General discussion

PC shutsdown without warning. Not Overheating

Mar 24, 2007 9:04AM PDT

My computer keeps shutting down on its own. I put on a liquid cooling system after several heat sink and fan combos did not work and it still does it.

When I start it up, it powers up for half a sec then shuts down, then after a sec, it starts back up on its own. I thought that might mean not enough power, so I put on 100 watt larger power supply.

Any ideas?

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Reply to: PC shutsdown without warning. Not Overheating
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My plan
Mar 24, 2007 9:18AM PDT

I would take everything out of it execpt what is needed. Check everycable and switch and chip is secure. Make sure your powersupply isn't set-up for european ac. Try a different outlet. Then try booting again. If you can't even get into bios i'd look into a new motherboard. But I wouldn't rush for that one, any1 else?

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tried it
Mar 25, 2007 12:00AM PDT

I tried eliminating everything that I could even down to 1 stick of ram and it still shuts down below 90 degee f.

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Since you've covered the CPU and the about the
Mar 25, 2007 1:06AM PDT

RAM....have you tested that with Memtest86+?

How about the CPU and RAM voltage settings ?

What are you using to validate the 90F temp reading ?

What MB, CPU, RAM and PSU are you using ?


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Mar 29, 2007 8:13AM PDT

I am using default bios settings for everything.

The temp reading is from a coolmaster liquid cooling system and if i set the system shut down warning to above 90 it doesnt beep at me. If I set it below 90, it still doesnt beep. That makes me think its not temp problem.

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Try testing the RAM with memtest86+ and let us know
Mar 29, 2007 1:15PM PDT

about when the system shuts does it shutdown with 15 30 or 60 minutes after bootup ? Or only after running a program or game ?

How is the chipset cooled ?


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Temperature scale
Mar 29, 2007 11:51PM PDT

Is that setting 90

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(NT) His second reply gave F [in lower case, LOL]
Mar 30, 2007 12:03AM PDT
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(NT) Missed it. Thanks, Ray!
Mar 30, 2007 12:21AM PDT
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How do you know that?
Mar 24, 2007 9:29AM PDT

What temperature data do you have for the CPU?

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You need a new mother broad
Mar 30, 2007 12:57PM PDT

You need a new mother broad.

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What makes you say he needs a new mobo?????????????????????
Oct 4, 2016 2:37PM PDT

What brings you to that conclusion....? Could be the CPU still or many other things.....sp please share your expertise on how you reached that as a remedy.

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I agree. Now that another 9 years has passed.
Oct 4, 2016 2:52PM PDT

It's 90% or higher chance they are right!

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It's not overheating now.
Mar 30, 2007 7:21PM PDT

The first Pentium machine I bought suffered this problem. It would work fine, but suddenly reboot without provocation.

It was not overheating and it was not required to do anything particularly difficult. However the self-restarting problem became more and more frequent.

I suspect this problem was the reason the machine was sold.

I later learned the following theory:

The chip HAD been overheated previously, which results in an internal semi-short developing inside the chip. This apparently keeps developing to the point that eventually it keeps shorting the chip so frequenty that it can never successfully boot.

This "theory" tied in with the way my machine was behaving. I eventually replaced all of it becuase playing around with bits and pieces was getting me nowhere.

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PC shutdown
Mar 30, 2007 8:06PM PDT

Ok I'm no real expert but a friend of my ex-girlfriends had the same problem. It turned out to be a virus that was causing the problem. Of course you couldn't load anything to deal with it because the damn thing was shutting down before you could get to it. Unfortunately it came down to taking it to a shop to be repaired and I don't know the virus definition. So really take it to a shop!

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pc shut down
Mar 30, 2007 8:11PM PDT

I had a proplem like that until i changed the settings on energy properties read how to through search for energy properties.

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power supply problem
Mar 31, 2007 12:41AM PDT

This pc shutting down happened to me the it was corrected by changing the power supply

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PC shuts down- not a temp problem
Mar 31, 2007 12:50AM PDT

The first thing to check is the capasitors on the mainboard (the metal barrels about the diamater of a pencil) If any of the tops are puffed up, it the mainboard. The second thing is the RAM, then the power supply. If it may be software then disconnect your hard drive and connect another hard drive on it and install a fresh copy of windows.

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PC Shutdown
Mar 31, 2007 9:12PM PDT

I am not so techaware so I would do a restore to a previous ok time. Do it in safe mode

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ps shut down
Apr 1, 2007 9:01PM PDT

I,ve been repairing puter,s for some 30+ years now,,,,,,,,you have a reboot virus,,,,,seen this happen all to many times,,,,,do a complete virus scan,,,,,,(in safe mode)....

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May Be Switch
Apr 1, 2007 11:11PM PDT

Hi LoneReaper,
I also had the same problem a while back. I tried everything possible and it turned out out to be faulty on/off switch on my case. It was sometimes making contact then not. I could be lucky and pc would stay on for hours, but sometimes minutes or seconds. After weeks of trying all else, that was the problem. May be worth looking at. HTH.

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Apr 2, 2007 8:20AM PDT

I had also a problem with the PC shutting down with no apparent reason. It made me crazy for a while. The problem was a defect RAM module. Look for a small piece of software on the internet to check up your RAM, sorry but I cannot remember the name, the problem was on an old computer. I removed the defect module and everything came back to normal.
Good luck

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faced this issue year before
Oct 12, 2016 3:10AM PDT

I faced this issue year before. Firstly, you just need to make backup of your data before you lose it then take guidance of experts who can actually get you out of this mess. You have already tried much, so I suppose it’s now a time to take it to PC repair specialist.

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This old post is closing.
Oct 12, 2016 12:10PM PDT

Please start a new discussion as old posts rarely get replies.

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