My laptop (a Lenovo Y510P) recently took a hit. It immediately shut down and now it is having trouble completely starting up. When I hit the on button, the fans start and the keyboard lights up but the screen doesn't do anything. I have already dissassembled it and made sure that everything was plugged in and looking fine. I discovered through experimentation that booting up without he hard drive does result in the screen working, but it just says things like "EFI Network 0 for IPv4 (xx-xx-xx-xx-xx-xx) boot failed" and so on. What should I do?