Your computer's power supply is an essential component of your PC. Your power supply is the unit that plugs into the wall and directs power to your computer's components through a series of power leads. Power supplies come in different sizes and voltages. You may need to replace your power supply if you wish to upgrade power or if your old one is damaged. Changing your power supply can be achieved by following several basic steps.
Instructions
1. Turn off your computer and unplug any peripheral devices, such as monitors and keyboards.
2. Remove the side of your case by unscrewing the screws on the back of it.
3. Disconnect the power leads from the back of your power supply. The power leads should be a series of four-pin connectors branching off the back of your power supply.
4. Remove the screws securing your power supply to the cradle. There should be as many as three screws. Set them aside so you do not lose them.
5. Remove the power supply from your computer case.
6. Place your new power supply in its cradle and screw it in, securing it to your case.
7. Reconnect the power leads and replace the door of your case.
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