Chapter 1: Working inside your computer...................................................................................... 6
Safety instructions.............................................................................................................................................................. 6
Before working inside your computer.......................................................................................................................6
Safety precautions.........................................................................................................................................................7
Electrostatic discharge—ESD protection................................................................................................................7
ESD field service kit ..................................................................................................................................................... 8
Transporting sensitive components.......................................................................................................................... 9
After working inside your computer..........................................................................................................................9
BitLocker..........................................................................................................................................................................9
Chapter 2: Removing and installing components.......................................................................... 10
Recommended tools..........................................................................................................................................................10
Screw list............................................................................................................................................................................. 10
Major components of Vostro 3420................................................................................................................................ 11
Base cover........................................................................................................................................................................... 13
Removing the base cover...........................................................................................................................................13
Installing the base cover.............................................................................................................................................15
Battery..................................................................................................................................................................................16
Lithium-ion battery precautions............................................................................................................................... 16
Removing the battery..................................................................................................................................................17
Installing the battery....................................................................................................................................................17
Memory modules................................................................................................................................................................ 18
Removing the memory modules............................................................................................................................... 18
Installing the memory modules..................................................................................................................................19
Wireless card...................................................................................................................................................................... 20
Removing the wireless card......................................................................................................................................20
Installing the wireless card.........................................................................................................................................21
Fan........................................................................................................................................................................................ 23
Removing the fan........................................................................................................................................................ 23
Installing the fan.......................................................................................................................................................... 23
M.2 solid-state drive.........................................................................................................................................................24
Removing the M.2 2230 solid state drive..............................................................................................................24
Installing the M.2 2230 solid state drive................................................................................................................25
Removing the M.2 2280 solid state drive..............................................................................................................26
Installing the M.2 2280 solid state drive................................................................................................................ 27
Touchpad.............................................................................................................................................................................28
Removing the touchpad.............................................................................................................................................28
Installing the touchpad...............................................................................................................................................29
Power-adapter port..........................................................................................................................................................30
Removing the power-adapter port......................................................................................................................... 30
Installing the power-adapter port............................................................................................................................ 31
Speakers.............................................................................................................................................................................. 32
Removing the speakers..............................................................................................................................................32
Installing the speakers................................................................................................................................................ 33
Contents
Contents 3