Video Problem

[Roche]

I just bought a new system. When I attempted to take out my new Monster Fusion (Banshee chipset)and replace it with the card that came with the system to begin with,I got a problem. There was no video. The hard drive was spinning and everything else seemed to work (except there did not seem to be power to the floppy). The old 2d card is still good because it works in my new system. Im baffled. Thanks for the help!!