Recheck all the cables and make sure they are plugged in properly.
When you install a new video card you have to remove ALL drivers for the old card.
Uninstall the drivers for the old card in Add/Remove Programs and if you don't have the option there, check in Control Panel/Device Manager and make sure there are not 2 cards showing under Display Adapters. If the old one is still showing, Highlight it and click Remove.
Uninstall the new video card drivers, restart then re-install the new drivers.
If you are still having problems with the CD-ROM after you get the video card sorted out: Right click My Computer>Properties>Device Manager. Double left click the CDROM heading and highlight your CD-ROM drive. Go to the bottom of the device manager box and select Remove with the CD-ROM drive highlighted. OK the dire warnings and reboot. It will reinstall your CD-ROM drive.
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