Question Computer fans run for a second then turn of and repeat...

[okystokey_pro]

Computer starts up with fans running on both the power supply and cpu fan.. the system does this then shuts down and repeats until I turn off at the power supply. New Ram, CPU, as well as a new power supply unsure of what it is assuming it something to do with motherboard as it wont even post.

Specs:
i5 760
8gb ddr3
320gb HDD
500w PSU
intel CPU fan

 

[Krotow]

Are you can see something on screen? Are there some other indications like motherboard beeps? Are there was working operating system on HDD before problem started?