SGI Octane power issues - SGI

This is a discussion on SGI Octane power issues - SGI ; Hello, I was wondering if anyone out there with an SGI Octane has experienced a similar problem and could offer some insight as to what to do next. When I first got the Octane (a week or so ago) it ...

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Thread: SGI Octane power issues

  1. SGI Octane power issues

    Hello,

    I was wondering if anyone out there with an SGI Octane has experienced
    a similar
    problem and could offer some insight as to what to do next.

    When I first got the Octane (a week or so ago) it powered on and
    functioned fine.
    Suddenly it started turning off on its own (it behaved as if someone
    yanked the
    power cord - no nice shutdown messages in Irix, etc). Now it rarely
    turns on.
    SOMETIMES, (talking like once in 200 times or so) it will power on, but
    rarely
    stays on more than four to five minutes. There does not appear to be
    any
    rhyme or reason as to why it turns on sometimes for a little bit.

    I have tried reseating the system module and power supply. The power
    supply is a
    Cherokee 749 (if I recall correctly) watt unit.

    As far as I understand, this is either a problem with the PSU itself,
    the system board or the frontplane. Any tips from people with similar
    problems or pointers
    on how to isolate the source of the problem?
    Any help is _greatly_ appreciated.


    Lindsey


  2. Re: SGI Octane power issues

    I'm sure somebody here more clued up will be able to help, but it might
    be worth determining if the problem is heat related.

    Once it powers off, does it start up again a while later when maybe it
    has cooled?

    HTH,

    P.


  3. Re: SGI Octane power issues

    In article <1106410343.908492.80730@f14g2000cwb.googlegroups.c om>,
    wrote:
    > Hello,
    >
    > I was wondering if anyone out there with an SGI Octane has experienced
    > a similar
    > problem and could offer some insight as to what to do next.
    >
    > When I first got the Octane (a week or so ago) it powered on and
    > functioned fine.
    > Suddenly it started turning off on its own (it behaved as if someone
    > yanked the
    > power cord - no nice shutdown messages in Irix, etc). Now it rarely
    > turns on.
    > SOMETIMES, (talking like once in 200 times or so) it will power on, but
    > rarely
    > stays on more than four to five minutes. There does not appear to be
    > any
    > rhyme or reason as to why it turns on sometimes for a little bit.
    >


    Although unlikely, try removing the front (plastic) panel. The plastic
    on/off switch has been known to stick and may be stuck and tickling
    the power switch (although I'd expect to see a console message...)

    Joe
    --
    ------------------------------------------------------------------------
    Joseph Michaud - SGI Apps Eng 978-562-8894 x483-8894 jmichaud@sgi.com

  4. Re: SGI Octane power issues

    LindseyWetteland@gmail.com wrote:
    [snip]
    > When I first got the Octane (a week or so ago) it powered on and
    > functioned fine.
    > Suddenly it started turning off on its own (it behaved as if someone
    > yanked the
    > power cord - no nice shutdown messages in Irix, etc). Now it rarely
    > turns on.
    > SOMETIMES, (talking like once in 200 times or so) it will power on, but
    > rarely
    > stays on more than four to five minutes. There does not appear to be
    > any
    > rhyme or reason as to why it turns on sometimes for a little bit.
    >

    [snip]

    Sounds to me like classic symptoms of worn out electrolytic capacitors in
    the power supply. If you have some spare time, and feel confident working
    with a soldering iron, you could try and replace all the electrolytics on
    the high voltage board. They are very cheap, and readily available.

    Tony Mantler has instructions for doing this for an Indigo2.

    http://www.apia.dhs.org/i2ps/

    The concept should be the same for the Octane. You will find the Octane
    power supply is (slightly) easier to dismantle than that of the Indigo2.

    Do remember, though, that there are lethal voltages inside the power
    supply, even when it is switched off. If you don't know what you are
    doing, leave it alone and buy another.

    --
    Dr Tristram J. Scott
    Energy Consultant

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