New build failing -- help

[jamesraby]

I am building 2 new pcs for my kids. So far - not so good.

These are the parts:

Motherboard: Asus Z97-A
CPU: Intel i5-4690K 3.5ghz
Case: Antec 900
Power Supply: Corsair CX600M
Memory: Crucial DDR3 8GB
Graphics card: gigabyte radeon r9 270X

Also have ssd drive, hard drive and cd/dvd rom drive

I built one system completely - but I can not get the motherboard to post. The power light comes on for the motherboard when I turn the power supply on. When I turn the computer on - the cpu fan goes on for 2 seconds and then turns off.

So - I for the second one - I decided to breadboard it. I just hooked up the power supply to the motherboard - with nothing on it (no cpu/memory) and the motherboard is outside the case - I get do not get anything. I get the power light on the mother board and that is it. I added the cpu and memory - and it does the same thing as my built system - the fan comes on for a second and then turns off. I reseated both the 24 pin and 8 pin power from the power supply 20+ times - no results. I took out the memory - just the cpu - same results. I bought a little speaker and hooked it to the motherboard - no beeps or anything. I reseated the cpu fan - same result. Took the cpu out to check for bent pins - did not see anything.

This site has some great guides - one of them a 25 point checklist for motherboards not posting - I went through it several times - no luck.

I must be doing something stupid as I get the same behavior for both systems. Been working on it for a week - and the kids are now disinterested!! Any advice would be greatfully accepted. Thanks

 

[vrumor]

Decent parts for sure, the CX series kinda sucks, compared to other Corsair PSUs. But the chances of 2 bad ones is highly unlikely. Might want to look into a BIOS update.

 

[jimthenagual]

So there are two completely different builds both failing on you? No shared parts? It would be extremely rare, as you already know, for two systems to fail in the exact same way. Chances are it is user error. Somehow. After all the troubleshooting you have done, I don't see anything else to suggest right now though. Breadboarding it with no post points to hardware problems....

Wish I could be more help, but I gotta say, great parenting! (seriously)

 

[jamesraby]

Well - turns out the problem was using long screws for mounting the power supply. Did not come across that issue. Unmounted the power supply and it worked. Mounted with short screws - it worked. Guess the long screws must have caused a short somewhere - I do not really know.

Thanks to the people that answered the question - every little bit helps