My DELL vostro 200 is not booting up. When I press the power on button it tries to start, blinks the light on the power on button, runs the CPU fan for one second and stops. Then repeats the cycle after 2 second without touching the button. This cycle repeats forever. No display, no beep sound. What will be the problem ? Please help me to rectify this.

My motherboard is Foxconn G33Mo2
http://en.community.dell.com/media/p/19534235.aspx


http://support.dell.com/support/edocs/systems/vos200/en/slim_tower/om_en/html/parts.htm#wp1482059

I have TRIED by removing the CPU power supply plug (Please refer manual - 31 in motherboard layout). Now the CPU fan is running continuously. Even now no beep sound, No display. It sounds like a bad power supply but this may not be the case. Can you give me some more details about your computer: Operating system, CPU, VIDEO card, etc?^^^Also, please list the make and model of the Motherboard if you know what it is^^^might be your video card It could be the video card but unlikely in my opinion. An infinite on/off loop is usually a sign that the power supply is on its way out or has died. It could also be overheating issues or a bad switch.Please list your computer specifications.

Also if you have another computer try swapping the power supply. See if it runs correctly with the power supply from the other computer. If it does then you need to BUY a new power supply.I have tried by disconnecting the CPU DC supply ( the 4 wired squire connector) and SWITCHING on the pc. Now the CPU fan is continuously running, But even now no beep sound ,no display.