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<blockquote data-quote="pigoo3" data-source="post: 1885158" data-attributes="member: 56379">The Mac Pro shouldn't randomly shut off like that.&nbsp; One possibility with an older computer like this (especially on a Mac Pro)...the power supply could be very weak/failing.&nbsp; It's possible the power supply has enough &quot;power&quot; to turn the computer on...but as soon as additional power is needed for the video card &amp; logic board to fully function...this is too much and it shuts off.It is possible to test this theory further by removing all unnecessary items (extra RAM, extra drives, just one low power video card, remove any additional PCI slot cards)...basically run the computer with the absolute minimum hardware configuration.&nbsp; No guarantee this will work...but could be a troubleshooting step to try.Also (just in case)...replace the PRAM battery on the logic board (coin sized CR 2032 battery).HTH,Nick</blockquote>

[QUOTE="pigoo3, post: 1885158, member: 56379"] The Mac Pro shouldn't randomly shut off like that. One possibility with an older computer like this (especially on a Mac Pro)...the power supply could be very weak/failing. It's possible the power supply has enough "power" to turn the computer on...but as soon as additional power is needed for the video card & logic board to fully function...this is too much and it shuts off. It is possible to test this theory further by removing all unnecessary items (extra RAM, extra drives, just one low power video card, remove any additional PCI slot cards)...basically run the computer with the absolute minimum hardware configuration. No guarantee this will work...but could be a troubleshooting step to try. Also (just in case)...replace the PRAM battery on the logic board (coin sized CR 2032 battery). HTH, Nick [/QUOTE]

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