Now that the board is free desolder the two wires from the board.

Once the wires are desoldered remove the four screws from the black plastic mounting and then take out the circuit board and screen.

The ribbon cable connected to the writing surface should pop off he board easily, no soldering required!

The screws in the mounting are 7 mm long PH0 Phillips head.

Soldering irons and solder get very hot, ensure you are following proper procedure when desoldering the wires.