dead psu

Aug 06, 2005 2 Replies
Y

greetings,



can anyone direct me where to troubleshoot a dead atx psu. a green wire was already shorted to ground (black) but nothing happens.



i read from the net that almost all concepts of AT and ATX psu are the same.



The differences are: that ATX PSU always has +5V standby (what color of a wire is the sb?), it powers up through logic circuit (maybe through ic w/c is in the psu itself) and that it can be controlled by software.


i already have repaired AT psu many times but i do not try ATX yet.


thanks in advance,



ian



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D

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Dave M MasonDG44 at comcast dot net (Just subsitute the appropriate characters in the address) Never take a laxative and a sleeping pill at the same time!!
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C

i have repaird 2 atx so far. i found i one of them the small electro cap for the 5v sb leaky. the other one i put new electro caps onthe output side, thay were leaky and bubbeld up. so you have the 5vsb supply then check the main swtching transistors and the small electro caps around them and the resistors as well, if all ok check all the output electro caps.

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