Okay, So I bought this Dell inspiron 15 3521 on 28th of February, 2014. So the issue is, my screen has got black spots. But the thing is, those black points or dots turn into a shiny white bright dots, when the laptop screen is subjected to top view or side view. From the front, it looks black. I tried taking pictures, but no camera was capable to capture those 1x1 sized black dots. Please help me identify if it is a dead pixel. or let me know how should I identify whether it is a dead pixel or something else.