[olug] Machine randomly powers off

[Jay Bendon]

Pop the case open, and feel/look at all the capacitors on the mobo.  if
brown stuff is coming out or the top is popped they're blown and the mobo
needs replaced.

--Jay

On Tue, Oct 18, 2016 at 8:43 PM, Ben Hollingsworth <obiwan at jedi.com> wrote:

> Well, the power supply was NOT the problem.  The box had powered off again
> when I got home from work tonight.  I bypassed the UPS and plugged the box
> straight into the wall, so we'll see how that works out.  I've got a number
> of other low-current things plugged into that UPS, and none of them has
> ever shown any problems.  Maybe it's just a bad outlet.  We'll see.
>
>
> On October 17, 2016 11:39:06 PM CDT, Ben Hollingsworth <obiwan at jedi.com>
> wrote:
> >There are no spare drives.  All 6 are necessary for the system to
> >function (RAID5).
> >
> >After the box powered off twice today, I followed the numerous
> >suggestions and swapped out my older, larger Seasonic PS for a (barely)
> >newer, smaller Coolmaster that I had on hand.  Due to the random nature
> >if these shutdowns, it'll be the better part of a week before I know
> >for sure if it's really helping.
> >
> >Thanks for all the suggestions.
> >
> >
> >On October 17, 2016 8:09:17 PM CDT, Kevin <sharpestmarble at gmail.com>
> >wrote:
> >>Swap out the PS, see if it runs well with it swapped. You could also
> >>try
> >>disconnecting the (spare?) drives and see if it runs fine with just
> >one
> >>drive, possibly booted off a USB thumbdrive or other non-SATA/IDE/etc
> >>drive
> >>
> >>On Mon, Oct 17, 2016 at 6:44 PM, Jay Bendon <jaybocc2 at gmail.com>
> >wrote:
> >>
> >>> 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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> >--
> >Ben "Obi-Wan" Hollingsworth
> >obiwan at jedi.com, http://www.jedi.com
>
> --
> Ben "Obi-Wan" Hollingsworth
> obiwan at jedi.com, http://www.jedi.com
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