i need help.

[Christopher Kyojiro]

so i have build my own pc and im having ans issue. when i turn on the computer the leds and fans kick on the motherboard lights up and everything but it doesn't beep, doesn't go to post and after about 3 to 6 seconds it shuts itself down. what could be my issue here?

 

[Paul NZ]

What mobo and CPU did you get?