Laptop Screen is Blank

Hello! I have been having issues with my laptop recently, and it has been thermally shutting down every couple of hours if I use it. Today I used it and it shut down, but when I turned it on the screen was blank. I have an HP envy dv6 from December 2012 with Windows 8. It started out normally, and showed the HP logo and a loading symbol, but afterwords the screen just went blank. All black. I restarted it multiple times, and got an error message that read "Your PC ran into a problem. It will restart on it's own" (or something along those lines). I waited, but nothing happened, so I turned it off, unplugged it from the power cord, removed the battery, held the power button, plugged in the power cord, and turned it back on. Unfortunately, there was no change. Does anyone have any solutions to the issue??? I need to use it for a project and all of my work was saved on it :( I also can't afford a new computer, so I really need help. Any suggestions are appreciated :)