The amber-coloured ribbon cable is locked.
You need to lightly pull up the brown plastic part on both sides. Use a small screwdriver for that.
Afterwards the ribbon cable is loose; you can pull it out.
Remove the four black screws on the main-board…
…and extract the main-board.
Now we’ll remove the pcb with the three rotary encoders.
First remove the three caps…
…and then the two screws.
Now you should be able to remove the whole pcb including the plastic- and metal-frames.
Remove the display.
Now we are able to work on the enclosure.