PSU not powering on when ATX connected during breadboard tesf

[swampdonks]

I'm building a new comp and I have a problem somewhere between the PSU, MOBO, or CPU and I don't know what it is.

This is just a basic breadbox test with no other components connected besides what's listed below

Components: MSI Gaming 5 Z97 Mobo, Corsair 860i PSU, I7-4790k CP, 1 8G stick G Skill Trident 1600 RAM (1.5v),Standard Intel box cooler for test purposes.

The PSU self tests fine with just its AC cord installed, but when I connect the ATX connections to the mobo and PSU and turn the PSU switch on, no green light and it's not running.

I'm positive the connections are snugly fit on the mobo and PSU In the right positions.

I reseated the CPU to ensure it is installed correctly and even applied my own thermal paste (small amount) to make sure there is nothing excessive.

I switched between all 4 RAM slots with each RAM stick, no dice.

The outlet I'm on does not have a GFI and it tested fine with other electronics.

I don't have a speaker installed on the mobo unless the Gaming 5 already has one built in?

When I installed everything in the case before this test, my case power light would light up, but pressing it did nothing. I assumed a short somewhere so I removed everything to try this basic functionality test.


I'm stuck... What steps do I take now to isolate where my problem is? Thanks in advance

 

[ccampy]

By PSU switch are you talking about the one on the back of the PSU? If this is won't turn your PC you need to jump the power pins of the motherboard look up the power switch pins on your motherboard and join them with a mental objects

 

[i7Baby]

You got the CPU,cooler and ram attached?

You need to turn the case switch on - or short out the switch terminals on the motherboard.

 

[swampdonks]

Ok I connected the Power switch included on the I/O of my case. Clicked on. The mobo lights up, cpu fan spins and PSU clicks off. All in the span of less than a second. What does that tell me?

 

[swampdonks]

The code on the mobo also read 0 0 for what it's worth

 

[i7Baby]

I don't have the mobo manual. You do. What does 0 0 mean?

 

[swampdonks]

0 0 is unlisted

 

[i7Baby]

lol

Attach everything to the mobo including the PSU and short the power switch terminal to ground - pwr sw+ to pwr sw -. See your mobo manual for the pin out.

 

[swampdonks]

I've connected my included case I/Os but I don't have anything attaching a ground in that slot. There is a slot in JFP2 right next to my JFP1 slot that has a pin for a ground, yet I have nothing included in my case to make that connection.

 

[i7Baby]

People use a paper clip to momentarily short them out.

 

[swampdonks]

I did that with a paperclip too. Same result

 

[i7Baby]

Then either your mobo is faulty or your PSU is.

Remove the power supply connectors from the motherboard. Short out pwr-on (PS_ON) to ground (COM) on the 24 pin connector

See http://en.wikipedia.org/wiki/ATX for the pinout. Your mobo manual should also have the same.

 

[swampdonks]

Shorted them out. PSU stayed on. Looks like mobo is culprit then

 

[i7Baby]

RMA it.