New Build Problem - Fans Spin, no POST

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HTPCBuild

Honorable
Jan 2, 2014
3
0
10,510
Ok, this is driving me crazy. Hopefully someone can shed some light here.

Components:
Intel i5 4670
Gigabyte H87N-WIFI
G.Skill Sniper Series RAM (2x4GB)
Corsair CX600M
Samsung EVO 120GB SSD
Fractal Design Node 304 Case
Hyper 212 Evo Heatsink/Fan or Stock Intel Heatsink/Fan

I got all the components for this build last week. Assembled in the case and got nothing - fans would start to spin momentarily and then stop and loop that behavior. I went through all the troubleshooting (including the guide on here) and everything was good. Took the mobo out of the case, reassembled, same behavior. Tested the PSU using the paperclip method, seemed to be working.

Figured better safe than sorry so I had replacements of both the mobo and the PSU shipped.

Received replacements today. Started with the new mobo and new PSU out of the case, assembled on cardboard. Used the stock Intel Heatsink/Fan and everything started up normally on the first try. Great. Went through and installed/configured Windows, etc. Now I figured it was time to get it in the case. Removed the stock Intel Heatsink/Fan and installed the Hyper 212 Evo and moved the mobo into the case. Went to fire it up before completely closing the case... no joy. Same behavior as before - fans spin momentarily, stop, then loop.

Took the mobo out of the case and back on to cardboard. Same behavior - fans spin momentarily then stop. Swapped coolers back to the Intel stock one and still got the momentary fan spin and stop. Again tried all troubleshooting - used the guide on this site, tried with one stick of RAM in either slot, etc.

Unfortunately, even though I have a 4 pin mini onboard speaker handy, this mobo doesn't have the pins for it so I can't hear POST beeps (if there are any).

I'm completely lost here on what the issue could be. The ONLY things that were different between the previous breadboard build that worked and the build that didn't was the cooler (Hyper 212 EVO vs Stock Intel) and the thermal paste used (Arctic Silver 5 on the 212 vs. generic Cooler Master compound on the Stock Intel).

Any thoughts? This is really testing my patience.

Thanks.
 
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Shaun o

Shaun o

Illustrious
Oct 7, 2007
6,113
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41,960
What is the likely connection here.

Well we presume you put the first board inside the case at first, and the fans started to spin for a second and the board powered down with no post.

So you got a new board and bread boarded it out side of the case with the psu connections fitted to the board, a memory stick, and the cpu. And it all worked fine.

It would suggest that you have a stand off on the board plate of the case in the wrong place.
And it is touching the back of the board causing a short and damaging the second board also.

Check you have all the stand off`s on the back plate of the case in the right place.

If you take the board out again and bread board it again and it works it will confirm a short on the back of the board is the cause. Due to a stand off placed wrongly for the holes to mount the board to the plate of the case. or a stand off

Trust me it`s such a simple thing.
And over the years I have seen this as the cause when a board works placed on cardboard, then put in a case does not work or boot.
So check the stand off`s line up with all the holes of the board.
And no extra ones are on the plate that may touch the back of the board where no holes are to pass a screw through or it will short the board.



 
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H

HTPCBuild

Honorable
Jan 2, 2014
3
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10,510
I thought that may be it but the stand offs are in the correct place on the board (all 4 align with the holes on the mobo).

Currently, I get the same behavior even with the mobo breadboarded outside the case (no standoffs present to short).
 
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munternet

munternet

Reputable
Mar 1, 2015
4
0
4,510
I have the exact same mother board and CPU doing the exact same thing although they had worked in this case previously. Can you let me know if you found a solution? I will post back if I find anything also. Cheers :)

Got it working.
I removed the wifi unit completely and that seemed to do it.
I also straightened a slightly bent pin in the cpu socket and did another bios clear but with the board and battery out, but I don't think they were the problem
I'm not going to put the wifi unit back in to verify as I don't want to risk damaging anything. I use wired lan anyway.
 
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H

HTPCBuild

Honorable
Jan 2, 2014
3
0
10,510
The problem with mine, best I could tell, ended up being that the Hyper 212 was contacting components on the underside of the mobo and shorting it out. After 3 or 4 mobo's, I went back to the stock heatsink that came with the i5 and everything worked properly and has ever since.
 
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munternet

munternet

Reputable
Mar 1, 2015
4
0
4,510
Hey, thanks for replying. I really didn't expect it after all this time.
Must have been frustrating for you.
I always wondered about removing the battery during motherboard installation also to stop shorts on the standoffs as it slides into the I/O plate.
Cheers
Chris
 
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