As soon as you jump the green and black the PSU's internal fan should start spinning which indicates that it's outputting power. If that's not happening then something is definitely wrong.
Turning on the psu without any load is not a very good idea
For short term testing, yet. But you don't want to leave a PSU on for an extended period of time with no load.I've been doing it for about seven years now and never had a problem. It's a pretty well known trick and I've never heard of anyone blowing a power supply doing it.
For short term testing, yet. But you don't want to leave a PSU on for an extended period of time with no load.
Switched mode power supplies have an absolute limit on their minimum current output. They are only able to output above a certain power level and cannot function below that point. In a no-load condition the frequency of the power slicing circuit increases in speed, causing the isolated transformer to act as a Tesla coil, causing damage due to the resulting very high voltage power spikes. Switched-mode supplies with protection circuits may briefly turn on but then shut down when no load has been detected. A very small low-power dummy load such as a ceramic power resistor or 10-watt light bulb can be attached to the supply to allow it to run with no primary load attached.I'm sorry, but why? I don't believe that there is any evidence to suggest that running a power supply with no load it any worse for it than running it with a load.
Switched mode power supplies have an absolute limit on their minimum current output. They are only able to output above a certain power level and cannot function below that point. In a no-load condition the frequency of the power slicing circuit increases in speed, causing the isolated transformer to act as a Tesla coil, causing damage due to the resulting very high voltage power spikes. Switched-mode supplies with protection circuits may briefly turn on but then shut down when no load has been detected. A very small low-power dummy load such as a ceramic power resistor or 10-watt light bulb can be attached to the supply to allow it to run with no primary load attached.
Switched mode power supplies have an absolute limit on their minimum current output. They are only able to output above a certain power level and cannot function below that point. In a no-load condition the frequency of the power slicing circuit increases in speed, causing the isolated transformer to act as a Tesla coil, causing damage due to the resulting very high voltage power spikes. Switched-mode supplies with protection circuits may briefly turn on but then shut down when no load has been detected. A very small low-power dummy load such as a ceramic power resistor or 10-watt light bulb can be attached to the supply to allow it to run with no primary load attached.
Typically power supply fans are fairly silent and rotate at lower RPM's then your average case fan, and the one's I've found typically draw between 1-5W. Still, it's not ideal to operate them without any additional load for an extended period of time, as I explained in my previous post.Modern power supplies do not need a true load in order to maintain a minimum output. One shining example of this is the fan integrated into the power supply, which is run off of the +12v dc output of the power supply, and that alone can be anywhere from 3-10W draw.
Typically power supply fans are fairly silent and rotate at lower RPM's then your average case fan, and the one's I've found typically draw between 1-5W. Still, it's not ideal to operate them without any additional load for an extended period of time, as I explained in my previous post.