Sometimes it becomes necessary to start the power supply unit (PSU) without connecting it to the computer. For example, you want to check its performance or noise level before deciding whether to install the device in a computer or look for a quieter model.
Necessary
power supply unit of ATX standard
Instructions
Step 1
Almost all modern power supplies are ATX units. Next, we will consider the procedure for turning on just such a power supply. Check if your PSU complies with the ATX standard. You can read the relevant information on the device body.
Step 2
The very procedure for starting a power supply without a computer requires compliance with certain safety rules. Before starting the procedure, the power supply unit, of course, must be disconnected from the mains. You will need a small wire, from both ends of which you need to strip a little insulation (a few millimeters is sufficient).
Step 3
Plug the power cable into the power supply, but do not plug it into the mains. Then plug one end of the wire into the PS-ON connector. Usually a green wire fits this connector, but on cheap Chinese power supplies, the color of the wire may be different. Connect the other end of the wire to one of the GND (COM) connectors (black wires go to them).
Step 4
Then plug the power cord into the electrical network. The power supply will start working. True, it is better not to use the device in this mode for a long period of time due to the fact that it works without load.
Step 5
But if you need to check the noise characteristics of the power supply, it may take time. In this case, connect several devices to the PSU, for example, an optical drive or a hard disk. In this case, the power supply unit will work with the load, therefore, it will be possible to use it longer. In addition, in this way you minimize the risk of device failure.
