Safety instructions.............................................................................................................................................................. 7

Before working inside your computer....................................................................................................................... 7

Safety precautions........................................................................................................................................................ 8

Electrostatic discharge-ESD protection............................................................................................................... 8

ESD field service kit ..................................................................................................................................................... 9

Transporting sensitive components.........................................................................................................................10

After working inside your computer........................................................................................................................ 10

BitLocker........................................................................................................................................................................ 10

Chapter 2: Removing and installing components...........................................................................11

Recommended tools...........................................................................................................................................................11

Screw list.............................................................................................................................................................................. 11

Major components of Precision 7865 Tower.............................................................................................................. 12

Side cover............................................................................................................................................................................ 14

Removing the side cover............................................................................................................................................ 14

Installing the side cover.............................................................................................................................................. 15

Front bezel ..........................................................................................................................................................................17

Removing the front bezel...........................................................................................................................................17

Installing the front bezel............................................................................................................................................. 17

I/O board..............................................................................................................................................................................18

Removing the front I/O bracket...............................................................................................................................18

Installing the front I/O bracket.................................................................................................................................19

External storage flexbay (Hard drive)..........................................................................................................................20

Removing the external hard-drive assembly........................................................................................................ 20

Installing the external hard-drive assembly...........................................................................................................20

Removing the external 3.5-inch hard-drive........................................................................................................... 21

Installing the external 3.5-inch hard-drive............................................................................................................ 22

Removing the external 2.5-inch hard-disk drive..................................................................................................23

Installing the external 2.5-inch hard-drive............................................................................................................ 24

External storage flexbay (Solid-state drive)...............................................................................................................25

Removing the external solid-state drive assembly..............................................................................................25

Removing the external M.2 2230 solid-state drive.............................................................................................26

Installing the external M.2 2230 solid-state drive............................................................................................... 27

Removing the external M.2 2280 solid-state drive.............................................................................................28

Installing the external M.2 2280 solid-state drive............................................................................................... 29

Installing the external solid-state drive assembly................................................................................................ 30

Slim optical-drive................................................................................................................................................................31

Removing the slim optical-drive............................................................................................................................... 31

Installing the slim optical-drive.................................................................................................................................32

Air shroud............................................................................................................................................................................ 33

Removing the air shroud............................................................................................................................................33

Installing the air shroud.............................................................................................................................................. 34

PCIe holder......................................................................................................................................................................... 35

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