Looking for Dell power supplies atx machine diagrams ?

Thread Starter


Joined Aug 28, 2018
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 ?

MOD: Uploaded your image.


Last edited by a moderator: