Computer turns on but no image coming to monitor

[account_disabled]

I've got a Dell Dimension 8400 and a 2001FP monitor. When i boot the computer up, the video card's fan is spinning and the computer seems to power on fine... except for the fact that there is no image on the monitor.

The monitor itself acts as though it is connected to the computer while the computer is off. The light on the monitor normally remains yellow while the DVI cable is connected to the computer but the monitor is not powered on; because the yellow light is on, I assume that it is not the cable.

The computer seems to get into Windows because you have to hold the power button down to turn it off, which means that something is happening. However, I have a Logitech G15 and, while it is getting power, which I can tell because the num lock light is on, is nonresponsive. The LCD on the monitor doesn't work and the lock keys don't do anything.

Any ideas what the problem could be?

Please help.

Thanks!

I didn't find the right solution from the Internet.

References www.daniweb.com/hardware-and-software/hardware/threads/59730/computer-turns-on-but-no-image-coming-to-monitor

Best Corporate Video