Oops, LAPSUS:
I meant 'should not be SPST, should be: Standard Pushbutton Switch

James Bald wrote in message ...
I'm guessing some wild ideas he
1- Sounds like your switch is acting like if you pressed it, and it remains ON.
That has the effect of telling the PSU to shut down after a delay.
Is that front panel power switch Vintage ?.. It should be SPST