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How to tell if your desktop computer power supply has failed

There may be a time when your desktop computer does not start. There could be a few reasons why it does not start. The first thing that comes to mind is a failed power supply. Here's how to test your desktop power supply.

How to tell if your desktop computer power supply has failed

Living in Phoenix, we have one thing that takes a toll on a desktop computer. No, it is not the heat; it is the dust. Since our environment here is so dry, we get a lot of dust.

How to clean the dust out of your computer

And since dust does conduct electricity, power supplies tend to fail. Even if you routinely clean your desktop computer, they still only have a life span of around 3 to 5 years.

So, if you press the power button, your desktop computer does not start, and there are no lights that light up, then you may have a failed power supply.

Now, if you do not feel comfortable working around electricity or inside of your desktop computer, please contact a local computer technician.

How to test your desktop computer power supply

  1. Disconnect the power cord that comes from the outlet to the power supply.
  2. After you have disconnected the power cord, open up the case and touch any metal part of the power supply or case to discharge any remaining energy.
  3. Make a note or take pictures of the connections that lead from the power supply to the devices. Once you have documented all of the power leads, then remove all of the connectors (SATA, Molex, PCI-e, ATX, MB, etc.) that lead to all of the different devices and motherboard.
  4. Create a jumper from a piece of thin gauge wire or paper clip.
  5. Plug the power cord back into the jack on the back of the power supply.
  6. Using the jumper you created, connect Pin 16 to either Pin 17 or Pin 18.
    Motherboard power supply connectior
    If the power supply fan starts to run, the power supply has an output voltage and is in good condition. If the power supply fan does not spin, it is time to replace it.

If your power supply has failed, make a note of what type and how many connectors your existing power supply has.
Common desktop power supply connections
Also, check the stated output of your existing power supply from the label on the side.

I also recommend that you use a tape measure or ruler to measure the dimensions of the power supply, (Width x Height x Depth) as you will want to get as close as possible to these for the replacement power supply.

Customer service is #1

Here at Geeks in Phoenix, we take pride in providing excellent customer service. We aim to give the highest quality of service  from computer repair, virus removal, and data recovery.

Bring your computer to us and save

Diagnosing PC problems can be time-consuming. From running memory checking software to scanning for viruses, these are processes can take some time. We base our in-shop service on the actual time we work on your computer, not the time it takes your computer to work!

Contact us

Geeks in Phoenix
Professional service at an affordable price!
4722 East Monte Vista Road
Phoenix, Arizona 85008
(602) 795-1111

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Geeks in Phoenix is an IT consulting company specializing in servicing laptop and desktop computers. Since 2008, our expert and knowledgeable technicians have provided excellent computer repair, virus removal, data recovery, photo manipulation, and website support to the greater Phoenix metro area.

At Geeks in Phoenix, we have the most outstanding computer consultants that provide the highest exceptional service in Phoenix, Paradise Valley, Scottsdale, and Tempe, Arizona. We offer in-shop, on-site, and remote (with stable Internet connection) computer support and services.

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