# Unplug charger.
# '''Remove''' the screws on bottom cover
# Remove battery
# Unplug & loosen the hard drive cable. ...
# Unplug & loosen the antenna cables.
# '''Remove''' the bracket screws. ...
# '''Remove''' the tape. ...
# Open the laptop flat. ...
# Use fingers to pry apart and separate back cover from screen.
This video should help :
https://www.parts-people.com/blog/2018/07/09/dell-inspiron-11-3147-p20t001-display-hinges-removal-and-installation/