Dell Inspiron 3668 User manual

Inspiron 3668
Service Manual
Computer Model: Inspiron 3668
Regulatory Model: D19M
Regulatory Type: D19M003

Notes, cautions, and warnings
NOTE: A NOTE indicates important information that helps you make
better use of your product.
CAUTION: A CAUTION indicates either potential damage to hardware or
loss of data and tells you how to avoid the problem.
WARNING: A WARNING indicates a potential for property damage,
personal injury, or death.
Copyright ©2017 Dell Inc. or its subsidiaries. All rights reserved. Dell, EMC, and other
trademarks are trademarks of Dell Inc. or its subsidiaries. Other trademarks may be
trademarks of their respective owners.
2017 - 01
Rev. A00

Contents
Before working inside your computer............................ 9
Before you begin ...................................................................................... 9
After working inside your computer............................. 10
Safety instructions........................................................11
Recommended tools.....................................................13
Screw list..................................................................... 14
Inside view of your computer....................................... 15
System board components...........................................16
Removing the computer cover .................................... 18
Procedure................................................................................................18
Replacing the computer cover .....................................19
Procedure................................................................................................19
Removing the front bezel ............................................20
Prerequisites........................................................................................... 20
Procedure................................................................................................21
Replacing the front bezel.............................................23
Procedure............................................................................................... 23
Post-requisites........................................................................................23
3

Removing the memory modules...................................24
Prerequisites........................................................................................... 24
Procedure............................................................................................... 24
Replacing the memory modules................................... 27
Procedure............................................................................................... 27
Post-requisites........................................................................................28
Removing the graphics card........................................ 29
Prerequisites........................................................................................... 29
Procedure............................................................................................... 29
Replacing the graphics card.........................................33
Procedure............................................................................................... 33
Post-requisites........................................................................................33
Removing the 3.5-inch hard drive................................34
Prerequisites........................................................................................... 34
Procedure............................................................................................... 34
Replacing the 3.5-inch hard drive................................ 39
Procedure............................................................................................... 39
Post-requisites........................................................................................39
Removing the 2.5-inch hard drives.............................. 40
Prerequisites........................................................................................... 40
Procedure............................................................................................... 40
Replacing the 2.5-inch hard drives...............................44
Procedure............................................................................................... 44
Post-requisites........................................................................................44
4

Removing the optical drive.......................................... 45
Prerequisites........................................................................................... 45
Procedure............................................................................................... 45
Replacing the optical drive.......................................... 50
Procedure...............................................................................................50
Post-requisites........................................................................................50
Removing the coin-cell battery.................................... 51
Prerequisites............................................................................................51
Procedure................................................................................................51
Replacing the coin-cell battery.................................... 54
Procedure............................................................................................... 54
Post-requisites........................................................................................54
Removing the wireless card.........................................55
Prerequisites...........................................................................................55
Procedure...............................................................................................55
Replacing the wireless card......................................... 58
Procedure............................................................................................... 58
Post-requisites........................................................................................59
Removing the antenna modules...................................60
Prerequisites...........................................................................................60
Procedure............................................................................................... 60
Replacing the antenna modules................................... 63
Procedure............................................................................................... 63
Post-requisites........................................................................................63
5

Removing the power-button module............................64
Prerequisites........................................................................................... 64
Procedure............................................................................................... 64
Replacing the power-button module............................ 67
Procedure............................................................................................... 67
Post-requisites........................................................................................67
Removing the chassis fan............................................ 68
Prerequisites........................................................................................... 68
Procedure............................................................................................... 68
Replacing the chassis fan............................................. 71
Procedure................................................................................................ 71
Post-requisites.........................................................................................71
Removing the power-supply unit..................................72
Prerequisites........................................................................................... 72
Procedure............................................................................................... 72
Replacing the power-supply unit..................................76
Procedure............................................................................................... 76
Post-requisites........................................................................................76
Removing the processor fan........................................ 77
Prerequisites............................................................................................77
Procedure................................................................................................77
Replacing the processor fan........................................ 80
Procedure............................................................................................... 80
Post-requisites........................................................................................80
6

Removing the processor heat-sink............................... 81
Prerequisites............................................................................................81
Procedure................................................................................................81
Replacing the processor heat-sink...............................83
Procedure............................................................................................... 83
Post-requisites........................................................................................83
Removing the system board........................................ 84
Prerequisites........................................................................................... 84
Procedure............................................................................................... 84
Replacing the system board.........................................87
Procedure............................................................................................... 87
Post-requisites........................................................................................ 87
BIOS setup program.................................................... 88
BIOS overview........................................................................................ 88
Entering BIOS setup program................................................................. 88
Clearing Forgotten Passwords................................................................88
Prerequisites..................................................................................... 88
Procedure......................................................................................... 88
Post-requisites..................................................................................90
Clearing CMOS Settings..........................................................................91
Prerequisites......................................................................................91
Procedure..........................................................................................91
Post-requisites..................................................................................93
Flashing the BIOS........................................................ 94
7

Getting help and contacting Dell..................................95
Self-help resources.................................................................................95
Contacting Dell....................................................................................... 95
8

Before working inside your
computer
NOTE: The images in this document may differ from your computer
depending on the configuration you ordered.
Before you begin
1 Save and close all open files and exit all open applications.
2 Shut down your computer. Click Start → Power → Shut down.
NOTE: If you are using a different operating system, see the
documentation of your operating system for shut-down instructions.
3 Disconnect your computer and all attached devices from their electrical outlets.
4 Disconnect all attached network devices and peripherals, such as keyboard,
mouse, and monitor from your computer.
5 Remove any media card and optical disc from your computer, if applicable.
6 After the computer is unplugged, press and hold the power button for 5 seconds
to ground the system board.
9

After working inside your
computer
CAUTION: Leaving stray or loose screws inside your computer may severely
damage your computer.
1 Replace all screws and ensure that no stray screws remain inside your computer.
2 Connect any external devices, peripherals, or cables you removed before
working on your computer.
3 Replace any media cards, discs, or any other parts that you removed before
working on your computer.
4 Connect your computer and all attached devices to their electrical outlets.
5 Turn on your computer.
10