Power off the device.

Unscrew the 6 screws as shown in the diagram.

Open the top cover from the back of the machine.

Take photos to document the positions of all the connectors.

Disconnect the connectors and wires shown in the diagram.

Carefully remove the top cover of the machine.

Unscrew the 9 screws as shown in the diagram.

Continue by unscrewing the 4 screws as indicated.

Carefully remove the wooden board and replace it with a new one.

Reassemble the device, making sure all connectors are securely attached as shown in the diagram.

Once the process is complete, power on the device and it should function normally.