Hi,
I am sure I have understood your reasoning.
The power supply is not tripping by itself.
What is happening is If, for some reason (usually a small glitch in the 127AC supply) the supply shuts down, I have to unplug the 127AC power plug and left it unplugged for 10-15 min.
After that period of time, I can reconnect the AC power and turn the SMPS on normally.
I can not see I should monitor the outputs since the SMPS is NOT tripping under load.
By the way, I found this information after some more internet search "an ICE2QR4765 Quasi-Resonant PWM Controller handles the standby mode of the PSU. "
Thanks,
Roger