Display Issues

So I get help and I get the monitor into place.
I began testing the computer on each of the three monitors.
For some reason no image was showing on ANY of the monitors.
I brought the PC upstairs and tested via the video card on a PC monitor, I had no issue. I also tested the s-video and hooked it up to my 32" TV, again no issue.
I took the PC downstairs and started to test it running MAME on the installed monitor and no image. I don't know what the problem could be.

To save myself from running up and down the stairs I'm going to bring the PC monitor downstairs and continue testing. I have no clue what the problem is, but its really bothering me.