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PSU or motherboard failure?

Last response: in Components
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January 10, 2013 8:44:44 PM

Hi,
My computer stopped working. I don't know what the problem is.

Symptom: When turning the computer on there is a short movement of the fans (the PSU fan and the two fans that are connected to the motherboard). Then nothing happens. This is repeated as long as the power is on.

I have unplugged all cables and reconnected. I also tested the power supply by shortcutting the 20pin connector with a paper clip. The PSU run OK then but not when the connector is connected to the motherboard.

Is it a Power supply problem? or a motherboard problem? or something else?

here's a video of my problem.
http://youtu.be/1eR1Gnag5Fc
a b ) Power supply
a b V Motherboard
January 10, 2013 9:00:33 PM

I think its your motherboard but please do tell me, have you tried turning on the computer without the graphics card installed? 550 watts looks like enough for your system but if you have a crappy PSU powering the whole thing then thats a dead answer right there.
a b V Motherboard
January 10, 2013 9:18:05 PM

Try resetting the cmos - unplug and remove the battery for a couple of seconds if you don't have a clear cmos button. reinstall and plug it back up and try again.
!