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Problem with 300W ATX Power Supply

 
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srinath_adipudi
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PostPosted: Sun Apr 23, 2006 5:51 pm    Post subject: Problem with 300W ATX Power Supply Reply with quote

hi this is srinath. i have a problem with my SMPS. Actually it power up only for 2 sec. and then i shuts down. i removed it and i switched on the power supply by shorting the Green and the Black pins. same thing repeats it starts and then shuts off. i thought it must be the loaded but switching on the power supply without anyting should work. please i need help on this please
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PostPosted: Mon Apr 24, 2006 4:20 pm    Post subject: Reply with quote

If you power up the supply with no load you will blow it up!
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PostPosted: Thu Apr 12, 2007 8:08 am    Post subject: Reply with quote

You will not blow it up. I had one PSU that shut itself down immediately. It was the big rectifying diode after the 5VSB transformer. Also, you will have to connect a dummy load, such as an old CD-ROM drive.
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PostPosted: Fri Apr 13, 2007 8:11 pm    Post subject: Problem with 300W ATX Power Supply Reply with quote

What's the cheaper option?
A faulty power unit AND a wrecked motherboard, cpu etc. or simply replacing a power supply. It wouldn't do any harm to replace the power unit anyway as they are cheap and if it works then you have just provided a bit of preventive maintenance as the capacitors etc are new.
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shadow99



Joined: 24 May 2007
Posts: 2
Location: Canada

PostPosted: Thu May 24, 2007 4:34 pm    Post subject: Reply with quote

The problem is most likely bad electrolytic capacitors. Bad ones are easy to spot, they'll be bulged at the top of the can and/or leaking brown crud.
This problem affects alot of equipment, motherboards, etc..
They can be replaced.
For more info:
www.badcaps.net
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