I can't see any thing on my monitor screen, but I can hear the hard drive turning and I see all the lignts such as CD-ROM, Floppy etc. I put a know working video card and still nothing. The hard drive boots fine in another system. The motherboard is not dead because the CPU fan gets power from the board and it works fine like every thing else. So why this system that was working for a very long time just stop showing any thing on the monitor. Oh, the monitor works fine on another system too. Help any one!