1 Working on your computer............................................................................................................ 6Safety instructions.................................................................................................................................................................6Before working inside your computer........................................................................................................................... 6Safety precautions...........................................................................................................................................................7Electrostatic discharge—ESD protection.................................................................................................................... 7ESD field service kit ........................................................................................................................................................8Transporting sensitive components.............................................................................................................................. 8After working inside your computer.............................................................................................................................. 92 Technology and components........................................................................................................10DDR4......................................................................................................................................................................................10USB features......................................................................................................................................................................... 11USB Type-C.......................................................................................................................................................................... 13HDMI 1.4................................................................................................................................................................................ 14USB features........................................................................................................................................................................ 15Power button LED behavior............................................................................................................................................... 163 Disassembly and reassembly........................................................................................................ 19Base cover............................................................................................................................................................................ 19Removing the base cover..............................................................................................................................................19Installing the base cover............................................................................................................................................... 20Battery.................................................................................................................................................................................. 22Lithium-ion battery precautions...................................................................................................................................22Removing the battery................................................................................................................................................... 23Installing the battery......................................................................................................................................................24WLAN card........................................................................................................................................................................... 24Removing the WLAN card............................................................................................................................................24Installing the WLAN card.............................................................................................................................................. 25WWAN card......................................................................................................................................................................... 26Removing the WWAN card.......................................................................................................................................... 26Installing the WWAN card.............................................................................................................................................27Memory modules................................................................................................................................................................. 28Removing the memory module.................................................................................................................................... 28Installing the memory module...................................................................................................................................... 29Solid state drive................................................................................................................................................................... 30Removing the M.2 2280 SATA SSD........................................................................................................................... 30Installing the SATA M.2 2280 SSD.............................................................................................................................. 31Coin-cell battery.................................................................................................................................................................. 32Removing the coin-cell battery....................................................................................................................................32Installing the coin-cell battery...................................................................................................................................... 33Inner frame........................................................................................................................................................................... 33Removing the inner frame............................................................................................................................................ 33Installing the inner frame.............................................................................................................................................. 35Heatsink assembly-discrete............................................................................................................................................... 36ContentsContents 3