Fans stay loud 100% after initial 'gong' and bootup

I hope someone will have a suggestion here or can help.
A perfectly fine 2008-model Mac Pro (3.2Ghz, 32GB RAM, nvidia GT card) was shipped (in original packaging!) across country. While seemingly in perfect shape, when turning on, the fans roar up (as they do, full force, at initial switch-on), but then STAY ON full force, constant, even after the 'gong' and into boot-up.
Again, this same machine, no changes done, slowed them down to a whisper after 'gong' just before shipping.
Nothing obvious is loose inside.
Short of going to the Apple store with it - does anyone have had a similar experience or has any suggestions as to what to try?
Thanks,
Dan

Hatter,
thanks.
I re-installed the system from scratch just prior to shipping (and nothing else was installed). Also, the system was shipped in Apple' packaging, so frankly I didn't see a need to remove any internal components - though in hindsight, that might have helped.
All components (incl. RAM, GPU) were working fine and tested fine; never had a problem until the shipping - and from what we can tell, it's working - just the fans are at 100% and at all quiting down from the moment of startup.
We'll try the SMC reset, and I guess nvram and pram will be next, prior to us trying the Apple store...
Thx,
Dan

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Message was edited by: Danny Chapman

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[2014-09-28 00:01] [PACMAN] synchronizing package lists
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[2014-09-28 00:03] [PACMAN] upgraded bash (4.3.024-1 -> 4.3.026-1)
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[2014-09-28 00:03] [PACMAN] upgraded nss (3.17-3 -> 3.17.1-1)
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[2014-09-28 00:03] [PACMAN] upgraded gstreamer (1.4.2-1 -> 1.4.3-1)
[2014-09-28 00:03] [PACMAN] upgraded gst-plugins-base-libs (1.4.2-1 -> 1.4.3-1)
[2014-09-28 00:03] [PACMAN] upgraded gst-plugins-bad (1.4.2-1 -> 1.4.3-1)
[2014-09-28 00:03] [PACMAN] upgraded gst-plugins-base (1.4.2-1 -> 1.4.3-1)
[2014-09-28 00:03] [PACMAN] upgraded gst-plugins-good (1.4.2-1 -> 1.4.3-1)
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[2014-09-28 00:03] [PACMAN] upgraded libreoffice-fresh-he (4.3.1-1 -> 4.3.2-1)
[2014-09-28 00:03] [PACMAN] upgraded qtwebkit (2.3.3-2 -> 2.3.4-1)
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[2014-09-28 00:06] [PACMAN] installed obexfs (0.12-4)
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