DIY Computer Repair: How to Replace Your PC Power Supply

There's nothing like the horror of pushing your computer's power button and getting no response. You try it again but nothing happens. Your mind races through all of the files that will be lost when your computer is pronounced dead. Panic starts to creep its way up your spine. It's time you finally admit it - you need a new Power Supply. But don't worry, most Power Supplies in off-the-shelf desktop PCs are actually quick and inexpensive to replace. We were able to replace our Power Supply in less than fifteen minutes and it only cost us $15.00.

To replace your PC's Power Supply follow these simple steps:

1. First test to see that you aren't experiencing problems with your electrical outlets. Try plugging your computer into different outlets throughout your house. If your computer still doesn't power up then it's most likely a Power Supply failure.

2. After diagnosing the problem, you need to determine which Power Supply to purchase. Unplug the computer and open up the case by removing any screws. Now locate the power supply. The Power Supply is the large metal box mounted in your computer where your AC power cord plugs into. Find the label on your Power Supply and write down the wattage. Your new Power Supply should meet and preferably exceed your current wattage.

3. Bring information about your computer and your current Power Supply to a computer store. Ask a store employee for assistance to help you choose a Power Supply that will meet the demands of your computer. There is a wide range of prices, features and wattage available. We paid only $15.00 for our new 500 watt Power Supply. If you have a graphics card you will need a Power Supply with a higher wattage. Contact the manufacturer of your graphics card to find out the card's specific requirements for power.

4. When you are back to your computer, lay the computer on its side to have easier access. Remove the old Power Supply by unscrewing the screws from the mounting holes. Set the Power Supply to the side without disconnecting the power supply cables or connectors.

5. Next slide the new Power Supply into the case so that the mounting holes align up with the screw holes in the case. Secure the new Power Supply into your computer using the screws.

6. One by one, carefully remove each connector from the old Power Supply and replace it with the same connector from the new Power Supply. This method will ensure that your motherboard and all of your peripherals get hooked up properly to the new Power Supply. Each connector is keyed so you don't have to worry about plugging it in incorrectly.

7. Once all of the connectors are seated properly, replace the cover to your computer case with the screws.

8. Plug in the AC power cord to the computer and the wall outlet. Turn on the power and you should be good to go. Be sure to back up all those files that you were stressing about losing if your computer had actually died.