Thank you for getting back to me about this issue, I greatly appreciate all your help. I had 3 capacitors replaced on my mboard. Unfortunately, I don't have another computer to try this monitor on but what I meant by the monitor works but I'm getting a black screen is that when I connect the monitor to the tower the monitor turns on but goes to standby mode almost immediately, but when I turn the tower on it's not turning on, it just stays in stanby mode. I'm sorry I was not clear enough in my explaination of my issue, but this is the first time I've ever used this type of help, so I'm trying my best and really appreciate your patience with me.
When I originally swaped out the mboard I did not change any of my settings, I just swapped it out. The other mboard that I got for it was AGP as well, just not as good of a board as my original was. I disconnected my mboard connections and reconnected them and the monitor turned on for a short time and then the whole computer froze. When I tried to reset the computer the monitor would not come back out of standby mode again.
I'm not sure how to check my BIOS because I cannot get the monitor to come out of standby mode.
Thank you very much once again for all your help, I look forward to hearing any ideas you may have.