System shuts down immediately after few sconds

Posted by Anil on Super User See other posts from Super User or by Anil
Published on 2012-10-22T03:00:54Z Indexed on 2012/10/22 5:05 UTC
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I have a computer with following specification and was working fine after re-installing the system and refitting sink fan unit.

Recently it shuts down automatically after a few seconds. I checked PSU by shorting pin no.s 13 & 14 as well as 14 & 15. It worked well means the PSU fan moves. But I never checked the voltages at different wires.

I refitted the heat sink fan by applying thermal paste. but it behaved the same. Again I refitted the Heat Sink Fan, then it worked for 2 minutes and again shut down.

Now it shuts down immediately after switching on.

Mother board  : M26GTM-3VP
CPU : AMD athlon
PSU : 450 watt

Can anyone help?

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