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New build turns on for 1 second and off repeatedly

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April 25, 2014 1:41:05 AM

Case: Corsair 400R
Motherboard: GIGABYTE G1.Sniper B5 LGA 1150
CPU: Intel Core i5-4670
GPU: GeForce GTX 760
PSU: Rosewill HIVE-750
RAM: G.SKILL Ripjaws X Series 8GB (2x4GB) 240-Pin DDR3 SDRAM 2133 (PC3 17000)
HDD: Seagate Barracuda ST1000DM003 1TB 7200 RPM 64MB Cache
CPU Cooler: Cooler Master Hyper 212 EVO

Hi. I just ordered all the parts above and tried putting them all together. When I tried to boot, the PC turns on for a second and turns back off. Then it repeats the cycle continuously. All the fans turn on.

Here is what I have tried so far:....
1. Used old PSU from a working computer. The same on and off thing happens.
2. Used old GPU (GTX 560ti). Same on and off thing happens.
3. Put new GPU in an old working PC. Starts up fine.
4. Put new PSU in an old working PC. Starts up fine.
5. Tried only 1 stick of ram. Same thing
6. Tried reapplying thermal paste to cpu and reseated heatsink. Same thing
* So I am thinking PSU and GPU is fine. RAM is probably fine. The problem is in the MOBO or CPU?

Some questions:...
1. Can incorrectly applying thermal paste effect the boot? The first time I removed the heatsink to reapply paste I noticed that I probably put too much. Some of the paste oozed out over the side of the CPU. The second time I probably did not get paste evenly spread over the CPU.
2. The case came with standoffs preinstalled, but the material is not the usual material for standoffs. Will I need to remove the extra ones that are not helping the MOBO? They dont look like they can be easily removed. Also there is a spot under one of the holes in the MOBO where a standoff should go, but there is no slot on the case for a standoff.
3. My MOBO has an 8pin connector near the CPU. The PSU comes with both an 8pin and a 2 4pin connector. I tried both. Should either work?
4. The GPU needs a 6pin and a 8pin from PSU. The PSU has 4 outputs to the PCI-e. 2 are 6-pin and the other 2 are 8-pin. Two Cables were 6-pin one end with 6+2-pin on the other end. The other two cables were 8-pin on one end and 6+2-pin on the other end. I am currently using 8-pin to 6+2-pin and 6-pin to 6+2pin (but the 2pin part no plugged in). Is this correct?
5. Can I boot without harddrives attached?
6. Can I boot without a GPU attached?

Any help would be appreciated. I can also post pictures or videos if it helps.

More about : build turns repeatedly

April 25, 2014 2:53:24 AM

1. No
2. You may have shorted out the board by not removing it. If your lucky your fine but still remove all excess standoffs!
3. Yes 4 Pin is fine unless the CPU is drawing too much power (E.G. Overclocked I7 4770K)
4. Sounds ok
5. Yes
6. Since your board has integrated graphics, yes

A short video of what happens and the inside of the PC would be great (try to make sure it is well lit)
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April 25, 2014 8:20:02 AM

ganon11000 said:
1. No
2. You may have shorted out the board by not removing it. If your lucky your fine but still remove all excess standoffs!
3. Yes 4 Pin is fine unless the CPU is drawing too much power (E.G. Overclocked I7 4770K)
4. Sounds ok
5. Yes
6. Since your board has integrated graphics, yes

A short video of what happens and the inside of the PC would be great (try to make sure it is well lit)


Thanks for the reply. I will first remove the extra standoffs before i take a video.
Oh I didn't realize my board had integrated video. Just noticed the hdmi port. Good to know!

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April 25, 2014 9:23:01 AM

I removed the 2 extra standoffs but it still did not work. Here is a picture from the other side of the case. http://i.imgur.com/QTPh1FW.jpg
The 6 green circles are where I screwed in the mobo.
The 2 red circles are where I just removed the 2 extra standoffs.
The 2 yellow circles in the middle is where there are no standoffs and there are no holes in the mobo in those spots
The top white circle is a raised bump in the case with no screw in it. The 3 top spots on the case are actually raised bumps.
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April 25, 2014 9:31:32 AM

http://youtu.be/fB_CGGiDlNQ
I took a video, but my phone is really not that great at it. The slam noise in the beginning is from outside so you can ignore that. But you can hear the whirring startup noise and it then immediately shutting off. The green fan in the back lights up. The cpu fan starts up. The front fans don't turn on anymore because I just realized I unhooked them.
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April 25, 2014 10:58:33 AM

http://youtu.be/MBijegG-sbw
Another video I took. This time I took the mobo out of the case and tried booting. Same thing is happening. So I really feel as though I should replace the motherboard.
I also tried taking out the cmos battery and putting it back in.
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April 26, 2014 2:29:35 AM

What happens when you boot without the RAM installed?
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April 26, 2014 10:00:35 AM

I didn't try that, but I found out that I had bent pins on the motherboard socket. It was my fault most likely. And Newegg won't let me return it T.T
I bought a new one and it works fine now. Thanks for the help though
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Best solution

April 26, 2014 12:20:12 PM

eobboe said:
I didn't try that, but I found out that I had bent pins on the motherboard socket. It was my fault most likely. And Newegg won't let me return it T.T
I bought a new one and it works fine now. Thanks for the help though


Try this on the old board then sell it on eBay (even if you messed up) https://www.youtube.com/watch?v=mhOYEQ65a94
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