(solved✔)Low green wire voltage 3.3v ps-on power atx

[electronium]

Low green wire voltage 3.3v ps-on power atx

Hello friends of the forum I have an atx power supply that has standby voltage conditions. The voltage of the purple wire is 5 volts and the voltage of the green wire ps-on is 3.3 volts and the power switch does not start. What is the problem and where is it ?:meh:

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It's been a few years since this topic and post, but I didn't lose it. It took me a lot of time to work on this power. Finally, I found the problem and fixed it.
It is very interesting that the green wire is the same voltage, but the power works properly