blowing power supplies

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DOCDave

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Feb 10, 2007
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Does anyone have a solution to why my motherboard is blowing power supplies? I read one post that had an answer that motherboards don't usually blow power supplies. WELL mine has blown TWO. I have a power supply tester and the second one I know was good just before plugging into the motherboard, now it energizes for about 2 seconds. If I turn the power supply off using the I/O switch on it I can get it to energize again. I have lighted fans, they light for about two seconds then go out, everything DEAD. I can repeat this process as many times as I wish with the same result. This problem just all of a sudden started. ANY HELP?
 
Joined
Jul 19, 2005
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11,670
I really couldn't find much information on that power supply, but apparently from this discussion the model LC-B400ATX may be manufactured by different manufacturers.

http://www.hardwareanalysis.com/content/topic/53955/

If you have blown 2 of them, then I certainly would be looking for a different brand. Good brands to consider are;

PC Power & Cooling, Antec, Seasonic, Enermax, Cooler Master, Thermaltake.
 

Frank4d

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Joined
Sep 10, 2006
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Go with one of the ones suggested above.

LC Power PSUs, made by Deer Computer Co, Ltd have a reputation for being cheapo crappy power supplies. Deer also makes Foxconn, Allied, Hercules, and about 10 other crappy brands.
 

crjdriver

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Jan 2, 2001
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41,751
I found some specs for that power supply; BTW it sells for $16.50 :eek: :eek: not a real quality unit. It is basically junk. Go with a quality power supply and your problems will most likely be fixed.
 

DOCDave

Thread Starter
Joined
Feb 10, 2007
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All of that is great HOWEVER it was running for two years without BLOWING power supplies. tyhen one day it would NOT power up. the second supply unit was one I had laying around and that one BLEW OUT when trying to power up the computer too. THERE IS SOMETHING ELSE wrong NOT the power supply unit. the second unit I took out of a 233 mh system I do not use anymore BUT WORKED.Thanks for input though.
 
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I would also consider taking a look at your power source. You may be getting too much juice from your electricity source. Have you tried connecting the pc elsewhere? How'bout a UPS?
 

crjdriver

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41,751
You may in fact have a problem with a motherboard however when you troubleshoot, you cannot use junk parts. It would help if you posted exact specs with links to your parts.
 
Joined
Feb 10, 2007
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289
yeah, check out the mobo, i know that certain gateways had 2 pins switched for the mobo plug, maybe gateways not the only one that did that
 
Joined
Feb 24, 2006
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are u using ur comps power button to turn on the comp after u turn on the power supply u know u have to right?
 
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