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Properly jumping a PSU is no hard business. Many think it
hard to do, but it’s very simple in fact. One way I’ll show you will take no
soldering. The other way I’ll show you how to make a test PSU to test lights,
fans, and other things.
Jumping a PSU
To
jump a PSU it’s relatively simple, all you need is some wire or a paper clip.
First unplug and make sure the switch in the back of your PSU is off. Next find
your main motherboard connector, it’s the biggest one. Now find the green wire
(pin 14) to any black wire (ground). Now shove a wire in it and make sure its
in good. This picture shows what the plug looks like, and where the pins are.
Now plug in your PSU and flip the switch. But only have it
on for a second or two if it’s without load. You could blow up your PSU. That
is how to successfully jump your PSU.
Making a Good Looking Test PSU
This isn’t much different then jumping your PSU,
just some soldering and desoldering involved. First thing, you need an old PSU,
or one that you don’t mind voiding the warranty on. It doesn’t have to be a
400W PSU or anything. I used an old 300W I had, it’s plenty. Here it is:
Supply list:
- Wire strippers
- Soldering iron with soldering supplies
- Switch (optional)
- 8x LED (3V) (optional)
- Replacement fan (optional)
- Plexi/acrylic/lexan (optional)
- Dremel (optional)
- Cutting disk (optional)
Now the first thing you do once you have your
PSU is to take the cover off. Then unscrew the PCB from the PSU case. After
that sort all of your wires and put them into groups. Put all the molex’s to
the side since you need these, and the 12V, main motherboard connector, and the
old connector that no one uses. These are what they look like:
Now clip the plugs off of these so there are only wires.
Now with the main motherboard connector, find the green wire, grey wire, and
arrange the rest into groups. Now take the grey wire and a black one, cut them
short. Now solder them together. This helps the PSU when there little load on
it. It helps it from blowing up. Now take the green wire and a black wire and
either solder them together, or solder them with a switch. Now find all your
orange wires and desolder them. They aren’t needed really. The orange wires do
supply 3.3V of power though. So you can decide if you want to desolder them.
Now drill a hole for your switch and mount it.
Now that’s all you need for a test PSU, but if
you want a better looking one just keep reading. Now we get to replace the fan
with a lighted one and add LED’s. First take the fan that’s in the PSU and
desolder it. Take the fan you want and find a yellow and a black wire. Now
solder your fan to the yellow and black wire on the PSU. The yellow wire (PSU)
goes with the red wire on the fan, and black (PSU) and black from the fan go
together. The yellow wire on the fan isn’t needed here. Now this will make
your fan run at full speed. If you have a loud fan and don’t want it at full
speed, we can make it run at about half. To make it run slower find a yellow
and red wire from the PSU; then solder the yellow wire (PSU) with the red one on
the fan, and the red (PSU) one to the black wire on the fan. But making your
fan run slower will also dim the LED’s if you have a LED fan. Here’s my fan
running on 12V:
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