How to Switch on a Computer PSU Outside the Case

A troubleshooting step to help determine why your PC does not switch on.

How to Switch on a Computer PSU Outside the Case
8 Steps
Supplies
Embed
1
Supplies 1x PSU 1x Paper clip

Supplies 1x PSU 1x Paper clip

2
This is the plug we will be working with. Notice the different colour wires? Take note of the GREEN one (just to the left of the middle) and the BLACK ones.  We will use the black one to the far right

This is the plug we will be working with. Notice the different colour wires? Take note of the GREEN one (just to the left of the middle) and the BLACK ones. We will use the black one to the far right

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3
Take your paper clip and bend it into a loose U shape.  If it is plastic coated remove about 1 inch of the coating from each end to expose the wire.

Take your paper clip and bend it into a loose U shape. If it is plastic coated remove about 1 inch of the coating from each end to expose the wire.

4
Plug you PSU into the mains with a 3-pin kettle lead and make sure the power switch (if there is one) is switched to the ON position.

Plug you PSU into the mains with a 3-pin kettle lead and make sure the power switch (if there is one) is switched to the ON position.

5
Insert one end of the paper clip into the bottom of the plug beneath the BLACK wire to the far right of the plug.

Insert one end of the paper clip into the bottom of the plug beneath the BLACK wire to the far right of the plug.

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Then insert the other end of the paper clip into the bottom of the plug beneath the GREEN wire.

Then insert the other end of the paper clip into the bottom of the plug beneath the GREEN wire.

7
Your PSU fan should now start spinning signifying that the PSU is working!

Your PSU fan should now start spinning signifying that the PSU is working!

8

Please be aware this guide is designed only to eliminate the PSU as the point of failure in a PC computer system when the computer does not power up.

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