Hey,
My Power Mac G5 Quad Core shuts down after 10-15 minutes of use without any messages.
What could be the problem?
My Power Mac G5 Quad Core shuts down after 10-15 minutes of use without any messages.
What could be the problem?
Hey,
My Power Mac G5 Quad Core shuts down after 10-15 minutes of use without any messages.
What could be the problem?
Fresh thermal compound might help (and should be done anyway), but I'd also look at possible problems with the LCS given such a huge disparity between the two CPUs.
A couple of good threads here:
Working on the G5 quad liquid cooling system
Quad G5 Liquid Cooling Pump Chugging, nasty thermal disparity between cpu's
I dont quite understand what you want me to do..?
Edit: Is it possible to remove the hot CPU, and use the G5 as a Dual Core?
Yes, it's possible to run with a single processor. But first read through those threads. Sometimes it can be as simple as too much air in the system (hear any sloshing?) or a clogged hose. I've worked on a few for other people, but I've never actually owned one of these. Several here do, so it might be best to wait for more specific advice from them.
For now, so everyone can know what we're talking about, which of these is yours:
Image
The one with the black pumps
No, i dont hear any sloshing, and I've read through them both, and the only opportunity, for a guy like me, would probably be to remove CPU A.
If you have the dual pump LCS then the pump for CPU A could be bad. It could also be clogged.
Can someone please explain to me how to remove the CPU A then?
Assuming the pump isn't bad, it's not all that hard to to unclog the pump and refill the system
Probably not, but I'll need to make the Mac work now. So how do I remove the CPU A?
Can i just remove the powercable from CPUA?
No the motherboard will detect it and throw a stop error.
You need to completely remove the LCS, the processors will come out with it. Then remove CPU A from the LCS and reinstall the LCS.
Hmmm. But wouldn't the single CPU still need to be installed in the top slot (the CPU A location)? This may not actually be a viable solution here since that's where the cooling problem is? Damn. If it were CPU B causing problems, we could just disable it with an open firmware command.
True didn't think about that. Looks like the only way to fix it is to fix the LCS (if thats the problem). I've also seen the G5 CPU's start to overheat like this when they're on their way out.
Aye. Haven't there also been some cases where the temperature diode malfunctions and reports temperatures higher than what are actually occurring? And if it is the CPU itself, and not the cooling system, then the plan could work. CPU A could be removed and then B swapped to the A position.
In most cases these symptoms point to an LCS problem, but that's not 100%. And I don't really have a good sense of what those percentages actually are.
I've PM'd OrangeSVTguy in hopes that he will have time to take a look at this thread and offer some additional troubleshooting steps and viable options. He has done complete overhauls of these cooling systems and has also run them with a single CPU.