New video card and monitor help

[mg33]

Hi everyone. Today I just purchased a new video card, a nvidia 6600 gt AGP. A guy installed and sold it to me but when he tried it on his monitor it worked fine. But now when I try it on my monitor it just pops out as a blank screen. Does this mean I have to buy a new monitor (his monitor was bigger then mine if that has to do with anything) or do I just have to change some settings in my computer in order for the monitor to respon properly. Everything else works the same. My monitor is a Compaq FS7600 15-16 inches I believe. My Main concern is if I have to buy a new monitor(if so how big) or can I simply change this with a change in the settings. Thank you for your time.

 

[thewoosterisroot]

Monitor size is going to have little to do with it. Did you check to make sure that your monitor is plugged into the AVG card and not onboard? I know it sounds basic, but it's a detail a lot of people forget. That is, if you have onboard video.

 

[Blind Dragon]

Did you install the drivers for it?

 

[mg33]

I feel really dumb right now. I was plugging it into the onboard instead of the AVG card. Thanky you all for your help.