System powers on for 1/2 second then turns off.

[JDawg1536]

I got a new case for my system and transferred all the parts today. Now when I push the power button, everything starts up like normal then immediately dies. I think Ive had this problem in the past but dont remember how I fixed it. Any ideas?

 

[RadiclDreamer]

Sounds like a grounding issue to me, are you sure that there arent any extra standoffs under the board where they arent needed?

 

[JDawg1536]

Im going to check right now. Could it be a grounding issue with the heatsink fan? I think I had that problem with this board a long time ago.

 

[RadiclDreamer]

The heatsink COULD be touching a cap and shorting things out, but its highly unlikely

 

[Allanv]

did you attach the 4 pin molex plug onto the motherboard?

 

[mugzy]

I had the same thing recently. Got the PSU checked and the 5v rail was dead. Take it to compusa or somewhere and get the PSU tested.

 

[RadiclDreamer]

Originally posted by: Allanv
did you attach the 4 pin molex plug onto the motherboard?

Another good suggestion, but usually when the 4 pin isnt connected the machine will not power at all, at least in my experience

 

[RebateMonger]

Originally posted by: RadiclDreamer
Another good suggestion, but usually when the 4 pin isnt connected the machine will not power at all, at least in my experience

When I forgot to attach the 4-pin cable on a recent C2D system, the power and fans came on for half a second, and then everything turned off.