Saturday, April 4, 2009

How to switch on an ATX power supply without a motherboard?

This is a much needed answer for the people who are dealing with computer hardware. It is always good to know how to turn on a power supply unit (PSU) without the help of a motherboard when it comes to troubleshooting.
It’s pretty simple. The following picture shows a 20pin ATX connector.

What you have to do is short circuit the 14th (Green) and 15th (Black) pins using a wire as follows.

In 24 pin connector you can short circuit the 16th (Green) and 17th (Black) pins to turn on.


  1. welcome to the blogsphere!

    nice article!!! hope many things will come in the future

  2. Simple and really useful one. I've many used ATX power supplies which can now be used to power my always-on circuits.
    you can visit my blog at

  3. @malshan I'm a regular visitor of your Malshan's Linux Blog

  4. Very good article. Easy to understand and my computer thanks you.

  5. I am glad on your nice article. I just got some nice information about ATX power supplies from your blog so thanks for sharing that information.
    power supply

  6. I wіll гight away clutch yоuг rss feеd as I can't in finding your email subscription link or e-newsletter service. Do you have any? Please allow me understand so that I may just subscribe. Thanks.
    Here is my web page : Spanish property sales