Contents1 Working on Your Computer................................................................................6Before Working Inside Your Computer................................................................................................ 6Recommended Tools............................................................................................................................ 7Turning Off Your Computer..................................................................................................................7After Working Inside Your Computer................................................................................................... 82 Removing and Installing Components............................................................. 9System Overview................................................................................................................................... 9Inside view — backInside view — front...........................................................................................9Removing the Secure Digital (SD) Card..............................................................................................10Installing the SD Card..........................................................................................................................10Removing the ExpressCard................................................................................................................. 11Installing the ExpressCard................................................................................................................... 11Removing the Battery.......................................................................................................................... 11Installing the Battery............................................................................................................................12Removing the Micro Subscriber Identity Module (SIM) Card.............................................................12Installing the Micro Subscriber Identity Module (SIM) Card...............................................................13Removing the Keyboard Trim............................................................................................................. 13Installing the Keyboard Trim............................................................................................................... 14Removing the Keyboard...................................................................................................................... 15Installing the Keyboard........................................................................................................................ 17Removing the Base Cover...................................................................................................................18Installing the Base Cover.................................................................................................................... 20Removing the Primary Memory......................................................................................................... 20Installing the Primary Memory........................................................................................................... 20Removing the Secondary Memory.....................................................................................................20Installing the Secondary Memory....................................................................................................... 21Removing the Optical Drive................................................................................................................ 21Installing the Optical Drive..................................................................................................................22Removing the Hard Drive....................................................................................................................23Installing the Hard Drive..................................................................................................................... 24Removing the Wireless Local Area Network (WLAN) Card............................................................... 24Installing the Wireless Local Area Network (WLAN) Card................................................................. 24Removing Wireless Wide Area Network (WWAN) Card (Optional)................................................... 24Installing the Wireless Wide Area Network (WWAN) Card (Optional)............................................... 25Removing the Processor Fan..............................................................................................................25Installing the Processor Fan................................................................................................................26Removing the Video-Card Fan...........................................................................................................263