I have an ECS motherboard, model GeForce6100SM-M2 (V1.0A), which has built in VGA graphics:
I have physically installed an ASUS EN8400GS Silent graphics card.
The graphics setting on my motherboards BIOS is:
"Enable if No Ext GPU", which is the closest I can get to turning the onboard GPU "off".
The motherboard is not recognizing that a graphics card is installed at boot up as I get nothing out of the ASUS graphics card ports.
I am able to boot into Windows XP with the motherboard VGA connected.
I can then attempt to install graphics card drivers for the ASUS card, however once I get half way through the process the screen goes black and I get nothing out of any display ports (both on the motherboard & on the graphics card). It is like the whole system enters "limbo"!
It doesn't seem to matter if I perform the automated ASUS drivers install, by double clicking setup on the disk, or if I go the manual way, by attempting a drivers update through "Device Manager".
If anybody has any suggestions on how I can successfully install the graphics card drivers they will be greatly appreciated.