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Computer Turns Off For No Reason


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#1 dave91

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Posted 26 October 2007 - 03:56 AM

Hi all
im new round here and wondering if any1 could help me
my computer seems to turn off randomly for no reason at all and then when this happens im not able to turn it on for a while, usually around 30-40 mins. ive tried pluggin/unpluggin the power cable and also flicked the power switch on and off in an attempt to get the comp to turn on again. At first i thought the problem was due to over heating, but i have removed the cover and yet the problem still occurs.
ive had problems with it in the past where it used to restart for no reason but thats been fixed with a new motherboard and ive also had the power supply changed about 6 months ago. the power supply is a frontier 450W, motherbaord is an ASRock P4VM800, processor is intel pentium4, the OS is XP.

any help would be appreciated

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#2 Budapest

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Posted 26 October 2007 - 04:00 AM

While you've got the cover open check that all the fans are spinning correctly and that the heat sinks over the processors aren't choked with dust.
The power of accurate observation is commonly called cynicism by those who haven't got it.

—George Bernard Shaw

#3 dave91

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Posted 26 October 2007 - 04:54 AM

the fans work fine, do i have to remove the fan covering the processor to check the heatsink? as i seem to have a heatsink next to the fan covering the processor.

#4 Budapest

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Posted 26 October 2007 - 05:05 AM

It depends. You may be able to see if the the heatsink is clogged with dust without removing the fan. If you're not comfortable removing the fan don't bother. You can check your system temps using SpeedFan to see if you have any overheating problem.
The power of accurate observation is commonly called cynicism by those who haven't got it.

—George Bernard Shaw

#5 dave91

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Posted 26 October 2007 - 06:10 AM

ok thanks for that but at the moment the computer wont turn on. any ideas?
sorry to be a pain..

#6 Budapest

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Posted 26 October 2007 - 06:13 AM

What happens when you try to switch it on? Does anything show on the screen? Do any of the LEDs on the case light up?
The power of accurate observation is commonly called cynicism by those who haven't got it.

—George Bernard Shaw

#7 dave91

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Posted 26 October 2007 - 06:20 AM

nope the computer doesnt do anything not even a startup the fan moves a tiny bit thats about it. screen shows nothing. no LEDS since i got the motherboard replaced 6 months ago, the green and yellow LED at the front of the comp havent worked.

#8 Budapest

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Posted 26 October 2007 - 06:25 AM

Well I'm about out of ideas.

The only thing I can suggest is to strip the system down to the bare bones. Take out anything that is not required for the computer to boot such as the video card, sound card, network card, CD/DVD drive and then see if it will boot. If it does then you know the problem is with one of the items you removed. You could put them back in one by one until you find out which one is the problem.
The power of accurate observation is commonly called cynicism by those who haven't got it.

—George Bernard Shaw

#9 dave91

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Posted 26 October 2007 - 06:40 AM

alright will do cheers

#10 dave91

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Posted 27 October 2007 - 05:12 AM

ive managed to get a green LED light on the comp, turns out a plug was loose. any ideas?

#11 Budapest

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Posted 27 October 2007 - 05:32 AM

First thing I would do is check all the other connections. Did you try taking out the sound card etc?
The power of accurate observation is commonly called cynicism by those who haven't got it.

—George Bernard Shaw

#12 Manshead

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Posted 27 October 2007 - 05:40 AM

I had a very similar problem. It turned out to be the power supply unit.
Handle every situation like a real man.
If you cant eat it or drink it.
Walk Away, it Aint worth the hassle.

#13 dave91

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Posted 28 October 2007 - 01:56 AM

i took out the graphics card and unplugged the power cable for the comp (which i hadnt done previously) and ran the comp and it worked. i then tried it with the graphics card and it ran. and throughout all of it the green LED was on, so could it be the problem stopping the comp turning on be the power cable or something else??? i dont get it =S

#14 wagepacket1

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Posted 28 October 2007 - 04:39 PM

i took out the graphics card and unplugged the power cable for the comp (which i hadnt done previously) and ran the comp and it worked. i then tried it with the graphics card and it ran. and throughout all of it the green LED was on, so could it be the problem stopping the comp turning on be the power cable or something else??? i dont get it =S


Hello /
have you tried doing this , go to start then cp then system then advanced then start up & recovery , there might be something there mate good luk
Have a good day .
do you
you like the car ?
1000,000

#15 Budapest

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Posted 29 October 2007 - 01:29 AM

i took out the graphics card and unplugged the power cable for the comp (which i hadnt done previously) and ran the comp and it worked. i then tried it with the graphics card and it ran. and throughout all of it the green LED was on, so could it be the problem stopping the comp turning on be the power cable or something else??? i dont get it =S

I don't quite understand what you mean. Did you boot the computer with the power cable unplugged??? :thumbsup:
The power of accurate observation is commonly called cynicism by those who haven't got it.

—George Bernard Shaw




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