Replacing the speakers................................................ 42Procedure................................................................................................42Post-requisites........................................................................................ 42Removing the fan.........................................................43Prerequisites............................................................................................43Procedure................................................................................................43Replacing the fan.........................................................45Procedure............................................................................................... 45Post-requisites........................................................................................ 45Removing the heat sink................................................46Prerequisites........................................................................................... 46Procedure............................................................................................... 46Replacing the heat sink................................................48Procedure............................................................................................... 48Post-requisites........................................................................................ 48Removing the power and volume-buttons board.......... 49Prerequisites........................................................................................... 49Procedure............................................................................................... 49Replacing the power and volume-buttons board........... 51Procedure................................................................................................ 51Post-requisites......................................................................................... 51Removing the status-light board.................................. 52Prerequisites........................................................................................... 52Procedure............................................................................................... 525