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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

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

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

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

Major components of OptiPlex 3090 Small Form Factor ........................................................................................ 11

Side cover............................................................................................................................................................................ 12

Removing the side cover............................................................................................................................................12

Installing the side cover.............................................................................................................................................. 13

Front bezel...........................................................................................................................................................................15

Removing the front bezel...........................................................................................................................................15

Installing the front bezel.............................................................................................................................................15

2.5-inch hard drive............................................................................................................................................................ 16

Removing the 2.5-inch hard-drive assembly.........................................................................................................16

Removing the hard-drive bracket.............................................................................................................................17

Installing the hard-drive bracket.............................................................................................................................. 18

Installing the 2.5-inch hard-drive assembly...........................................................................................................19

3.5-inch hard drive............................................................................................................................................................20

Removing the 3.5-inch hard-drive assembly........................................................................................................ 20

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

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

Installing the 3.5-inch hard-drive assembly.......................................................................................................... 23

M.2 solid-state drive.........................................................................................................................................................24

Removing the M.2 2230 PCIe solid-state drive................................................................................................... 24

Installing the M.2 2230 PCIe solid-state drive..................................................................................................... 25

Removing the M.2 2280 PCIe solid-state drive...................................................................................................26

Installing the M.2 2280 PCIe solid-state drive..................................................................................................... 27

Optical drive....................................................................................................................................................................... 29

Removing the slim optical-drive...............................................................................................................................29

Installing the slim optical-drive.................................................................................................................................30

Hard-drive and optical-drive bracket............................................................................................................................ 31

Removing the hard-drive and optical-drive bracket............................................................................................ 31

Installing the hard-drive and optical-drive bracket............................................................................................. 32

WLAN card..........................................................................................................................................................................34

Removing the WLAN card.........................................................................................................................................34

Installing the WLAN card...........................................................................................................................................35

Fan assembly...................................................................................................................................................................... 37

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