Dell inspiron 1520 pixel glitches

Hello everyone! So today i played gta san andreas when my dell laptop just freezed. 

Like this. I cannot turn off the laptop and alt f4 didn’t work either… so i unpluged the charger and waited. After like 5-10 minutes the laptop turnd off. I turned it back on and it worked like charm. After 1 hour the same thing happened, i repeated the procces. Again everything was fine until this happend the 3rd time… repeated the same thing… didn’t work. Waited 3 hours i tried again, nothing… after a couple of tries the laptop started but something was different… 

After a couple of seconds a whit screen showed up wich turned slowly in black an then in blue. Now that was not a normal blue screen of death because there was a big black horizontal line and some little lines too

 then i started pressing f2 but nothing showed up. this thing repeated and repeated and now im here writing this and i dont know what to do. The screen was replaced less then 3 months ago. Please somebody help me