New PC Build, Powers on then off

[threesands]

Recently I just built my very first PC and I am running into some issues. When I flip the power switch, the case lights on and the case fans and cpu fan spin very briefly then immediately shuts off and doesn't even get to POST. I think it might be some sort of power short, so I double-checked every single connection and stripped it down to the very basics and still is causing the same issue. I didn't notice any loose screws around but something caught me as odd with the PSU. The main 24 Pin connector doesn't seem to click into place at all and sometimes feels very loose. I noticed it looks like it's missing one of the pin connectors, but I wasn't sure if that was manufacturer intended or not.

http://i.imgur.com/6fZypTK.jpg

(apologies for awful cellcamera quality)

Any ideas?

Parts:

GPU: PowerColor 7850 2GB
CPU: AMD Phenom II X4 970
PSU: CORSAIR CX500M 500W ATX12V v2.3 SLI
RAM: Kingston HyperX 8GB
Motherboard: ASRock M3A770DE AM3 AMD 770 ATX AMD

 

[ingtar33]

can't see anything with that picture.

 

[Spinny99]

Unplug your Mobo from the power supply (the cabble that goes from the psu to power the mobo). Then, take a paper clip and bend it into a "V" shape. Put one end of the V in on the cabble that connects your PSU and Mobo, where the GREEN wire is, and the other end where a BLACK wire is. There is usually more than of each. This should fake the PSU into thinking there is a motherboard connected, which is good for testing your issue. Here is a better explanation.

http://www.overclock.net/t/96712/how-to-jump-start-a-power-supply-psu-test-a-power-supply-and-components

Tell me how it goes, and if your fans stay on for more than a minute.

 

[ingtar33]

your problems smell like a cpu/motherboard or psu issue. generally if the gpu is broken the system will either power on and give no screen, or simply won't start at all. a short probably won't do what you're seeing either. Ram issues will give you warning beeps. That leaves the cpu/motherboard or psu as the main likely culprits.

do as spinny suggested, that will almost rule the psu out of the equation.

if the psu works fine, and another psu doesn't fix the problem (try another psu just to make sure), then it's probably the cpu or motherboard. CPUs rarely break, or leave the factory broken, which means the most likely culprit would be the motherboard. take the cpu out, and examine the pins VERY carefully, see if any are bent. make sure they're not damaged, then put the cpu back into the motherboard, make sure it's placed in correctly. clr_cmos, put the cpu cooler back on, plug everything in and pull out all but 1 stick of ram. removed the gpu, use the io ports on the back of the board for your video out. turn it back on, and see what happens.

 

[threesands]

Sorry for the late reply, just tried out the method of jump-starting it today. Results are the exact same thing, the PSU turning on then off very briefly. Now I believe I have an idea of where to go from here, thank you very much for your help!

 

[ingtar33]

yeah... dead psu. 🙁 well corsair's warranty and customer service are top notch.

 

[Spinny99]

That is true. I'm sure you'll be able to RMA. Glad my method worked! *Always Does xD*

If you have any other questions feel free to ask 😀