Removing the system board....................................................54Prerequisites.....................................................................................................54Procedure.........................................................................................................55Replacing the system board.................................................... 58Procedure........................................................................................................ 58Post-requisites................................................................................................. 59Removing the coin-cell battery..............................................60Prerequisites.................................................................................................... 60Procedure........................................................................................................ 60Replacing the coin-cell battery.............................................. 62Procedure........................................................................................................ 62Post-requisites................................................................................................. 62Removing the heat sink............................................................63Prerequisites.....................................................................................................63Procedure........................................................................................................ 63Replacing the heat sink............................................................ 65Procedure........................................................................................................ 65Post-requisites................................................................................................. 65Removing the fan...................................................................... 66Prerequisites.................................................................................................... 66Procedure.........................................................................................................67Replacing the fan...................................................................... 69Procedure........................................................................................................ 69Post-requisites.................................................................................................696