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safe to bake a psu?

post #1 of 9
Thread Starter 
hi guys i was wondering since i got a bad psu that turns on for only 2 seconds before turning itself off.

is it safe to bake a psu to try to make it LIVE again?
and if so at what temp should i preheat the oven
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post #2 of 9
As always, baking has dangers, and all the components would prefer not to be subjected to those kinds of temperatures.

The bigger deal is that a power supply that doesn't work is very probably a result of something other than a bad solder joint. If it turns on barely, that probably means the whole circuit is connected, so it's not a bad solder joint. So baking won't fix whatever is wrong with it.

If, for example, some capacitors are blown and the power supply can't operate stably because they're running so out of spec, heating the caps up even more is the opposite of what you want to do.

Have you confirmed the power supply doesn't work in general? Tried in another system? Tried with less things plugged in? Tried to jump start without connected to motherboard, via green+black wire paper clip test? And so on.

You should just get an RMA on the PSU if it's under warranty, or otherwise replace it.
post #3 of 9
Thread Starter 
no this psu is just a tester psu basicly i dont use it for major powering or long term use
and yes it does the same thing with nothing connected with the green+black jumper
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post #4 of 9
Where I work, we only sell a local brand of computers. They don't have the greatest power supplies. We average a power supply failure on these machines once every two weeks at EXACTLY six years old. More often than not, it's blown a capacitor - this is something that can't be backed. It isn't like a video card where a cold solder joint heated up and broke lose.

Generally, power supplies are "disposable" and NOT serviceable - its a bit dangerous. However capacitor replacements aren't out of the question.
    
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post #5 of 9
It should not taste good ...
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post #6 of 9
Quote:
Originally Posted by IBuyJunk View Post
Where I work, we only sell a local brand of computers. They don't have the greatest power supplies. We average a power supply failure on these machines once every two weeks at EXACTLY six years old. More often than not, it's blown a capacitor - this is something that can't be backed. It isn't like a video card where a cold solder joint heated up and broke lose.

Generally, power supplies are "disposable" and NOT serviceable - its a bit dangerous. However capacitor replacements aren't out of the question.
This.

Many power supplies (and motherboards) from around 4-8 years ago are prone to failing capacitors. Baking them wont fix this, as its caused by a bad electrolyte design, building up pressure until it fails. If anything baking would make it worse. Chances are if something goes wrong on a psu its most likely to be a capacitor.
     
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post #7 of 9
As the previous users said it could be a capacitor, if you know how to solder I recommend you to open the PSU cover and take a look at the Capacitors. Look for something like this



Take them out and buy new ones with same exact values and solder the new ones on the board.

If it doesn't work out then there are other components that might be fried like transistors/Rectifier/voltage regulators, Diodes. The transformer gets fried too sometimes which is a bit hard to replace.
Edited by Flakdiode - 10/3/11 at 8:57am
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post #8 of 9
Quote:
Originally Posted by adgame View Post
It should not taste good ...
Notsureifserious...
post #9 of 9
Quote:
Originally Posted by Flakdiode View Post
As the previous users said it could be a capacitor, if you know how to solder I recommend you to open the PSU cover and take a look at the Capacitors. Look for something like this



Take them out and buy new ones with same exact values and solder the new ones on the board.

If it doesn't work out then there are other components that might be fried like transistors/Rectifier/voltage regulators, Diodes. The transformer gets fried too sometimes which is a bit hard to replace.
Frankly I wouldn't even bother replacing the caps. If they failed it was probably a poor psu to start with.
Edited by alltoasters - 10/4/11 at 4:49pm
     
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