Screen is completely black

Hello,

I have this problem with my laptop for a month now, my laptop is HP intel core i3 windows 7. Before this problem occurs i reformat the laptop and intalled windows 8 instead. It works fine until the windows keep on updating but the updates were not successful and while I'm using the laptop it suddenly went black and nothing displayed on the monitor.

I don't know how to solve it that's why i had to shut it down forcefully. I brought the laptop to local technician and he said the problem is video card. But my mistake, i trusted him and let him fix the problem without consulting] if he really replaced the damage video card. Well don't blame me i was just happy to see my laptop working again. After i had it repaired, i didn't use the laptop for a week coz i was busy that time. When i had to use it again there it is again after few hours of using it, the problem is back! When i had to shut it down the windows was displayed until the screen turns black even i didn't tick the shutdown down button yet. I cried coz i pay 2,000 pesos for nothing. Now, i can't use it any more