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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Does not turn ON

My Mac Pro 12-Core Mid 2012 turned off and never turned on again.

Tried to reset SMC, changed battery and nothing.

When plug the AC cord, two red lights flash.

When push the diagnosis button only turn on the Led Called +5V

Serial #: C07J80A5F4MD

If anyone can help me, i dont know what else shoud i do.

Thanks a lot


Anyone please help me

Answer this question I have this problem too

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Can you give us some of the backstory here. Like what happened just before the system died.


i was doing a video conversion using DaVinci Resolve...


Same symptoms here. Was installing an update and it hung halfway through so I restarted. It doesn't respond. No response from power button, no fan noises, nothing.


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1 Answer

1. Disconnect all accessories that are plugged in to your computer. This includes things like printers, USB hubs, or mobile devices.

2. Hold down the power button for ten seconds. Then, press the power button again to see if the computer turns on. if not move to step 3.

3. Reset your SMC.

If you finish all these steps and still cannot start the computer you may want to check cords (adapters) for power. It is also possible that the power switch is bad. If that not it then I would guess that your Power supply unit inside the mac is bad, but that is assuming you have NO lights or fans running when pressing the power button. If you do have lights and a fan try a different monitor or unplug your current monitor hold the power button for 5 seconds then plug it back in and see if you are getting a picture. If not then see a professional.

Hope this helps:)

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