Problem with Mobo 12V connector

[loyolacub68]

Hey guys, thanks in advance for any help, this is my first build.

I have the following:

ECS nforce 570 SLIT-A mobo
P4 D 940 3.2 Ghz
Ultra X-finity 600w psu
Western Digital 250GB HD
2 x 1 GB OCZ DDR2 667 Mhz
XFX 7600GT XXX PCI-e video card

When I put everything in the case and connect all the power and hit the button....nothing. Nothing turns on. I think I hear it click the first time I try but then nothing when I try after that.

Now, when I disconnect the 4 pin 12V connection on the motherboard, the thing fires right up, all the fans are going and I can hear the hard drive spinning and everything. But I do not get any video or any beeps of any kind.

When I try to hook the 12V back up it does the same thing, and when I unplug that connection again it wont start back up immediately, I have to unplug the PSU and wait a few seconds, then plug it back in without the 12V connection and it fires up, but still with no video or beeps.

Does this sound like I am shorting out on the case? If so, how to I go about fixing this? Should I be getting some kind of video when the thing fires up even without the 12V connection plugged in?

[glc]

http://forum.pcmech.com/showthread.php?t=132409

[loyolacub68]

I'll give this a try, it does sound like it is shorting out but what do I do if thats the case? Also, would you expect no video without the 4-pin 12V connector in place?

[loyolacub68]

I did exactly what was explained in that thread and it is still doing the same thing, any other ideas?

[loyolacub68]

By the way, my PSU does not have a 4 pin connector for the Mobo, it has two 12V 6 pin connectors and two of the prongs are just overlapping. Is this a problem perhaps?

[flanzig1]

For the motherboard to work you need the 24 pin connector AND a 4 pin CPU connector to the motherboard. That PSU should have the correct connections.
This should be your PSU: http://www.tigerdirect.com/applicati...309&CatId=1483
You need the first and third connector to the mobo.

[loyolacub68]

Thats the same PSU I picked up from TigerDirect, but the connections on that unit are different than the one I actually received. Instead of a 4 pin connector it had two 6 pin 12V connectors. I just got fed up with TigerDirect and returned the Ultra PSU and the ECS board. I picked up and MSI P6N and a 600W Hiper PSU.

From what I've read these are marked improvements over the ECS and Ultra equipment. Thanks for your help, hopefully when I get everything together this time it will post.