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Old 14th September, 2005, 04:51 AM
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power supply bad?

Hello all..small problem.
Went to turn on my computer this afternoon after work. Would not do anything, no lights, no fans, nothing. Was working just fine last nite when I shut if off. And now nada. The fan in the power supply does not even spin. Tried wiring across the switch, still nothing.
Can I assume the power supply failed last nite somehow even though the computer was off?

Thanks in advance,
Don
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Old 14th September, 2005, 05:06 AM
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in reality it probably failed this morning when you booted it.. if its an ATX you can short thr green wire on the mobo connector to one of the black ones and it will spin the fan up if its got any life.
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Old 14th September, 2005, 05:48 AM
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Surly Joe, just tried to short across those two wires and nothing. No fan at all. So in reality they can just stop dead...no sign they are going bad?
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Old 14th September, 2005, 02:57 PM
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ya, they pull thier biggest load when the hard drives spin up right at boot, thats prolly when it failed, sometimes they give a little tuft of smoke but not always
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Old 14th September, 2005, 05:24 PM
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gardman try to connect a load e.g. a fan (at least 0.10 A) in a free molex some PSUs don't turn on using this trick.
Here is the proper connection:
Attached Thumbnails
power supply bad?-getfile.jpg  
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Old 15th September, 2005, 02:23 AM
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Friends, I have to thank you again for a great diagnosis. Replaced the power supply today and all is well and good again!

Again thank you!!
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Old 17th September, 2005, 01:01 PM
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Very nice!
But check PSU voltages using a multimeter.
If you don't know why click here it's easy.
In my opinion any overclocker should have a multimeter cos monitor programs shows anything.
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