Spontaneous hard shutdown -- cause?

[James Knott]

William Park wrote:
> Hi All,
>
> For few days now, I'm having spontaneous shutdown.  Not a reboot,
> but just sudden power down with no log to tell what happened.
> No problem with hydro.  Just before the shutdown, I hear some
> relay being triggered in the power supply.  It's the same sound
> you'd normally hear in the normal shutdown.
>
> So, I'm thinking bad motherboard.  Has anyone encountered this
> kind of symptom before?
>
>
Actually, anything that causes a power fault can do this.  Without some 
testing, it's impossible to say.
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