CPU LED lights up and no POST

[Mikeyboy1107]

Hi,
I'm rebuilding my computer using the following:
Intel i5-2500k
Sabertooth p67
850w Power
Hyper 2gb DDR3 1600mhz (have 8gb but using 1 stick to start)
HD 6770 Graphics card

All the parts are installed as instructed and as usual, i have built a computer before.

When powering up the CPU LED lights up instantly and the Motherboard does not proceed to POST.

I have breadboarded the board and the same issue so I don't think its a short.
I have swapped out the RAM to make sure its not a bad stick
I have checked the power.
I have even replaced the motherboard and CPU for another and yet the same issue comes up.

What am I doing wrong?

 

[inzone]

Are you saying that even with a different cpu and motherboard you have the same issue ? Are you connecting the cpu power cable , the 4 or 8 pin connector to the left of the cpu socket ? If you have , then have you tried a different power supply , that seems to be the one thing that you did not list as doing.

 

[Mikeyboy1107]

I'm coming to the conclusion that that is the problem. The pwer supply.
Because as you say I have bought a new CPU and board and the problem came up again. I have connected the 8pins to the CPU power supply but I think that the issue is not enough voltage is getting through.
Is there a way to check this without buying a new PSU?