Mac Desktops forum


MacPro suddenly shuts down and starts up again automatically

by lukas_composer / May 9, 2013 7:12 PM PDT

Hello Friends!

Got a really strange problem here, with my Mac Pro.

My Mac Pro suddenly shuts down, and starts up again automatically. No warning, no freezing - just a shut down noise and black screen. After 3-4 seconds, it starts up again.

Can someone help me with that?

All the best,


2010 Mac Pro 2.GHz Quad-Core Intel Xeon
RAM: 16GB Kingston RAM
2x1000GB HDs (one from apple, and another Western Digital)

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All Answers

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Doesn't sound strange at all.
by R. Proffitt Forum moderator / May 9, 2013 11:47 PM PDT

Such machines appear in the shop all the time. The funny thing (at least to the tech) is how many folk say it's not overheating. And then we clean the vents and heatsinks, and maybe replace heatsink compound, a power supply or board or find some corrupt OS.

The constant so far is it's rarely the same thing except that folk don't keep the vents and such clean.


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by lukas_composer / May 10, 2013 5:27 PM PDT

Oh I forgot to mention, that I bought the Mac Pro as a B-Stock item.
And this is were it becomes 'strange': The error appears since I have the machine - and you don't expect dust in a new computer..?

But I got you. I will clean everything, what is in there Happy

How can we be sure, that the problem really is the overheating? Because the computer starts up again 3-4 seconds after the shut down. Thats a really fast - can it cool down again in such a few time?
Sometimes, after the shut down and start up, the computer stays stable for hours/days..

Thank you so much for your help!

All the best,

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B stock? B grade?
by R. Proffitt Forum moderator / May 11, 2013 9:21 AM PDT
In reply to: B-Stock

Sorry but there's a lot of missing story here. I'm going to guess this is some non-Apple refurb machine that was cheap.

If so, time to ask for the money back.

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