Contents1 Working on your computer............................................................................................................................. 7Safety precautions............................................................................................................................................................. 7Standby power..............................................................................................................................................................7Bonding .........................................................................................................................................................................7Electrostatic discharge — ESD protection............................................................................................................... 7ESD field service kit .................................................................................................................................................... 8Transporting sensitive components........................................................................................................................... 9Before working inside your computer..............................................................................................................................9After working inside your computer.................................................................................................................................92 Removing and installing components............................................................................................................10Recommended tools........................................................................................................................................................ 10Screw size list.................................................................................................................................................................... 11Subscriber Identity Module(SIM) board......................................................................................................................... 11Removing the Subscriber Identification Module card............................................................................................. 11Installing the Subscriber Identification Module card...............................................................................................12Base cover......................................................................................................................................................................... 12Removing the base cover.......................................................................................................................................... 12Installing the base cover............................................................................................................................................ 14Battery............................................................................................................................................................................... 14Removing the battery................................................................................................................................................ 14Installing the battery...................................................................................................................................................14Solid State Drive — optional ..........................................................................................................................................15Removing the SSD card.............................................................................................................................................15Installing the SSD card............................................................................................................................................... 16Removing the SSD frame.......................................................................................................................................... 16Installing the SSD frame.............................................................................................................................................17Hard drive.......................................................................................................................................................................... 17Removing hard drive...................................................................................................................................................17Installing hard drive ....................................................................................................................................................18Coin cell battery................................................................................................................................................................ 18Removing the coin cell battery................................................................................................................................. 18Installing coin cell battery...........................................................................................................................................19WLAN card........................................................................................................................................................................ 19Removing WLAN card................................................................................................................................................19Installing WLAN card................................................................................................................................................. 20WWAN card – optional................................................................................................................................................... 20Removing the WWAN card.......................................................................................................................................20Installing the WWAN card..........................................................................................................................................21Memory modules.............................................................................................................................................................. 21Removing the memory module................................................................................................................................. 21Installing the memory module...................................................................................................................................22Keyboard........................................................................................................................................................................... 22Contents 3