Display out

Hi

I've bought a new CPU. But, its display goes off after some time (<1 min) its switched on. That is only black screen. But, I am able to switch the system off, pressing power button. I mean the system is not going stuck. Even after entering bios,this happens. The system is running at its default bios configurations. My hardware configuration is...


SMPS : Zebronics 700W SMPS
[url=http://www.zebronics.net/popup.asp?file=images/power/platinum/Zeb700W_b.jpg&height=430&> width=330&desc=Gaming%20and%20High%20End%20Computer%20Cases&d=ZEB%20400W%20SATA][/url]

Processor : Intel Core2Quad Q8200 @ 2.33Ghz
[url=http://processorfinder.intel.com/details.aspx?sSpec=SLB5M][/url]

Motherboard : Gigabyte GA-EP45-UD3P
[url=http://www.gigabyte.com.tw/Products/Motherboard/Products_Spec.aspx?ProductID=2919][/url]

Graphics Card : GeForce 8600 GT
[url=http://www.nvidia.com/object/geforce_8600.html][/url]

Even after entering BIOS, it occurs.