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 Latitude 7440..............................................................................................................................11
NanoSIM-card tray............................................................................................................................................................ 13
Removing the nanoSIM-card tray ...........................................................................................................................13
Installing the nanoSIM-card tray ............................................................................................................................. 13
Base cover........................................................................................................................................................................... 14
Removing the base cover ......................................................................................................................................... 14
Installing the base cover ............................................................................................................................................16
Solid-state drive................................................................................................................................................................. 18
Removing the M.2 2230 solid-state drive..............................................................................................................18
Installing the M.2 2230 solid-state drive................................................................................................................19
Wireless Wide Area Network (WWAN) card.............................................................................................................. 20
Removing the 4G WWAN card ............................................................................................................................... 20
Installing the 4G WWAN card .................................................................................................................................. 21
Removing the 5G WWAN card ................................................................................................................................ 21
Installing the 5G WWAN card ................................................................................................................................. 23
Battery................................................................................................................................................................................. 24
Lithium-ion battery precautions...............................................................................................................................24
Removing the 2-cell battery ....................................................................................................................................24
Installing the 2-cell battery ...................................................................................................................................... 25
Removing the 3-cell battery ....................................................................................................................................26
Installing the 3-cell battery ...................................................................................................................................... 27
Battery cable...................................................................................................................................................................... 28
Removing the battery cable .................................................................................................................................... 28
Installing the battery cable........................................................................................................................................29
Heat-sink............................................................................................................................................................................. 30
Removing the heat-sink ............................................................................................................................................30
Installing the heat-sink and fan assembly...............................................................................................................31
Coin-cell battery................................................................................................................................................................ 32
Removing the coin-cell battery ...............................................................................................................................32
Installing the coin-cell battery .................................................................................................................................33
Display assembly................................................................................................................................................................34
Contents
Contents 3
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