man009 Posted September 16, 2012 Report Share Posted September 16, 2012 Dear AllI am having many faulty power supply of pCs i.e. Computer of 400 w to 650 Wattwill any one please help to suggest how to check it and how to repair it Hope i will get the solution on this site waiting for the reply Thanks in advacne Quote Link to comment Share on other sites More sharing options...
OPA Posted November 23, 2012 Report Share Posted November 23, 2012 check1. the fuse2. the 5V stand-by power supply (the lead is often violet)3. The PWM ic if it is UC3843-UC3845 check the voltage pin8-pin5(should be 5V) if it is TL494 check the voltage pin 14 - pin 7 Quote Link to comment Share on other sites More sharing options...
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