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The Mac Pro First Generation is an Intel Xeon-based workstation computer manufactured by Apple Inc. The first generation model includes the machines from 2006 through 2008.

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Mac Pro 2009 won't start up - solved

Hey, everyone.

I got a problem that my mac pro 2009 doesn't start up.

Yesterday, I use it but it shutdown suddenly.

Then I press the start button again and it boot about 15 sec then shutdown.

After this, I can't start up anymore when I press the start button.

I try to check anything following this

When I plug the power cord, the OVTMP CPUA and OVTMP CPUB LEDs flash red.

Press the DIAG button, the 5V STBY LED illuminates

Disconnect the front panel board and momentarily jump the SYS_PWR, no any response.

Reduce computer to minimal configuration, 5V STBY LED illuminates.

But I still don't know which part broken.

Can anyone help me or tell me which part I can check?

Whether the OVTMP CPU A, B LEDs, and 5V STBY LED illuminating means the power supply and backplane board is ok?

Thanks a lot.

Answer this question I have this problem too

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Did you solve this problem? I'm having the exact same problem!


yes!! I solved my problem. Finally, I can sure that my backplane board is out of work , so I replaced it ,and my mac work again.


Thanks! I'll try to do the same!


Hi, I am facing the same problem now. May I know what is backplane board? Is it the logic board?


Yes, it's the logic board.


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1 Answer

Since it looks to be mainly an electrical issue I'd suggest to see if you can manage to find a "tested-good" PSU to use with your mac pro. I recently had a similar issue and it helped I had access to 2 identical mac pros (both 2,1) to try and isolate the problem (sudden shut down after few min of use). Sadly in my case the culprit seems to be something on the motherboard, in which case isn't worth to try and figure out what as that would require time, knowledge and equipment (electronic diagnostic lab) that I do no posses or have access to.

Hope the above might help you point you in the right direction and best of luck with finding and solving the issue with your mac pro! :)

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Hong Wei Li will be eternally grateful.
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