Black screen after installing Asus nvidia geforce gt 730

[Arjan Hansen]

Hi all , I have a problem with my amd athlon x2 250 3 ghz ... bought it but realised Quick enough I needed a lot better vid card so I bought the geforce .... it has an onboard vid card I cant seem to turn off in bios... after installing the card I only had a black screen ... not even bios is view able ... is there a way to disable the onboard in Windows then turn off install the new card and startup????

 

[Arjan Hansen]

Is there anyone with a ACER Veriton M421G motherboard manuall????? I need it to see if i can disable the darn thing thrue a jumper setting !!!