Failure to boot

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Joined
27 Nov 2010
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7
ll right, I’m having problems with my PC (surprise surprise)
I bought a new case (NZXT Phantom) and motherboard (Gigabyte GA-890FXA-UD5) for my PC, and now it won’t boot. I press power, fans light up and whirr for about 1 second, then everything powers down. I then have to turn my PSU off fully and wait about 30 secs before I can actually try and turn it on again. The PSU is fine, the old paperclip trick works fine, its just when plugging things in it doesn’t work. I’ve tried reseating everything from cards to drives and cables, also tried starting without anything plugged in, trying to find the root by seeing which doesn’t boot, but that didn’t work as it didn’t even boot to begin. Occasionally, it will boot for more than a second, but it will not post and the GPU fan will spin at max speed for about 10secs, then the PC will power off again.
The power supply is a Be Quiet! DarkPower Pro 1000w, so its not exactly underpowered, and the motherboard is brand new, so that shouldn’t be the problem. I’ve had enough issues with Asus motherboards and thought that Gigabyte would be more stable, and I hope I’m not proved wrong.

I’ve also been through all the troubleshooting tips I can find across the web, so this is my last ditch attempt for finding out whats wrong, if you can offer any assistance it would be greatly appreciated.
 
Could be the motherboard is shorting out on the case, you could try building the pc out of the case to see if it works (do not put the motherboard on the anti-static bag when testing).
 
Sounds like it might be shorting, try building it outside the case first of all and see if you get any joy, if not you may of been really unlucky and got a DOA mobo (if everything was working beofe and this is all youve changed - bar psu which you tested)
 
Am currently breadboarding and its still not working. I don't even get to the stage when the speaker bleeps.
 
I've now tested with my old motherboard, and the same thing occurs, so I think it may be the PSU, i don't have a spare PSU to hand, so is there any advice you can give to troubleshoot further in the meantime?
 
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