I am trying to replace my onboard video card Intel 82810 with a Radeon 7000. My problem is after i shut down onboard card (in accordance with Hewlett Packard) I plug in Radeon card and reboot. The thing is my hard drive will not boot. I am just stuck at the opening HP screen. Any ideas???

i just worked on an hp vectra, that has a nvidia card and the onboard video wasn't disabled and the only thing was the yellow ! in device manager next to the onboard intel entry, so I checked the disable in all hardware profiles box, and after rebooting in device manager that put a red x over it. as far as I know it wasn't causing any problems the way it was, I was just installing a 20 gig hd ,and disabled the onboard video in device manager to free up some resources. so try it without disabling onboard video.

I installed an ATI RADEON PCI 32MB (no AGP slot)on my Pentium III O/S Windows Me. My system also had the same i810 intergrated graphics. If I remember correctly the instructions for installation said to disable the onboard video in device manager . On my system I disabled it in 2 places in device manager , under display adapters and under system devices . Then after disabling , reboot and your system,it should automatically install the standard VGA software. Then proceed to install the software and drivers for your new graphics card. In the BIOS my system did not have an option to disable onboard video . Check your BIOS and if it has this option go ahead and disable it in the BIOS also ! LOL, Nick

Might be something of interest here http://www.sharkyextreme.com/hardware/articles/video_card_install_guide/