My friends screen will not show anything

jv1993

Distinguished
Apr 8, 2009
14
0
18,510
Hi, my friend attempted to setup a dual monitor but he messed up on something. When he turns on his computer it shows the loading screen but right after that the screen turns black and nothing shows. Any help?
 

505090

Distinguished
Sep 22, 2008
1,575
0
19,860
so i assume it works fine is safemode

go to device manager and uninstall the video card when you rebooot it will reinstall and set to default settings