Removing the system board....................................................55Prerequisites.....................................................................................................55Procedure........................................................................................................ 56Replacing the system board.................................................... 59Procedure........................................................................................................ 59Post-requisites.................................................................................................60Removing the coin-cell battery.............................................. 61Prerequisites..................................................................................................... 61Procedure.........................................................................................................61Replacing the coin-cell battery.............................................. 63Procedure........................................................................................................ 63Post-requisites................................................................................................. 63Removing the heat sink............................................................64Prerequisites.................................................................................................... 64Procedure........................................................................................................ 64Replacing the heat sink............................................................66Procedure........................................................................................................ 66Post-requisites.................................................................................................66Removing the fan...................................................................... 67Prerequisites.....................................................................................................67Procedure........................................................................................................ 68Replacing the fan...................................................................... 69Procedure........................................................................................................ 69Post-requisites.................................................................................................69