LCD replacement Vostro 15-7510

Follow the procedures in Vostro 15 7510 Service Manual. 

Look on YouTube for videos showing disassembly of your model. But, be cautious with them, as some use steps or methods that are not appropriate. Use the videos to add to your understanding of what to do, but follow the steps in Dell's manual.

Get the right tools and be organized. I place screws in separate containers (I use a chocolate box tray) labelled with numbers corresponding to numbers I write on a notepad describing where each type of screw came from. 

Whenever touching components or working inside a computer, wear a grounded wrist strap, also called anti-static wrist strap, ESD wrist strap, or ground bracelet. It's a cheap and sensible precaution. Rest the laptop on an anti-static mat or at least a reasonable alternative such as corrugated cardboard. (Repeatedly touching a metal case part is not sufficient mitigation with modern components.)