I recently put together my PC. When I went to turn it on, it would work for about 5 seconds, then shut down. It repeats that until I turn off the power supply. I've even tried taking the motherboard out of the case, and starting it up, to no avail. Any advice on what might be wrong?

 

Intel Core i5-4690K 3.5GHz Quad-Core Processor

Gigabyte GA-Z97X-UD3H-BK ATX LGA1150 Motherboard

G.Skill Ripjaws X Series 16GB (2 x 8GB) DDR3-1600 Memory

Samsung 840 EVO 120GB 2.5" Solid State Drive

Seagate Barracuda 2TB 3.5" 7200RPM Internal Hard Drive

Corsair CX 500W 80+ Bronze Certified Semi-Modular ATX Power Supply

 

Thanks.

Good.

 

 

 

From Tomshardware.com: 

 

"Unplug your Mobo from the power supply (the cable 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 cable 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-po...

 

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

 

"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."

 

 

Do you have a speaker connected to your motherboard? If not, do so as the beeping might reveal the issue. Also verify that all fans are spinning when you start.

My brother had a problem that sounds very similar, and it turned out to be a problem with his power supply. No idea why, but his laptop worked fine when he switched to a different one. It's a bit of a long shot, but it might be worth a try!

My brother had a problem that sounds very similar, and it turned out to be a problem with his power supply. No idea why, but his laptop worked fine when he switched to a different one. It's a bit of a long shot, but it might be worth a try!

Well this isn't a laptop. 

All the fans spin, and no beeping sounds. I have a feeling it might be a faulty motherboard, so I'm going to get a replacement. I'll let you know if it works.

 

Thanks for the help.