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My computer keeps on turning off

by vlad123456789012345 / July 6, 2013 6:48 AM PDT

About a month ago my computer started randomly turning off and it would say power surges detected and then I have to login again. Then I went to get it fixed and they put a neew power supply in and again the problem happens except not as frequently?
Does anyone know what the cause might be
is there to much elecricity from the outlet? Is the computer or wires too old? Is it sensitive to weather

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by vlad123456789012345 / July 6, 2013 6:49 AM PDT

it happens more frequently now

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Tell us,
by Dafydd Forum moderator / July 6, 2013 7:08 AM PDT
In reply to: correction

About your cleaning regime. Some details such as OS would help.


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by Eternal2 / July 6, 2013 7:09 AM PDT
In reply to: correction

Try doing a factory restore on that. Could be a problem with the OS

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Not all that uncommon and often attributable to excess
by VAPCMD / July 6, 2013 7:19 AM PDT
In reply to: correction

heat at the CPU itself.

Sometimes it's as simple removing the dust bunnies that block the CPU heatsink fan.

If its an older PC...sometimes its capacitors that fail when they dome, bulge or leak....that's worth checking too when you open the PC.


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I still say it's heat.
by Dafydd Forum moderator / July 7, 2013 2:54 AM PDT

Given no details as to age OS etc, I have to go with heat.


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(NT) Google Bad Caps for that.
by Dafydd Forum moderator / July 7, 2013 3:13 AM PDT
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Do you have a good surge protector?
by wpgwpg / July 6, 2013 7:16 AM PDT

If you don't have a good surge protector, you really should. Since you say it's weather sensitive, it sounds like it might be happening during thunderstorms. These can cause power fluctuations which are really damaging to electronic equipment.

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Like wpgwpg I didn't see...
by Edward ODaniel / July 7, 2013 5:27 AM PDT

anything about the surge protector you are using. If you aren't you should be as power surges are a daily fact of life and while the power supply can deal with minor surges that capability decreases as the computer ages.

If you are using a surge protector what kind and how old is it? If it is a MOV ( Metal oxide varistor) based suppressor it likely needs replacement. MOVs have a lifetime "joule" rating. The joule is an engineering term for energy (energy can be measured in joules). The joule rating for an MOV means that when a particular MOV has received the specified amount of energy, it no longer works! This could be the result of one or two large surges or several small surges. It doesn't matter how much you paid for it when it has been hit by enough surges it is done for. Surge protectors using MOV are shunt mode suppressors as they shift the surge to ground.

Best bet for a surge protector is a series mode suppressor which affords lifetime protection as it doesn't sacrifice any components to a [power surge, instead it blocks them. They are considerably larger and MUCH heavier suppressors and also tend to be more expensive. UPS (Uninterupted Power Supplies) tend to use this type of suppression giving you that benefit plus power for a proper shutdown in event of power loss and should always be considered for computers. Their disadvantage is that the batteries usually only last two or three years before you have to replace them with new ones but it is worth it - especially when problems such as you describe never seem to happen with a good UPS.

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