Question Why won't my new build turn on

[Philip575]

So I recently built a new computer but right as I turned it on nothing started. The fans didn't spin and the lights on the motherboard didn't turn on. I then realized smoke had been coming out of the 24 pin connecter on the motherboard so I turned it off. I didn't want to give up there so I decided to unplug everything from the motherboard to find the root of the problem. The only thing I left plugged into the motherboard was the cpu, cpu cooler, and the computer case pins. I then plugged in the 24 pin and 8 pin from the power supply and got the same result except fire came out of the 24 pin this time. I then plugged in my power supply to my old computer to see if the power supply works and everything ran fine.

 

[Rook_4]

seems like a bad mobo, maybe its shorting out.

 

[jsmithepa]

Something is shorted. I'd remove Mobo and visually inspect, specially near that pin 24, then attempt to "breadboard" boot it, that's all you can do. Did u make certain when mounting the CPU backplate, no pins were shorted?

Don't let it sit there. If no sign of life within 10 seconds, unplug it.

 

[drivinfast247]

A rogue motherboard standoff from the case short something out?

 

[AllanGH]

There seems to be a rash of fires, lately.

 

[Philip575]

There was an extra standoff I did not see touching the motherboard which is probably why it shorted out. I removed it and tried turning on the pc. It's showing signs of life but it displays nothing on my monitor and the cpu cooler isn't working either.

 

[Philip575]

I've been playing around with it for some time now. The motherboard RGB lights come on when I turn on my power supply but my fans do not turn on or light up. I've breadboarded it twice, tried every ram slot, tried disconnecting gpu, and I get the same result of only the motherboard rgb lights coming on. I've disconnected and reconnected the front panel connectors several times and have done everything I can think of. I'm not sure if I'm overlooking something or if my motherboard is just fried from short circuiting earlier.

 

[AllanGH]

This probably hints at a motherboard trace being cooked.