power issue

[worthingsaxovtr]

just built a computer

turned it on it starts for about 2 seconds and dies

trid it again abou 5 times and nothing

then tried it again and it starts for about 2 seconds

tried different plugs, power cables etc

one thing I did notice is that even if the mains are turned on, but the machine is not working the power supply fan does spin

forgot to say its a brand new build, and it dies before the bios stage, so cant even get into that

the other times I have tried to get in, nothing not power lights zip zilch



could it be dodgy lead, or a dodgy power supply

I might have a spare power supply 350w I think, would it be okay to test this when the new one is 550w

 

[RJC]

Hi what spec have you got, obvious question you have all the right power connections plugged, ie 8 pin on the motherboard + the extra 4 pin next to the 20pin.

Also remove all components except Graphics, CPU and 1 stick of memory.

Board not shorting on the case!


Rob