Install the Power Supply

Last Updated on Sun, 19 Feb 2023 | Operating Systems

A technician may be required to replace or install a power supply, as shown in Figure 3-1. Most power supplies can fit only one way in the computer case. Usually, three or four screws attach the power supply to the case. Power supplies have fans that can vibrate and loosen screws that are not secured. When installing a power supply, make sure that all the screws are used and that they are properly tightened.

These are the power supply installation steps:

How To H Step 1. Insert the power supply into the case.

Step 2. Align the holes in the power supply with the holes in the case.

Step 3.

Secure the power supply to the case using the proper screws.

Figure 3-1 Power Supply

Virtual Desktop Activity: Power Supply

Complete the power supply layer in the Virtual Desktop. Refer to the Virtual Desktop software on the CD that comes with this book.

Lab 3.2.0: Install the Power Supply

In this lab you install the power supply in the computer. Refer to the lab in IT Essentials:

PC Hardware and Software Labs and Study Guide, Third Edition. You may perform this lab now or wait until the end of the chapter.

Continue reading here: Install a CPU and a Heat Sink Fan Assembly

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Readers' Questions

  • anna
    How to change power supply in desktop?
    2 months ago
    1. First, turn off the computer system and unplug all power cords from the back of the computer.
    2. Open the computer case and locate the power supply.
    3. Disconnect all of the cables connected to the old power supply. This includes power cables, SATA cables, PCI Express cables, and other cables connected to audio and USB ports.
    4. Unscrew the power supply from the case.
    5. Insert the new power supply and reconnect all of the cables.
    6. Close the computer case, plug in the power cables, and power on the system.
    7. Test the new power supply to ensure everything is working properly.
    • ambrosia
      How to install a power supply in a desktop?
      2 months ago
      1. Unplug all cables from the back of the desktop computer and ensure that the power switch on the back of the case is off.
      2. Remove the power supply unit from its box and locate the four screws that hold the power supply in place. Remove the screws and set them aside.
      3. Slide the power supply into the case, ensuring that the fan side of the unit is facing towards the back of the case and the output connectors are facing outwards.
      4. Replace the screws to secure the power supply in place.
      5. Reconnect all cables, including the main power cable, to the back of the desktop.
      6. Turn the power switch in the back of the case on.
      7. Switch on the desktop computer and ensure that the power supply is functioning correctly.
      • Falco
        How to replace power supply in desktop?
        2 months ago
        1. Turn off the computer and unplug all cables from the rear of the case.
        2. Set the power switch on the back of the case to the off position.
        3. Remove the screws on the back of the case that hold the power supply in place.
        4. Gently pull the power supply out of the case.
        5. Install the new power supply in the same location as the old one.
        6. Replace the screws that hold the power supply in place.
        7. Connect all of the cables to their appropriate locations on the rear of the case.
        8. Reconnect the power cable to the new power supply.
        9. Turn the power switch on the back of the case to the on position.
        10. Finally, turn the computer on and enjoy your new power supply!
        • ilta
          How to install power supply pc?
          2 months ago
          1. Unplug the power supply from the wall outlet.
          2. Unscrew the four screws on the back of the case that hold the power supply in place.
          3. Slide the old power supply out of the case.
          4. Insert the new power supply, making sure the screw holes line up properly. Secure the power supply with the four screws.
          5. Connect the power supply to the motherboard. This will require connecting several cables, including the power switch, the power LED and data cable, the main power connector, and the peripheral power connectors.
          6. Reconnect the power supply to the wall outlet.
          7. Turn the computer on and check the new power supply to make sure it is functioning correctly.