Gigabyte GAMA69VM S2 motherboard powers down

[Guest]

I have a 500w psu, the above board, 2 x ddr667 2gb and an Athlon x2 2.7ghz.
I switch it on, it posts, lets me into the bios and within 1 minute switches off.
It then switches off almost as soon as I try again.
If I leave it 10 mins I get the same results

Any ideas?

 

[nikorr]

Post all the specs...

It could be a PSU or the RAM or mobo or CPU.

Do u have another PSU to try?