Hi, so I've bought the Nitro 5 AN517-51 literally the day before posting this. Everything was fine, went home, set it up and left it charging for the night. Wake up, boot it up, and test out a new game- it all worked perfectly. Leave to run some errands, come back, and now the scree  won't turn on. They keyboard is on, the power indicator light is on, and I can even hear it boot up when I listen closely, so the computer is definitely on. The only thing is that the screen remains black, please help a guy out. Just wanna play some games. And not have an expensive brick sitting on my table. 
//Edited the content to add model name.