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Eurowirral
by diggingdeeper - 5th Nov 2026 11:00am
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Joined: Oct 2013
Posts: 1,635 Likes: 1
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OP
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Joined: Oct 2013
Posts: 1,635 Likes: 1 |
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.htmI 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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Joined: Nov 2003
Posts: 21,270 Likes: 8
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Wiki Master
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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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Joined: Oct 2013
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OP
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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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Joined: Oct 2011
Posts: 783
Wise One
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Wise One
Joined: Oct 2011
Posts: 783 |
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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Joined: Oct 2013
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OP
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The heatsink is solid
The pc is only a year old
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Joined: Nov 2003
Posts: 21,270 Likes: 8
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Wiki Master
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If its working ok now. then it could have been a loose connection.
You Pc Vibrates and anything is possible.
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Joined: Nov 2003
Posts: 21,270 Likes: 8
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Wiki Master
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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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Joined: Dec 2010
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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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Joined: Oct 2013
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OP
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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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