Hello friends. I have a switched source of 8Amp and 14v. The source delivers 14 volts but when the load is placed the voltage goes to 0v. Which component will be damaged? I already rectified all the welds and still the same.

as indicated by the partner, verify that the condensers understand in good condition if you do not have to change them if the problem persists verify the fat capacitor of the input. oscillation or the reference ic located near the optocoupler