12 Replacing the coin-cell battery...................................................................................................22Procedure............................................................................................................................................................................. 22Post-requisites.....................................................................................................................................................................2213 Removing the heat sink............................................................................................................. 23Prerequisites.........................................................................................................................................................................23Procedure............................................................................................................................................................................. 2314 Replacing the heat sink..............................................................................................................24Procedure............................................................................................................................................................................. 24Post-requisites.....................................................................................................................................................................2415 Removing the display assembly.................................................................................................. 25Prerequisites........................................................................................................................................................................ 25Procedure.............................................................................................................................................................................2516 Replacing the display assembly.................................................................................................. 27Procedure............................................................................................................................................................................. 27Post-requisites..................................................................................................................................................................... 2717 Removing the headset port........................................................................................................ 28Prerequisites.........................................................................................................................................................................28Procedure............................................................................................................................................................................. 2818 Replacing the headset port........................................................................................................ 30Procedure.............................................................................................................................................................................30Post-requisites.....................................................................................................................................................................3019 Removing the fans.....................................................................................................................31Prerequisites......................................................................................................................................................................... 31Procedure..............................................................................................................................................................................3120 Replacing the fans.................................................................................................................... 33Procedure............................................................................................................................................................................. 33Post-requisites.....................................................................................................................................................................3321 Removing the system board....................................................................................................... 34Prerequisites.........................................................................................................................................................................34Procedure............................................................................................................................................................................. 3422 Replacing the system board.......................................................................................................36Procedure............................................................................................................................................................................. 36Post-requisites.....................................................................................................................................................................36Entering the Service Tag in the BIOS setup program.................................................................................................... 3623 Removing the power button with optional fingerprint reader........................................................ 37Prerequisites.........................................................................................................................................................................374 Contents