I need to get my powwer supply to turn on without my motherboard.

There must be a problem with your power switch on your computer casing, or motherboard or power supply.

Detach your power supply and try this, to check if your power supply really works. If the auxiliary fan will turn, your power supply is good
Testing your power supply and motherboard as seen on photo
If the cpu cooling fan and power supply did not turn the fan, but you have checked already the power supply that is working then you can conclude that your motherboard is need to be replace. But the power supply and motherboard and working, meaning to say your computer casing need to be replace or try fixing the contact of the switches attach to your casing.

Have a good day.

The power mapping grid on the motherboard may be defective

Bad Power Supply. Weak voltage power rail.

[There are three main power rails in the SMPS for your desktop computer.
A) The 3.3 Volt power rail
B) The 5 Volt power rail
C) The 12 Volt power rail ]

1) ALL of the LED lights on at once use less than 1 Watt of power.

2) EACH fan uses 2 to 3 Watts of power.

3) A typical Processor can use 51 to 125 Watts of power.
Just depends on what Processor it.

Remove the Processor, and you will have power to light LED lights, and spin fans.
Of course without a Processor operating, you have No computer.

Replace the Power Supply.

Do you have a KNOWN to be good, Compatible power supply available to use for a test unit?

Need guidance in replacing, or suggestions for Power Supply's to choose from, post In a Comment.

Regards,
joecoolvette

Failure of motherboards/processors due to thermal errors is usually due to breaking capacitors or overheated cases. In places with heavy dust build up this can cause components to fail due to heat issues. A few years ago a capacitor company stole the "recipe" for making capacitors from another company and tried to make their own, unfortunately they did not get the ingredients right and the capacitors started breaking after 2-3 years of use. They sold these capacitors at very cheap prices and a lot of computer companies and power supply makers bought them. This is easy to diagnose. Look for capacitors (caps) (they look like little tiny soda cans) on your motherboard (mobo). They should be perfectly flat on top and not bulged or swelling or leaking anything. There are a few companies that will repair broken capacitor issues. Hope this explains why they can fail. They can also fail if overheated (like when a case cooling fan fails), the cpu is overclocked and not cooled down (which raises temps), the power supply fails or by lightning and power surges. Also if you add a bunch of extra components without upgrading the power supply you can suffer underpowered situations and a thermal error. Most processor fans are held on with clips or screws. I don't have experienc with your particular model, but look at the heat sink that is on top of the processor and look for either clips or screws. Also be aware that if you seperate the heat sink from the processor you will need to re-apply some thermal heat transfer compound. You could also try using compressed air on the fan to try to remove debris build up. Just make sure you do it on a cold computer (one that has not been running) as the spray will get cold and when you mix hot and cold together it usually doesn't work very good.

Is power supply set for 115 volts?
Is power supply compatable to motherboard voltage input?

Changed the power supply and Power On switch?
New parts? Okay. We'll come back to them. For now, lets look over some simple things.

I can tell you that even after 20+ years as a tech, I still get a little zealous, when it comes to building computers. Sometimes we get into a rush, and overlook the simple things.
1.Are you sure the 20/24-pin motherboard power cable, is in tight, and down in there?

2.Are you sure the Front Panel connector, is connected right on the motherboard? Some Front Panel's have individual wires with terminal ends, that go on separate pins on the motherboard Front Panel header.
I'm asking are you sure the Power On switch is connected to the right pins, on the motherboard Front Panel header.

Everything good so far? Okay, lets look at the motherboard.
Look at the Electrolytic Capacitors on the motherboard. Specifically the ones that surround the processor. See if they show obvious signs of being bad.
Here is a link that will show you what Electrolytic Capacitors look like, and the visual signs of failure of them,
http://www.capacitorlab.com/visible-failures/index.htm

Good so far? Okay, lets check out that power supply, and at the same time, check out the Power On switch. Even if these items are brand new, they can still be bad.

I need you to make a jumper wire. This is to jump the Soft Power On, part of the power supply.
Wire needs to be like the power supply connector wires. That thick. It needs to have insulation on it. Should be 3 inches long, and have about 3/4th's of an inch of insulation, removed from each end.
Twist the ends tight, and into a pointed shape. Bend the wire into a U shape.

The 20/24-pin motherboard power cable, needs to be plugged into the motherboard. Where the wires go into the connector, there are socket holes. For every wire going down in there, there is a metal terminal end, on the end of each wire. The metal terminal end is pretty far down in there. Your jumper wire must go down in the socket hole, with the wire that is in the socket hole now.

You will see a Green wire, and a bunch of Black wires. The Green wire is the Soft Power On wire.
ANY Black wire is a Ground wire.
You want to jump across the Green wire, to ANY Black wire. (You can use the Black wire that is next to the Green wire. Just wanted you to know that you could use ANY Black wire you see)

Computer plugged into power. You may want to wear a glove on the hand that plugs the jumper wire in. The reason is that there will be a spark.
Not a big one, but I want you to feel safe.
Just stick one end of the jumper wire, down in the Green wire socket hole. Make sure it's deep enough to touch that metal terminal end. Now since the jumper wire is a U shape, just stick the other end in the Black wire socket hole.

You only want to touch it momentarily. Around 1 to 2 seconds. Then remove it.

If the power supply comes on, you have a bad Power On switch, or bad Front Panel header on the motherboard. If the power supply doesn't come on, you have a bad power supply.

With the power supply running, you can see if your motherboard is bad or not. I have seen VERY FEW motherboards, that have a bad Front Panel header. (Header is a -> Connector <- when referring to the motherboard)

If you computer over heated, this could have caused the board or power supply to short. I would first start by trying a new power supply unit (since this is cheapest of the options). If that does not work then try replacing the motherboard and/or processor. Since you not getting any power, my guess is motherboard or power supply unit.

what size power supply are you using, if its under 400 watts it may just be under powered. Large video cards 512mb and over take a lot of power. Try removing the video card and see if you can get the pc to power up, hopefully you have on board video.

How did you blow the cpu_fan connector, did you short it out? I would first supect the power supply is under rated, second a blown power supply, or mother board.

try checking the cpu fan and heatsink for dust build up

it must be ultimately wron in which u connected ur motherboard with the powersupply...