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Lift the upper case off completely and disconnect the multicolored speaker cable from the logic board. As before, make sure you're pulling only on the connector and not on the socket.

Tip: the multi-coloured cable may be easier and less daunting to disconnect after removing the top heat shield. Prop the top case upright while removing the shield - the connector is then much more accessible.

Remove the following 15 screws:

• Fourteen 3 mm Phillips.
• One 5.5 mm Phillips in the upper left corner.

Lift the top shield up from the right side, minding the upper left corner, which may catch on the metal framework.