I cant get igpu to work

I want to move from my gt 730 which is apparently a rebranded gt 430 which performs worse than my igpu which is a radeon 6550d. but simply taking my dedicated card out didnt work, so i tried unistaling its drivers in a live cd, but that didnt work it will still boot me into a black screen with a blinking white bar at the top left corner. is a way to get this to work without reinstalling my os?