tower apart to upgrade parts, and never saw  
> any indication of o-ring leakage until the tech showed me what he  
> had found of the deceased machines. If you are having high speed fan  
> operation, you should check out the o-ring seals on the processor  
> chips for possible leaks before you run your tower much longer.
>
> Just what I have learned from my local tech. Hope it doesn't cause  
> too much worry, but gives you a chance to head off any major repair  
> costs.
>
> Ron
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