Before working inside your computer.............................................................................................................................6

Safety instructions.............................................................................................................................................................. 6

Electrostatic discharge-ESD protection......................................................................................................................7

ESD field service kit ........................................................................................................................................................... 7

Transporting sensitive components................................................................................................................................ 8

After working inside your computer................................................................................................................................9

Chapter 2: Removing and installing components.......................................................................... 10

Recommended tools..........................................................................................................................................................10

Screw list............................................................................................................................................................................. 10

Major components of Inspiron 15 3520......................................................................................................................... 11

Secure Digital (SD) Card..................................................................................................................................................13

Removing the Secure Digital card............................................................................................................................13

Installing the Secure Digital card.............................................................................................................................. 13

Base cover........................................................................................................................................................................... 14

Removing the base cover...........................................................................................................................................14

Installing the base cover.............................................................................................................................................18

Battery.................................................................................................................................................................................. 21

Lithium-ion battery precautions............................................................................................................................... 21

Removing the 3-cell battery..................................................................................................................................... 22

Installing the 3-cell battery....................................................................................................................................... 22

Removing the 4-cell battery..................................................................................................................................... 23

Installing the 4-cell battery....................................................................................................................................... 24

Disconnecting the battery cable..............................................................................................................................25

Connecting the battery cable...................................................................................................................................26

M.2 solid-state drive.........................................................................................................................................................27

Removing the M.2 2230 solid state drive..............................................................................................................27

Installing the M.2 2230 solid state drive................................................................................................................28

Removing the M.2 2280 solid state drive..............................................................................................................29

Installing the M.2 2280 solid state drive................................................................................................................30

Wireless card.......................................................................................................................................................................31

Removing the wireless card.......................................................................................................................................31

Installing the wireless card........................................................................................................................................ 32

I/O board.............................................................................................................................................................................34

Removing the Input/Output board......................................................................................................................... 34

Installing the Input/Output board........................................................................................................................... 35

I/O daughter board FFC..................................................................................................................................................36

Removing the Input/Output daughterboard FFC................................................................................................36

Installing the Input/Output daughter board FFC.................................................................................................37

Hard drive assembly......................................................................................................................................................... 39

Removing the hard drive .......................................................................................................................................... 39

Installing the hard drive..............................................................................................................................................40

Contents