did you go into the bios and turn off the onboard video card?
I had a PC with a Gigabyte P4 Titan motherboard model GA-8ID533 with P4 1.7 Celeron processor, AGP 4x Nvidia TNT Riva with 32 MB, 512MB PC133 RAM and 30GB HDD running Windows 2000 Professional. The monitor was a Samsung 570V TFT LCD monitor. Everything was working fine until I tried to upgrade my VGA Card to an ATI Radeon 9200SE with 128 MB RAM. When I first installed the card it worked fine until I booted Windows 2000 and installed the display drivers. The display then in VGA mode either disappeared or was shifted downwards so that I couldn't see the lower 1/4 of the screen. I tried adjusting the monitor settings and position but in vain. The only solution was to wait for the machine to boot windows 2000 and load the drivers which then will fix the display and work fine. Now I am not able to install any other operating system, run the recovery console or even see BIOS messages at the beggining. Iam only allowed to wait for the computer to boot windows 2000 blindly. I was not sure if the problem was with the AGP 4x/8x capability of the card. I reinstalled the Nvidia Card again and it worked fine. I tried to reinstall the Radeon card and it worked fine with the startup screen until I made a restart the problem reappeared. I was advised to change the motherboard to a newer one with AGP 8x capability. I did so and upgraded the motherboard to a Gigabyte GA-8I848P motherboard with Intel 848 chipset and an 8x AGP slot. When I installed the VGA card everything went fine even after I restarted the computer and after I installed the drivers for Windows 2000. I then installed Windows XP on a separate partition and the installation went fine until it asked for the drivers for the VGA card and when I installed them the same problem appeared and I was unable to get the display to perform normally afterwards. I don't know were the problem lies now ! In the VGA card, in the monitor or in the display drivers (I doubt, the problem stays even in the BIOS startup screen).
Please can any body give some help, I am not willing to upgrade the monitor also !