Installing a Replacement Power Supply on a Desktop

Knowledge Base / Hardware / Installing a Replacement Power Supply on a Desktop
Created: by Tony Baumann // Last Modified: by mgandhi

Many times PCs that are continuously left on may receive numerous power surges that may cause a power supply to fail. Installing a power supply is not a difficult task as it may seem. If you follow these simple steps, you can replace the power supply unit in no time and with little effort. It is also important to note that computer power supplies store power even when unplugged. Caution: Never open the case of the power supply.

  1. Gather the tools needed to replace the power supply. Namely, you will need a Phillips screwdriver, wire cutters and possibly a knife.
  2. After you get all the tools together, turn the computer off and unplug the power cable from both the wall and the back of the power supply. Now remove the side panel from the computer.
  3. Start removing the power connectors from the motherboard, hard drive, and optical drives. Sometimes, connectors can be stubborn to remove, so be careful when removing them to prevent damaging the computer.
  4. Once the power connectors are disconnected, remove the four screws that are securing the power supply to the case and remove the unit from the computer. If you find that any of the cables are secured to the PC case with wire ties, use the wire cutters to remove them.
  5. Now place the new power supply in the computer where the old one was. Take the screws that you previously removed and screw them into the unit. Also, reconnect the power cables from the power supply to the hard drive, optical drive, and motherboard.

Once the drives are reconnected, you can connect the power cable to the wall from the power supply and turn the unit on. If the unit powers up and goes to the Windows screen, then you have successfully installed the power supply.


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