I having the same problem
I bought this new video card radeon 4350 the problem that im having is that
when it is plugged on add-in video card no display at all but when i plug the cable on integrated or on-board video card or what so ever... there goes the display...
when i look on the bios it doesn't detect anything... my desktop's spec's for other information
dell dimension e520
Geforce 7500 (integrated)
Windows 7 for OS