The seperation of the lens assembly and the screen assembly allows access to the motherboard

gently disconnect the two ribbon cables (indicated in red on the second image) that connect the motherboard to the lens assembly by lifting up the black pieces of the bracket and pulling gently.

The ribbon cables are extremely difficult to reattach. Disconnect at your own risk.

There will be a slight bit of glue connecting the two potions that can be removed with a a little force.