Table Of Contents - Dell ChengMing 3991 Service Manual

Table of Contents

Chapter 1: Working on your computer........................................................................................... 5

Safety instructions.............................................................................................................................................................. 5

Before working inside your computer.......................................................................................................................5

Safety precautions........................................................................................................................................................ 6

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

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

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

After working inside your computer..........................................................................................................................8

Chapter 2: Technology and components........................................................................................ 9

USB features........................................................................................................................................................................ 9

HDMI 1.4- HDMI 2.0.......................................................................................................................................................... 10

Chapter 3: Disassembly and reassembly....................................................................................... 11

Cover..................................................................................................................................................................................... 11

Removing the side cover.............................................................................................................................................11

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

Front Bezel.......................................................................................................................................................................... 14

Removing the front bezel...........................................................................................................................................14

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

Hard drive............................................................................................................................................................................ 16

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

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

Fan assembly.......................................................................................................................................................................21

Removing the fan assembly.......................................................................................................................................21

Installing the fan assembly........................................................................................................................................ 22

Optical drive........................................................................................................................................................................23

Removing the optical drive ...................................................................................................................................... 23

Installing the optical drive..........................................................................................................................................25

M.2 SSD card..................................................................................................................................................................... 25

Removing the M.2 SSD card.................................................................................................................................... 25

Installing the M.2 SSD card.......................................................................................................................................27

Power supply unit.............................................................................................................................................................. 27

Removing the power supply unit ............................................................................................................................ 27

Installing the power supply unit .............................................................................................................................. 30

Speaker.................................................................................................................................................................................31

Removing the speaker.................................................................................................................................................31

Installing the speaker.................................................................................................................................................. 33

Heat sink assemblyassembly...........................................................................................................................................33

Removing the heat sink assembly........................................................................................................................... 33

Installing the heat sink assembly............................................................................................................................. 35

Memory modules............................................................................................................................................................... 35

Removing the memory module.................................................................................................................................35

Installing the memory module................................................................................................................................... 37

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