MP 1,1-5,1 Mac Pro 5,1 powers ON for a second, but quickly shuts off.

[tsialex]

So I left it plugged out for a few days, given that I noticed the longer I left it out the longer it would stay on, my bet was it might stay on long enough to run ASD.

So today I ran Apple Service Diagnostics 3S149 and it passed everything! And what's even weirder is it is working fine and it hasn't shut down since. I did some basic maintenance and reset the pram 10 times in a row. And sleep and wake has magically fixed itself (it used to crash when waking from sleep). Northbridge chip is currently 63c and hasn't been above 70c so far. Curiouser and curiouser. Fingers crossed.

Crashing/KPs on wake-up from sleep is usually RTC related. First step of any diagnostic is to check the RTC BR2032 battery voltage, replace it anytime it's below 3,00V. Crashing when waking up is a known cause of BootROM corruption. Never force use a Mac that is crashing when waking up, it will become a brick overtime.

Btw, never use a CR2032 as a replacement for a BR2032 battery unless is not possible to find the later where you live, it's not the correct chemistry for the temperatures below/around the GPU and it will die in months.

 

[simacc]

I did check the battery actually...it seemed fine...it worked fine in my metronome which is fussy with those style batteries, I was a bit lazy and didn't check it with a meter though, should have done that...I was going to replace it with a CR that I had, but seems it worked I just put the original BR back in...I'll go buy a new BR one.

I just stopped using sleep on it a while ago once that happened, and that was when I checked the battery out...thanks for the tip I'll keep that in mind.

It's back working perfectly all day...I can't believe TBH.

 

[tripmusic]

So I left it plugged out for a few days, given that I noticed the longer I left it out the longer it would stay on, my bet was it might stay on long enough to run ASD.

So today I ran Apple Service Diagnostics 3S149 and it passed everything! And what's even weirder is it is working fine and it hasn't shut down since. I did some basic maintenance and reset the pram 10 times in a row. And sleep and wake has magically fixed itself (it used to crash when waking from sleep). Northbridge chip is currently 63c and hasn't been above 70c so far. Curiouser and curiouser. Fingers crossed.

That's great your motherboard showed no errors. I'm guessing something like PSU capacitors on their way out are not going to come up in diagnostics, so there's always that possibility. Hopefully not though. That's also great that your Northbridge is where it's supposed to be, but if you ever take the CPU heatsink off for anything, I'd unscrew the CPU tray board and just have a look at the plastic retainer ends underneath.

Sometimes that PRAM reset can do wonders (I never tried 10 times though? Hehe). Good luck the rest of the way!

 

[35Mosessupposes]

I did check the battery actually...it seemed fine...it worked fine in my metronome which is fussy with those style batteries, I was a bit lazy and didn't check it with a meter though, should have done that...I was going to replace it with a CR that I had, but seems it worked I just put the original BR back in...I'll go buy a new BR one.

I just stopped using sleep on it a while ago once that happened, and that was when I checked the battery out...thanks for the tip I'll keep that in mind.

It's back working perfectly all day...I can't believe TBH.

Is this computer still working? Did you ever have to replace the motherboard/backplane? I have a 2009 macpro with same issue.. will click on for a sec & fail to fully power up.. I just got it out of storage and has not been used in a few years. was powering up fine As soon as I took it out of storage but stopped After a of couple weeks of use.

 

[35Mosessupposes]

Ok. Yes, I have the same machine as you, though you got your CPU model or speed confused? Doesn't matter.

Apple Service Diagnostics 3S149 is what you want for the Mac Pro 2010

I don't see the instructions on that site, so I'll upload them. You don't need anything fancy to get it on USB, just follow the instructions carefully. When you boot up, hold the option key. There will be 2 versions, EFI and ASD. Boot into the ASD as it's more robust. I would just check all the test boxes, BUT make sure you have the test resume once an error is detected, otherwise it won't run through all the tests. There should be a checkbox for that. That's it. You can save the test results. I would do that. Oh, your fans will be spinning insanely during the fans test, so don't worry.

Do you know which one I need to use for a hardware test for my 2009 Mac Pro?

I’ve actually got the computer turned on. Do I have to put the diagnostics program on a usb drive to get the diagnosis test to work?

 

[tsialex]

AHT/ASD:​

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You need an Apple OEM GPU (HD 2600XT, 8800GT, Quadro FX 5600, GT120, HD 4870/5770/5870) to run AHT/ASD. AHT/ASD can be used with PC flashed GPUs, but will fail mid test with a sensor error when the GPU sensors are tested. Non flashed PC GPUs won't work at all. You need to boot completely vanilla, no OC, to use AHT/ASD.​

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You can get AHT links and instructions on how to install it on this GitHub article.​

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AHT, you need 022-4831-A.dmg:​

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GitHub - upekkha/AppleHardwareTest: Apple Hardware Test Download Links

Apple Hardware Test Download Links. Contribute to upekkha/AppleHardwareTest development by creating an account on GitHub.

github.com

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The ASD version that you need is 3S149. The AHT instructions are valid for creating an ASD USB key and Apple provides an installation PDF with it.​

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ASD, you need 3S149:​

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Information Architect Blog

As an information architect, these are a few tools, articles, and miscellanea that I find useful.

www.loremipsum.info

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For people that have an early-2009 cross-flashed with MP5,1 firmware, you will need to run the MacPro5,1 versions of AHT (022-4831-A) and ASD (3S149).​

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