PPC G5 CRASHING SOON AFTER STARTUP.

Good suggestion. Here are the readings. I don't know what "normal" is other than that specified for CPU's.

What am I to learn from these readings?

I take it that this app is good for reading but not making any system adjustments?

I can't believe this.

Every step forward turns into a new problem.

After running fine over the weekend, I shut the G5 down and restarted.

Nothing. Push power button and it clicks and flashes on, then immediately clicks and flashes off.

Thinking it might be a fluke, I unplugged power and all connections, then reconnected.

Tried power button again a few times, same thing, click on and immediately off.

Observations?

I think about 45 min. unplugged and cooling.

Just tried it again after a couple of hours. Same results.

Does this sound like power supply?

Do we talk about digital poltergeists on this forum?

Link on PSU voltage wasn't good. I looked up some other threads on PSU testing and replacement.

Sounds like PSU voltage testing is pretty tricky since it appears that conclusive tests need to be done under load. How?

I'm not sure what to do now.

Based on threads I have read this start problem is most likely caused by a failed PSU, BUT could be Video card, CPU's, Motherboard, Switch, etc., etc..

I didn't know I would need to become a certified Apple tech to limp this G5 along. It's like going down a rabbit hole. No idea of where it is going to lead and if I will get to the "end".

What do you advise?

Powermac G5 DP 2.7 has been a good workhorse for a long time. When it's working well, I love it.

I like the stability of 10.4.11 and access to my very useful legacy software and OSX software.

My heart is into keeping it going. My head is calculating how much more life I can squeeze out of it and at what price.

I am off to do homework on replacement parts or a suitable replacement.

If I don't find a good 2.7, which other DP powermacs will accept the RAM and drives from this 2.7?

I may be back with scuba gear to dive deeper into the mysterious depths of the G5.

Thanks to all for your time and effort with my post. Very smart, very helpful!

Thank you for the RAM and HD info.

Have you known a failing Power Supply to cause some of the other problems I have experienced with this G5 before it totally failed?

Since it puts out different voltages for different components I could see how it would throw some thing off. I am trying to think of the most likely and logical thing to replace first.