The Laptop That Made Grinding Noise

I sent my Dell Precision M4700 to the Dell resolution center, about a week ago, because the screen was turning green. Even while I was online, Facebook, YouTube etc. This laptop would turn everything green, and heat up hot enough to fry an egg. That's not all, it started making grinding noises, which seem to be coming from the Hard Drive. So for the grinding noise, dell sent a Dell Tech, who didn't fix it. In fact he didn't know what it was from. That was a year ago. Now further into the future about a week ago i sent my laptop to the Dell Resolution Center, somewhere in Texas, because of the heating and the green haze that was over taking my laptop monitor screen. It came back about four days later, without any screen visual to log in with. Just total darkness, with the dell start-up music going off behind it. So I call the Dell Support team, and had a new Service Request and shipping box from Dell Basic Warranty Support sent.  It came back three days latter from the Resolution Center, worked for a couple of days, and then the grinding noise came back. Loud as before but more frequent than before. And now my laptop is unusable. My warranty will run out next month. And after all the so called Dell computer repairmen that claimed it was repair, they have fixed anything. As a matter of fact, I think they just cleared out my Hard Drive memory and told me it was new one. Exactly what am I to do, if my warranty runs out and they haven't repair my Dell Precision M4700?