Here is the article about the complete guideline for Lenovo Vibe K4 Note display replacement. It will help you to change the cracked or damaged screen of Lenovo K4 Note. You can change it by yourself and save your money.
If you are a Mobile Technician, this will help you a lot.
You can learn not only the procedure of changing the display, but you can learn how to change the battery, Charging Board, complete dissembling of Lenovo K4 Note.