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If it is a computer power supply it is the box that gives the computer its power from the outlet.
The ground prong is connected to the computer chassis, including the outside of the power supply module. This is a safety feature to ensure that the metal case of the computer and power supply never becomes dangerously electrified in the event of a loose wire. Modifying the power cord not to have a ground prong would violate electrical codes intended to prevent accidental electrocution. That said, the ground prong is not essential for the normal operation of the computer, and the computer will still function without it. Proceed at your own risk.
The "power supply" supplies power to a computer. A computer's power supply is a "switchmode power supply" responsible for converting the AC voltage from the wall into several DC output voltages.
When your computer will not power on. When the cooling fan of the power supply has failed. When the amount of hardware in use in your case exceeds the power capability of your power supply.
You can use a power bar to ground yourself if it's plugged in. Since the ground wiring normally bypasses the on/off switch, it doesn't have to be turned on either.Additonally, if you are working on a computer that has an on/off switch on the power supply, you can keep the computer case grounded by leaving the power supply plugged in with the switch off. This offers an additional layer of protection from electrostatic discharge.
The power supply makes the computer run, without any type of power supply it would be impossible to run a computer. The mains power supply for a laptop and the power supply unit of a desk top, both convert the high AC voltage from the mains power and convert it to low voltage DC, for the electronics of a computer to use.
Bad PSU, (power supply). Did not install motherboard right in case, and bad ground.
In order to supply power supply to your computer you would need an outlet plug near your computer. Then you can plug your computer into that and necessarily, use an extension.
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Don't worry... more watts available is unnecessary, but cannot harm your computer. Less watts than needed could harm your computer. For dealing with motherboard and other devices you should usually ground yourself. However when you deal with your power supply make sure you do not earth yourself as this could harm your power supply or even you.
SMPS(switch mode power supply)
To power all the components of a computer.