The main PCB is maintained by 2 hooks at the top and 2 at the bottom

Make sure the keyboard is in the open position to get the maximum length for the screen's Flat Plastic Cable (FPC)

Press the 2 top hooks to release the PCB

There may be a sticker close to the 2 bottom hooks: peel it

Lift the PCB up and disconnect the screen FPC cable, then remove completely the PCB from the plastic case