Power on but didn't boot

[rtdhananjaya.2001]

When I pressed power button, Power LED and HDD-LEDs lights.But HDD-LED turned off after 3 or 4 seconed. I can hear the sound of fans,cd rom and hard disk runs. Please tell me how to slove this problem.(I hawe ASUS H81M-P motherboard)

 

[rocktalkrock]

Have you cleared the CMOS? What is your HDD, GPU, PSU and operating system?