Just built new PC. Turns on for about 10 seconds, no post, and turns off. Then repeats.

Sour_cB

Reputable
Dec 26, 2014
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4,530
I just built a new PC, because my old one had died a couple days ago. When I finished my build and tried to boot it up for the first time, the lights on my PSU turned on, same with the motherboard and graphics card, and all of the fanse in the system began to spin. After about 10 seconds of the computer seeming to be fine, it turns off without reaching post, and then turns on again and does the same thing.

Specs:
i7 6700
gtx 970
"Gigabyte LGA1151 Intel Z170 ATX DDR4 Motherboards GA-Z170X-Gaming 3"
"Kingston Technology HyperX FURY Black 16 GB Kit CL15 DIMM DDR4 2400 MT/s Internal Memory (HX424C15FB2K2/16)"
 
Solution
Check to make sure your RAM is properly seated. Do this by removing all but 1 stick and make sure that stick is in the far left slot (A1 slot). If it turns on then add the rest and test again. If even with just 1 stick it still wont turn on, remove the graphics card and try again.

Pretty much the trick here is to isolate what is not connected properly by stripping it back down and testing along the way.
 


To my knowledge, it is nothing in that list. My power supply is from my old computer and so is my GPU; So I know that they both work fine. That leaves the mobo, cpu, and ram. When I installed my mobo into my case, not all of the standoffs lined up correctly, so I removed them. Not every standoff hole in the mobo has a standoff in it now, but I cant imagine this being a problem. The back of the motherboard is not touching the case anywhere.
 
So you checked every cable connection in that list and re-seated your ram/pci-e cards?
Or did you just skim through it and go nope, all of that is good! (what clarkjd said not to do).

If your motherboard is missing a stand-off or two it is not the end of the world as long as the board is secure and not going to ground out to the case, if it is grounding out to the case that is a problem (potentially a very expensive problem)
 


Just curious, how did you know that the PSU wasn't the cause ur old PC died? Also what PSU is it? Did you try taking out gup and try booting up with the integrated graphics instead?
 

You have to work with us here. We can neither see nor touch your machine. Each step in the list provides us with valuable information that can help us diagnose your issue. If you don't give us that information, then we are just shooting in the dark and guessing. In that case, we can only help you by accident.

 


My old PC died because I had a beep code on my motherboard indicating a damaged bios. The PC ran fine, but i couldnt access the bios. Just recently my C drive failed and because I couldnt access the bios, I scraped the PC and built a new one.
 


I did extensively review that list and am very appreciative of it. All of my motherboard power connectors are fine. I have not yet tried testing the ram, or fixing the standoff problem I stated before. If I had to guess, I damaged the traces on the underside of my motherboard when I was trying to align the standoffs. That, or, the board is actually touching my case somewhere.
 

Now you have both of us guessing, instead of working with hard data. We will get this PC working in no time!
In order to help you, we need to know what IS, not what you think, or guess.

 
Lets start over because I think there was somehow a misunderstanding. Brand new computer build turns on for about 10 seconds, then turns off, and repeats. All of the parts are brand new except for the PSU and the GPU. We know that those 2 components work fine. That leaves the motherboard, CPU, and RAM. We know that not every standoff is installed in the case, but believe that this is not a problem. I tried re-seating the ram, and it did appear that one stick was not seated properly. After re-seating both dims, the problem still occurred. All power connectors are connected properly, and everything fully turns on before it shuts off. I apologize for any misunderstandings before.
 

Are you getting any beep codes?

 


Actually, I solved the issue. I went took my motherboard out of the case and installed my old motherboard speaker and was getting a RAM error, even after I re-installed it. So, I installed it again making sure it was seated properly for the third time, and it booted right up and installed windows.
 

I am glad that you finally got it working.
Now you see why I wanted to know if you had actually performed all of the steps in the list? Some times the beep codes are the only way to find what is wrong! We can only give a good diagnosis when we have ALL the facts!

 
Solution