Spontaneous hard shutdown -- cause?

[William Park]

>>  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?
> 
> Overheating?  Fan failure?
> 
> Could be bad power supply or bad motherboard.

Hmm... I'll check the power supply fan.
-- 
William

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