25 Replacing the optical drive........................................................................................................ 39Procedure............................................................................................................................................................................. 39Post-requisites.....................................................................................................................................................................3926 Removing the graphics card...................................................................................................... 40Prerequisites........................................................................................................................................................................ 40Procedure.............................................................................................................................................................................4027 Replacing the graphics card....................................................................................................... 41Procedure..............................................................................................................................................................................41Post-requisites......................................................................................................................................................................4128 Removing the processor fan and heat-sink assembly................................................................... 42Prerequisites.........................................................................................................................................................................42Procedure............................................................................................................................................................................. 4229 Replacing the processor fan and heat-sink assembly................................................................... 44Procedure............................................................................................................................................................................. 44Post-requisites.....................................................................................................................................................................4530 Removing the processor............................................................................................................46Prerequisites........................................................................................................................................................................ 46Procedure............................................................................................................................................................................. 4631 Replacing the processor............................................................................................................ 47Procedure............................................................................................................................................................................. 47Post-requisites..................................................................................................................................................................... 4732 Removing the antenna modules................................................................................................. 48Prerequisites.........................................................................................................................................................................48Procedure............................................................................................................................................................................. 4833 Replacing the antenna modules..................................................................................................49Procedure............................................................................................................................................................................. 49Post-requisites.....................................................................................................................................................................4934 Removing the system board...................................................................................................... 50Prerequisites........................................................................................................................................................................ 50Procedure.............................................................................................................................................................................5035 Replacing the system board...................................................................................................... 54Procedure............................................................................................................................................................................. 54Post-requisites.....................................................................................................................................................................5636 System setup........................................................................................................................... 58BIOS overview..................................................................................................................................................................... 58Entering BIOS setup program............................................................................................................................................58Contents 5