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PC shuts off automatically

My PC turns-off automatically, do not know what is going wrong. Any help from the experts is welcome. Please help. My PC config - P4 1.7 GHz
                                                  Intel chipset Vintron m/b
                                                  128 x 1 ddr + 256 x 1 ddr
                                                  40 GB x 1 + 60 GB x 1
                                                   national semiconductor PCI NIC
                                                   WinXP pro + Win 2000 pro + Fedora core 4
Thanks
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sonuanu
Asked:
sonuanu
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1 Solution
 
CallandorCommented:
If the power is shutting off randomly, I would suspect the power supply or bad capacitors on the motherboard.  Try swapping the power supply first.
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Nick DennyCommented:
Another common problem for auto shutdowns is overheating.
Check usual thing - dust build up, fans working etc...

Is it rebooting or just shutting down completely?
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sonuanuAuthor Commented:
It shuts down completly.

There is no fixed time period after which the PC will turn off. It can happen at anytime. In windows this will happen more frequently than linux, But this will happen.
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compfixer101Commented:
any hardware changes recently?

cf101
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Mohammed HamadaSenior IT ConsultantCommented:
How much time does the coomputer need to shut down after you log on windows and linux??

I guess the processor is engaged in to this issue, Windows takes much of the processor power than in linux due to the huge number of calculations that windows does before while and after booting into the account user..

I suggest that you try and swap the processor with another one for test purpose, if it passes for 30 mins with the new one then it's the processor..

Check the following link, it might help...
http://motherboards.mbarron.net/download/
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BennyM82Commented:
Sit the PC in safe mode for a good period of time and check if it still shuts down.
Next thing would be to try sitting the pc in the BIOS screen for a long period of time and checking if it still shuts down.

It could also be memory, powersupply, or possibly (unlikelily) the mobo or CPU.
It could also be drivers.
Ensure your BIOS is set to 'Soft off' so that if software is doing it you might be able to tell. I.e. it wouldn't power straight off.
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sonuanuAuthor Commented:
No hardware change

In windows PC runs for 5 to 10 min and in linux 20 to 30 min.

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BennyM82Commented:
Try it sitting in the BIOS screen, and it could still be hardware issue that has recently cropped up (without it being a result of hardware change).
Try a different power supply / vid card and memory
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nobusCommented:
check here the power you need :  http://www.jscustompcs.com/power_supply/
or try another power supply.
check the cpu temp (in the bios) after it shuts down
test your Ram with memtest86+ from :  http://www.memtest.org/      
disconnect all devices not needed for testing (drives, ram, cards ...)
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nobusCommented:
is there no blue screen? try to disable the autorestart function : boot to safe mode (hit F8 key during boot) and select this option
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Mohammed HamadaSenior IT ConsultantCommented:
Have you tried swapping the processor?
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juandelacruz2001Commented:
Can this be a CPU thermal problem? If you haven't changed/swapped CPU yet, you may have to verify if you have enough cooling on this box.
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sonuanuAuthor Commented:
Hi all experts

Thankyou all experts for the valueable advice by which I am able to solve my problem. I want to thank Callandor specially, whos pinpoint advice of replacing SMPS solves the problem without any futher delay.

My PC is running fine on all OSs without a fail for the last 2 days.

Thanks to All
Bye
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