Contents1 Working on your computer............................................................................................................................. 6Safety instructions............................................................................................................................................................. 6Before working inside your computer........................................................................................................................6Safety precautions....................................................................................................................................................... 7Electrostatic discharge—ESD protection................................................................................................................. 7ESD field service kit .................................................................................................................................................... 8Transporting sensitive components........................................................................................................................... 9After working inside your computer...........................................................................................................................92 Technology and components........................................................................................................................ 10USB features..................................................................................................................................................................... 10USB 3.0/USB 3.1 Gen 1 (SuperSpeed USB)............................................................................................................10Speed............................................................................................................................................................................ 11Applications.................................................................................................................................................................. 11Compatibility................................................................................................................................................................12USB Type-C.......................................................................................................................................................................12Alternate Mode........................................................................................................................................................... 12USB Power Delivery................................................................................................................................................... 12USB Type-C and USB 3.1........................................................................................................................................... 12Thunderbolt over USB Type-C..................................................................................................................................13Thunderbolt 3 over USB Type-C.............................................................................................................................. 13Key Features of Thunderbolt 3 over USB Type-C .................................................................................................13Thunderbolt Icons.......................................................................................................................................................14HDMI 1.4a...........................................................................................................................................................................14HDMI 1.4a Features.................................................................................................................................................... 14Advantages of HDMI..................................................................................................................................................14Power button LED behavior............................................................................................................................................ 15Power button LED behavior without Fingerprint readerPower On and LED behavior with Fingerprintreader........................................................................................................................................................................... 153 Disassembly and reassembly.........................................................................................................................17microSD card..................................................................................................................................................................... 17Removing microSD card.............................................................................................................................................17Installing microSD card............................................................................................................................................... 17Base cover.........................................................................................................................................................................18Removing the base cover..........................................................................................................................................18Installing the base cover............................................................................................................................................ 21Battery...............................................................................................................................................................................24Lithium-ion battery precautions............................................................................................................................... 24Removing the battery................................................................................................................................................25Installing the battery.................................................................................................................................................. 26Memory modules............................................................................................................................................................. 28Removing the memory.............................................................................................................................................. 28Contents 3