Question : Problem: geoforce 8400 dual disp

I have a new hp machine with integrated integ graphics g45/43 chipset.  I put in a geoforce 8400 to have a dual display and the onboard graphic port seems dead.  Any ideas?  In device manager there was no g45/g43 video driver so I installed it.  It says that it cannot start.  help thanks,  gsgi

Windows xp sp3.

Answer : Problem: geoforce 8400 dual disp

When you install a video card, the onboard is disabled by default.    you can either use a video card with dual display capability, or install multiple video cards, however, running a karaoke company as well as IT work, I have tried many possibilities and have been unable to find any sucessful solutions to keep the onboard graphics working when a secondary card is installed