[olug] Machine randomly powers off

[Jay Bendon]

check the motherboard for blown caps, test with known good psu.  It is most
likely one of the two.  IF you have a good UPS it should prevent most power
sags and swells so its probably not external power causing the issue.  I
assume also its not a thermal shutdown since you said fanspeeds (and
temps?) are all ok.

--Jay

On Mon, Oct 17, 2016 at 2:11 PM, Chad Homan <choman at gmail.com> wrote:

> I had a similar issue, but it turned out to be a dimm chip going, does it
> hurt to run memtest just saying
>
> On Oct 17, 2016 3:45 PM, "Jason Troy" <jason.troy at gmail.com> wrote:
>
> > +1 to the power supply. That's been my cause on several occasions. I
> don't
> > even try the other steps anymore.
> > You might also inspect Mobo for any bulged caps while you are in there.
> >
> > On Oct 17, 2016 11:50 AM, "Justin Reiners" <justin at hotlinesinc.com>
> wrote:
> > >
> > > Fwiw I'd replace the power supply, they are cheap.
> > >
> > > On Oct 17, 2016 11:42 AM, "Ben Hollingsworth" <obiwan at jedi.com> wrote:
> > >
> > > > Hey all,
> > > >
> > > > I'm seeing some weird problems with my desktop box (Ubuntu 16.04),
> and
> > I'm
> > > > not sure what to look for next.  It just randomly (as far as I can
> > tell)
> > > > powers off every so often.  It might stay up for a few days, or it
> > might
> > > > say up for a few minutes.  I've witnessed it a couple times when I'm
> > using
> > > > the console, but it usually happens when it's sitting idle.  It
> always
> > > > powers on & boots just fine when I press the power button.
> > > >
> > > > There's no mention of anything in the OS logs.  The machine just dies
> > cold.
> > > >
> > > > MRTG graphs show nothing unusual related to heat, fan speeds, or
> > > > voltages.  A visual inspection shows all fans spinning.
> > > >
> > > > The UPS (which is plenty big & has a new-ish battery) doesn't hint of
> > any
> > > > problems.  The BIOS is set to power back on if it shuts down due to a
> > power
> > > > loss, but that doesn't happen, so I don't think it's related to
> > external
> > > > power.  I'm running a Seasonic 700W PS that's been working great for
> > > > years.  I do still have my old desktop box from which I could swap
> the
> > > > (smaller) PS, but I haven't tried that yet.
> > > >
> > > > It has 4 sticks of RAM (2x4GB, 2x8GB), and I've swapped them out in
> all
> > > > combinations, and swapped slots.  Memtest runs for hours with no
> > errors, so
> > > > I don't think it's RAM-related.
> > > >
> > > > I also still have the mobo/CPU/RAM from my old desktop box (which is
> > > > significantly slower), but those aren't individually interchangeable
> > with
> > > > the new system.  Swapping all 6 of my hard drives between systems is
> > time
> > > > consuming, so I'd like to diagnose further before doing that.
> > > >
> > > > Before I go randomly replacing expensive or time consuming parts,
> where
> > > > else should I be looking for the cause?  This is *really* annoying!
> > > >
> > > > --
> > > > *Ben "Obi-Wan" Hollingsworth* obiwan at jedi.com <mailto:
> obiwan at jedi.com>
> > > > www.Jedi.com <http://www.jedi.com>
> > > > The stuff of earth competes for the allegiance I owe only to the
> > > > Giver of all good things, so if I stand, let me stand on the
> > > > promise that You will pull me through. /-- Rich Mullins/
> > > >
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