I don't own one of these supplies so i can't test it, but in this documentation you state a high standby current of possibly 1+ A, but that sounds way too high, that would mean it wastes 12W in standby. could you get the input power in standby?
I actually measured the power consumption when only the standby 12V is available. It's about 11.5 W doing nothing! So yes it wastes about 12 W in standby mode.
I don't own one of these supplies so i can't test it, but in this documentation you state a high standby current of possibly 1+ A, but that sounds way too high, that would mean it wastes 12W in standby. could you get the input power in standby?