Cause of board shorting?

[tical2399]

Hey guys I'm trying to find out why my system won't stay powered on. Here's a little background. I'm building a new rig with some new parts and some carried over from my current machine. The new machine has an i5 3570 Asus p8b75-v mobo, 8 gigs gskill Ares ram housed in a factual design define xl r2.

Parts carried over are corsair 750 watt PSU, 60 gig corsair ssd and two WD 1 tb HDD. I put the machine together today and when I press power the fans spin for a fraction of a second and then stop.

Now before all the replies of "its a bad power supply" let me say this psu was working this morning on my old machine and it seems to keep the fans spinning when outside the case (took mobo out to see if its a short).

The green light on the mobo is on indicating that its getting power and it seems to run when not in the case but not when its in. Any ideas?

The standoffs are in places the mobo has holes and all are screwed in properly. The main board and CPU power are both plugged right so I'm at a loss. Help needed asap. Thanks

Edit/update it seems to be the screws that are causing the issue. I took out all the mobo screws just to see if it would stay on without having to completely take it from the case and it did. I unplugged and put in one screw just to see and it cut out. Removed the screw and it stayed on.

So it seems to be the screws but I got no idea how to fix the issue.

 

[Tradesman1]

What GPU? make sure DRAM is fully installed, may even want to try 1 stick at a time

 

[tical2399]

What GPU? make sure DRAM is fully installed, may even want to try 1 stick at a time

Its not the GPU or ram. Neither is installed. Its just the CPU and CPU fan. And case fans. As I stated its not a parts issue its a location issue. However after that it seems its a screw issue as the fans will keep spinning (which I want) but won't do it if screws are in mobo

 

[coastie65]

Usually in that case there are two things to check 1) the CPU and make sur it is properly installed and 2) the standoffs. I am assuming from what you said, that it POSTed when you tested it outside the case. You didn't really say, only that it "Seemed to run". If in fact it did POST outside of the case ( reached the ASUS splash Screen ) and is doing what you said inside the case, then I would recheck the Standoffs ( they should be the Brass or Steel ones and not the Nylon ones ). It is easy enough to rule out the PSU by trying another one if you have one.

 

[tical2399]

Usually in that case there are two things to check 1) the CPU and make sur it is properly installed and 2) the standoffs. I am assuming from what you said, that it POSTed when you tested it outside the case. You didn't really say, only that it "Seemed to run". If in fact it did POST outside of the case ( reached the ASUS splash Screen ) and is doing what you said inside the case, then I would recheck the Standoffs ( they should be the Brass or Steel ones and not the Nylon ones ). It is easy enough to rule out the PSU by trying another one if you have one.

Its not the power suply. As I said its the same one that I was using on my old rig until an hour ago. So I know its nothing wrong with that. The stand off are brass as they came with the case.

It didn't post (that was not my goal) because I had no ram installed
When I first did the build I had all parts installed and it cut out so I'm eliminating parts to see where the issue is.

Its seems that with or without GPU and with or without ram the board powers on and stays on (lights constantly on and fans constantly spin) when board is not screwed in the second you put one screw in it cuts out

 

[Deleted member 217926]

Here is our standard checklist. You may find it useful to follow it step by step.

http://www.tomshardware.com/forum/261145-31-perform-steps-posting-post-boot-video-problems

 

[tical2399]

I ignored that guide because I knew none of those things were the issue and sure enough I took the mobo out, hooked up cpu power, mobo, power, and gpu and sat them on the static free bag that the mobo came in on my desk, and sure enough the computer came on and posted. not only that I connected my ssd and it too me right windoes 8.1 install much to my surprise. CPUZ shows my 3570 with all 8 gigs of ram, GPUZ shows my 7870 running fine. so its not a hardware issue.

So at the moment im writing this response with my system outside the case sitting on a static free bag, so there is no need for further questions about "did you check the ram" "is the power plugged in" etc. Its obviously some kinda short when the system is in the case, so can anybody help me id where that might be coming from?

 

[coastie65]

Well, it comes back to the standoffs or possibly something with the case wiring to the Motherboard.

 

[tical2399]

Well, it comes back to the standoffs or possibly something with the case wiring to the Motherboard.

Yea it was the standoffs. I must have been tired or something when I was installing components because I had 7 standoffs installed when the mobo only has 6 holes.

I went to bed not knowing what it was, but when I got up this morning it just occurred to me to court the holes and standoffs and sure enough there was one too many. Rig is up and running and and I appreciate the help from all