I have a motherboard 945pl-s3p with Radeon HD 4850 installed , My mobo had a problem so I changed it to GA-G41m-es2l , and the PC worked fine without formatting , the problem now is that the PC is using the integrated VGA on the mobo not the installed HD 4850 , even the windows can't detect it .
How to disable the Integrated mobo VGA and activate my lovely external HD 4850 again ?
NB: I'm using the DVI port of the HD 4850 not the vga port of the mobo , pradoxically the windows can't detect the external vga !!
More about :activate external vga 4850 disable mobo vga