@robertomih87445 all of this "phone boots up, my pc recognizes it. even its vibrating while calling it." is what your phone should do if the display is not working. Did you make sure that you have the right display for your exact model. Have you tried a different vendor, just to rule out bad workmanship? After that you will need to get the schematic and boardview for your main board and try to perform some board level repair. Unless you have experience with that, it'll be difficult, but I would start at the display connector. Schematics etc. are available but I have not yet found any free copies. You'd be looking at something like this
[image|3039971]
[image|3039972]
[image|3039974]
While you work on your phone, take lots of pictures. Once you are done with it, take those pictures and create a guide for iFixit. That will help the next person that has the same problem as you do. It's easy and fun to create these guides. https://ifixit.com/Guide/new The iFixit community will appreciate this.