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PC keeps on turning off

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  • Power Supplies
  • Computers
  • Motherboards
  • Components
Last response: in Components
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September 1, 2012 9:47:32 AM

Hey guys, I'm in desperate need of help.
I was playing Darksiders 2 then suddenly my computer shuts down.
After trying to reboot I can't seem to reach the windows loading screen.
It just shuts itself down after showing the motherboard screen.
I managed to go past the motherboard screen one time but I was
presented with a "Windows system repair". I clicked it and while it
was loading it suddenly shut down again. I'm not really tech savvy so I have no
idea what to do. Could it be my PSU that's causing this to happen?
Also, now it won't even go past the motherboard screen. I can't access the
BIOS either. It just freezes.

More about : turning

a b ) Power supply
a c 76 V Motherboard
September 1, 2012 9:54:12 AM

remove/clean/reapply thermal paste and reseat the heatsink on the processor. clean the video card of dust. same with heatsink on processor. bad power supply could cause this also. can you try another ? sounds like a heat issue associated with the processor. or a shot processor. only way to tell is to keep trying stuff til you find an answer.
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September 1, 2012 9:59:11 AM

Take your side panel off and check to make sure all the fans are working properly when it first turns on. Most notably the CPU fan. If that sucker fails, the CPU will attempt to protect itself from overheating (assuming it's new enough). While you're in there, spray the dust out with a can of compressed air.
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September 1, 2012 10:23:04 AM

Okay I'll try cleaning it.
I also have a spare psu but I haven't used it in a long time.
Is that still ok?
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a b ) Power supply
a c 94 V Motherboard
September 1, 2012 10:54:08 AM

Jmskii said:
Okay I'll try cleaning it.
I also have a spare psu but I haven't used it in a long time.
Is that still ok?

If your computer was working fine for gaming and is now boot-looping, my guess would be bad PSU. An old PSU is fine as long as it is known-good and sufficient for your build. Otherwise you might be replacing a dying PSU with a bad/worse PSU.

Since booting does not use as much CPU-power as playing games, it seems unlikely that the CPU would mysteriously start overheating in mid-game, shut down and now spontaneously overheat during boot/POST.
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September 1, 2012 11:17:37 AM

The thing is this spare psu I have is really bad.
Can I just use this to test if it boots properly?
Also I think my windows got corrupted too because the last time I had the
Chance to get past the motherboard screen it showed me a "windows repair" option.
Also, while I was cleaning I noticed that there is barely any thermal paste left. I don't have any thermal paste with me so I can't replace it yet. Would it be ok if I still try to boot my pc?
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a b ) Power supply
a c 94 V Motherboard
September 1, 2012 11:30:26 AM

Jmskii said:
Also, while I was cleaning I noticed that there is barely any thermal paste left. I don't have any thermal paste with me so I can't replace it yet. Would it be ok if I still try to boot my pc?

Thermal paste does not mysteriously vanish. If there is "barely any paste left", it was never there in the first place. Since thermal paste's only job is to fill cracks between the CPU and HSF, the amount that is really needed is miniscule when the two surfaces are almost perfectly flat.

Booting the PC with no paste at all is not recommended. Even mayonnaise and toothpaste are apparently better than nothing.
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September 1, 2012 11:36:16 AM

InvalidError said:
Thermal paste does not mysteriously vanish. If there is "barely any paste left", it was never there in the first place. Since thermal paste's only job is to fill cracks between the CPU and HSF, the amount that is really needed is miniscule when the two surfaces are almost perfectly flat.

Booting the PC with no paste at all is not recommended. Even mayonnaise and toothpaste are apparently better than nothing.


I see. Well there is a small amount of it.
I just thought you need a lot.
I'm currently in the process of switching out the psu.
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a b ) Power supply
a c 76 V Motherboard
September 1, 2012 11:44:14 AM

there should be enough to cover the entire surface of the processor. if you are looking at it you must have pulled the heat sink off............ do not reinstall it without cleaning off the old and reapplying new thermal paste....clean both the processor top and bottom of heat sink.... reapply to top of processor and smooth out. ....

............. and NO, mayo is NOT a substitute so don't use it.................. sometimes people shouldn't say funny things.... ahem.
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a b ) Power supply
a c 94 V Motherboard
September 1, 2012 11:53:07 AM

Jmskii said:
I just thought you need a lot.

You only need enough for it to spread into a thin coat across most of the IHS when the HSF is installed to fill the gaps. Any more than that and the extra paste will either ooze out of the edges or stay between the IHS and HSF, preventing the two from getting as close as they could for optimal heat transfer.

Ideally, you would want perfectly flat surface for direct metal-to-metal contact between IHS and HSF. Paste exist because perfectly flat surfaces are not practical to manufacture and tend not to stay perfectly flat for very long outside a temperature and moisture controlled lab.
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September 1, 2012 11:57:52 AM

Ok now after changing the psu I tried to boot it up.
The bad thing is I heard a loud noise coming from the CPU and when I looked at it I saw
A spark then it suddenly turned off. This scared the crap out of me.
I'm afraid I caused more damage. I'm gonna try and just ask for help from my cousin.
Thanks for the replies guys. I appreciate it.
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a b ) Power supply
a c 94 V Motherboard
September 1, 2012 12:00:05 PM

swifty_morgan said:
............. and NO, mayo is NOT a substitute so don't use it.................. sometimes people shouldn't say funny things.... ahem.

I haven't tried it myself but TechPowerup did:
http://www.techpowerup.com/forums/showthread.php?t=1538...

Mayonnaise performs surprisingly well, at least short-term. It is the "highest-performance" makeshift thermal compound on their chart.
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a b ) Power supply
a c 76 V Motherboard
September 1, 2012 12:23:16 PM

InvalidError said:
I haven't tried it myself but TechPowerup did:
http://www.techpowerup.com/forums/showthread.php?t=1538...

Mayonnaise performs surprisingly well, at least short-term. It is the "highest-performance" makeshift thermal compound on their chart.



............. LOL...............
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