power supplies atx computer desktops Model: H250AD-00, 5v power supply failure (green wire), STW9NK95Z mosfet front-end power supply and main STB23NM50N power lamp (other common circuits have two power lights The rectifier circuit is still working well, removing the STW9NK95Z from the circuit at G 0v pin, D 450v pin, S 0v pin, these two mosfets are still good but still no 5v green wire. How to check two ICs TNY274-280 and FAN4800A live or die ?
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