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#835330 - 5th Nov 2013 5:39pm PC turning on and off repeatedly
mikeeb Offline

Wise One

Registered: 8th Oct 2013
Posts: 795
Loc: birkenhead
Last night my PC was constantly turning on and off every few seconds.
Done a search and points to maybe a PSU prob but it could be anything
http://pcsupport.about.com/od/findbysymptom/ht/pconthenoff.htm
I was going to try the PSU from my old PC but it was an old one (prob AT from searching google)
Because old PSU would not fit I reconnected the original one back up and all is now working fine
Very strange as I did not change anything
I will leave it whilst it is still working but any ideas why this may happen?

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#835354 - 5th Nov 2013 8:30pm Re: PC turning on and off repeatedly [Re: mikeeb]
YinYang Offline
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Registered: 26th Jul 2013
Posts: 696
Loc: Hell Knows
Computer virus, perhaps?

Either that or your computer is haunted! ghost laugh

http://paranormalis.com/threads/haunted-computer.5564/

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#835375 - 5th Nov 2013 10:07pm Re: PC turning on and off repeatedly [Re: mikeeb]
Mark Offline


Wiki Master

Registered: 9th Nov 2003
Posts: 21086
Loc: Wirral
Its overheating.
The heat sink may have come loose.
If you keep trying it you could cause permanent damage. Open it up and check.
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#835401 - 6th Nov 2013 10:06am Re: PC turning on and off repeatedly [Re: mikeeb]
mikeeb Offline

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Registered: 8th Oct 2013
Posts: 795
Loc: birkenhead
lol YingYang, it aint that
Hi Mark
Do you mean if I ignore it and just keep booting up without checking?

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#835423 - 6th Nov 2013 1:09pm Re: PC turning on and off repeatedly [Re: mikeeb]
DeanoBirko Offline
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Registered: 12th Oct 2011
Posts: 783
Loc: Birkenhead
Open it up and see if the heat sink is loose on the motherboard, as Mark said. If you dont know what to look for, you could try a computer shop.

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#835429 - 6th Nov 2013 2:18pm Re: PC turning on and off repeatedly [Re: mikeeb]
mikeeb Offline

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Registered: 8th Oct 2013
Posts: 795
Loc: birkenhead
The heatsink is solid
The pc is only a year old

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#835431 - 6th Nov 2013 2:34pm Re: PC turning on and off repeatedly [Re: mikeeb]
Mark Offline


Wiki Master

Registered: 9th Nov 2003
Posts: 21086
Loc: Wirral
If its working ok now. then it could have been a loose connection.

You Pc Vibrates and anything is possible.
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#835432 - 6th Nov 2013 2:40pm Re: PC turning on and off repeatedly [Re: mikeeb]
Mark Offline


Wiki Master

Registered: 9th Nov 2003
Posts: 21086
Loc: Wirral
Originally Posted By: mikeeb
lol YingYang, it aint that
Hi Mark
Do you mean if I ignore it and just keep booting up without checking?


If was shutting down quickly after a cold start up then its more than likely a thermal even (Getting too Hot).
So each time you tried to re-boot the pc it would still carry over that heat and a thermal event would happen a bit quicker.

Processors need to be cooled. A motherboard can detect over heating and shut it all down to prevent permanent damage. Or kill the pc, no soft shut down just OFF !

And the same situation can result in a loose wire its connected or its not.

If its running ok now after you plugged the leads back it, that's great disaster over.

Repeated Thermal Events can dry out the contact pate between your processor and heat sink. Which makes the paste useless.

Hope that helps.
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#835436 - 6th Nov 2013 3:42pm Re: PC turning on and off repeatedly [Re: mikeeb]
Gibbo Online   content
Forum Addict

Registered: 27th Dec 2010
Posts: 1835
Loc: Oxton
My HP does it every so often, there's an issue with the memory slots (same with some Dells too), and if I take out the RAM, give the slots a clean with compressed air that sorts it.

I think its known as "chip creep".

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#835437 - 6th Nov 2013 3:47pm Re: PC turning on and off repeatedly [Re: mikeeb]
mikeeb Offline

Wise One

Registered: 8th Oct 2013
Posts: 795
Loc: birkenhead
It was probably a loose wire as all is still ok
If it happens again think I will check the contact paste
Cheers Mark

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