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PC power starts then stops immediately

By TheNo1entertainer ·
I have a Asus M2N-MX motherboard with AMD Athlon 64x2 4800 with 2 gig of ram. When I power up the pc tries to start but the power supply shuts down. I have stripped all power off and the only thing running is the mobo but the power supply still shuts down. It is only a few months old any suggestions???

Thanks in anticipation

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All Answers

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A common reason for shutting down is the CPU overheating

by Jacky Howe In reply to PC power starts then stop ...

Faulty Fans, Dust and Grime build up on the Heatsink restricting air flow. I would give the inside of the case a blowout with compressed air and then remove the Heatsink, giving it a thorough clean and reseat the CPU applying new CPU grease. If the Fans spin freely when you give them a spin they are probably OK. If there is resistance replace them.

Also check Capacitors around the CPU for swelling or bulging.

A faulty PSU can also cause it. Fluctuating power is no good for the motherboard. Try another one if available or replace it.

How to test PSU

http://www.driverheaven.net/guides/testingPSU/

http://www.ochardware.com/articles/psuvolt/psuvolt.html

http://www.journeysystems.com/?powercalc

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Not CPU

by TheNo1entertainer In reply to A common reason for shutt ...

Pc has been off for days and if I turn on pc is starts or say 1.5 seconds Pc cant be hot from that boot

will read other links tho ty

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Short circuit or PS

by bigloooser In reply to Not CPU

In my experience, I have usually found that there is something shorting out the PS. A couple things you may want to try:
1.Different RAM, it may be burnt(I did this just recently with some GIEL Black Dragon that wasnt being cooled properly)
2.Different PS, it may be that their is a short somewhere in the boot process that is causing the PS to immediately shut down.
I think that it is more likely that this is definately hardware related, rather than software. You can always try something less expensive to test your hardware. I keep cheap PS's around just for instances like this. Hope this helps.

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Another

by Jacky Howe In reply to Not CPU

thing to check is that the Heatsink is properly seated. I had one that was slightly skewif and caused the same symptoms. Not having grease between the CPU and Heatsink will also cause this problem. Try another PSU if you have access to one. Check your Switch that you are using to power the PC. A multimeter will soon let you know if the switch is faulty.

Newer Motherboards have better detection methods for possible CPU problems. The newer CPU's run a lot hotter these days.

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must be spring fever going around on PCs...

by CG IT In reply to PC power starts then stop ...

in the past couple of weeks, I think I've seen this type of question posted dozens of times....pc powers on and then off immediately...

wonder if this happens historically during the spring time?

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Probably

by Jacky Howe In reply to must be spring fever goin ...

something to do with Global Warming, i'll blame it as everyone else seems to use that excuse nowdays.

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