Laptop screen goes black when it starts.

abhi2000 Posts 1 Registration date Friday June 30, 2017 Status Member Last seen July 1, 2017 - Updated on Jul 2, 2017 at 05:06 AM
I have hp pavilion g4 laptop and I have window 7 ultimate . by mistake i have removed system g from disk management . now my laptop no longer to start is only show black screen.
Plz help