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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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My Mac pro 3.1 early 2008does not start

mac pro 3.1 early 2008 eight core do not power on

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You'll need to give us a bit more!

Was it having problems before it stopped? Do you hear or see the fans running?

Did you inspect the onboard diagnostic LED's what are they telling you?

If this is beyond your skills its time to take your system to an independent Mac repair shop who repairs the older MacPro's.

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The most common cause is a failed power supply. This usually manifest incrementally with the machine restarting on its own and the frequency of the restarts increasing till total failure.

Mac Pro First Generation Power Supply Unit Replacement

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grazie sono d'accordo

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Salvo Nicolosi will be eternally grateful.
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