@agamsharma since iFixit does not yet have a specific guide for that, use the [document|41397]to work on it. Page 67 will tell you how to work on the display assembly.
While you work on your computer, 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 a device with the same issues as you do. It's easy and fun to create these guides. https://ifixit.com/Guide/new The iFixit community will appreciate this.
Repair is War on Entropy!