Dell Inspiron 20 User manual

Inspiron 20
Service Manual
Computer Model: Inspiron 20 Model 3043
Regulatory Model: W13B
Regulatory Type: W13B001

Notes, Cautions, and Warnings
NOTE: A NOTE indicates important information that helps you make better
use of your computer.
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 ©2014 Dell Inc. All rights reserved. This product is protected by U.S. and
international copyright and intellectual property laws. Dell™and the Dell logo are trademarks
of Dell Inc. in the United States and/or other jurisdictions. All other marks and names
mentioned herein may be trademarks of their respective companies.
2014 - 05
Rev. A00

Contents
Before Working Inside Your Computer.....................................7
Before You Begin .............................................................................................. 7
Safety Instructions..............................................................................................7
Recommended Tools........................................................................................ 8
After Working Inside Your Computer......................................10
Technical Overview...................................................................... 11
Inside View of Your Computer.........................................................................11
System Board Components ............................................................................12
Removing the Hard Drive........................................................... 14
Procedure.........................................................................................................14
Replacing the Hard Drive............................................................18
Procedure.........................................................................................................18
Removing the Back Cover.......................................................... 19
Prerequisites.....................................................................................................19
Procedure........................................................................................................ 20
Replacing the Back Cover..........................................................24
Procedure........................................................................................................ 24
Post-requisites ................................................................................................24
Removing the Control-Buttons Board....................................25
Prerequisites.....................................................................................................25
Procedure.........................................................................................................25

Replacing the Control-Buttons Board....................................27
Procedure.........................................................................................................27
Post-requisites................................................................................................. 27
Removing the Wireless Card..................................................... 28
Prerequisites.................................................................................................... 28
Procedure........................................................................................................ 28
Replacing the Wireless Card..................................................... 30
Procedure........................................................................................................ 30
Post-requisites.................................................................................................30
Removing the Power-Status Light Board...............................31
Prerequisites..................................................................................................... 31
Procedure.........................................................................................................31
Replacing the Power-Status Light Board...............................33
Procedure.........................................................................................................33
Post-requisites ................................................................................................ 33
Removing the Speakers.............................................................. 34
Prerequisites.....................................................................................................34
Procedure ....................................................................................................... 34
Replacing the Speakers...............................................................36
Procedure ....................................................................................................... 36
Post-requisites.................................................................................................36
Removing the System Board......................................................37
Prerequisites.....................................................................................................37
Procedure ....................................................................................................... 38

Replacing the System Board......................................................42
Procedure........................................................................................................ 42
Post-requisites.................................................................................................43
Entering the Service Tag in the BIOS..............................................................43
Removing the Coin-Cell Battery.............................................. 44
Prerequisites.................................................................................................... 44
Procedure........................................................................................................ 45
Replacing the Coin-Cell Battery.............................................. 46
Procedure........................................................................................................ 46
Post-requisites.................................................................................................46
Removing the Memory Module................................................ 47
Prerequisites.....................................................................................................47
Procedure........................................................................................................ 48
Replacing the Memory Module................................................ 49
Procedure........................................................................................................ 50
Post-requisites.................................................................................................50
Removing the Heat Sink..............................................................51
Prerequisites..................................................................................................... 51
Procedure.........................................................................................................52
Replacing the Heat Sink..............................................................53
Procedure.........................................................................................................53
Post-requisites ................................................................................................ 53
Removing the Display Assembly...............................................54
Prerequisites.....................................................................................................54
Procedure........................................................................................................ 54

Replacing the Display Assembly...............................................58
Procedure........................................................................................................ 58
Post-requisites.................................................................................................58
Removing the Antenna............................................................... 59
Prerequisites.....................................................................................................59
Procedure........................................................................................................ 59
Replacing the Antenna................................................................62
Procedure........................................................................................................ 62
Post-requisites.................................................................................................62
Removing the Camera................................................................ 63
Prerequisites.....................................................................................................63
Procedure........................................................................................................ 63
Replacing the Camera.................................................................65
Procedure........................................................................................................ 65
Post-requisites.................................................................................................65
Removing the Display Bezel......................................................66
Prerequisites.................................................................................................... 66
Procedure........................................................................................................ 66
Replacing the Display Bezel...................................................... 68
Procedure........................................................................................................ 68
Post-requisites.................................................................................................68
Flashing the BIOS......................................................................... 69
Getting Help and Contacting Dell........................................... 70
Self-Help Resources........................................................................................70
Contacting Dell................................................................................................70

Before Working Inside Your
Computer
CAUTION: To avoid damaging the components and cards, handle
them by their edges and avoid touching pins and contacts.
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.
– Windows 8.1: On the Start screen, click or tap the power icon →
Shut down.
– Windows 7: Click or tap Start → 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 cables such as telephone cables, network cables and so
on, from your computer.
5 Disconnect all attached devices and peripherals, such as keyboard,
mouse, monitor, and so on, from your computer.
6 Remove any media card and optical disc from your computer, if
applicable.
7 After the computer is unplugged, press and hold the power button for 5
seconds to ground the system board.
Safety Instructions
Use the following safety guidelines to protect your computer from potential
damage and ensure your personal safety.
7

WARNING: Before working inside your computer, read the safety
information that shipped with your computer. For more safety best
practices, see the Regulatory Compliance home page at dell.com/
regulatory_compliance.
WARNING: Disconnect all power sources before opening the
computer cover or panels. After you finish working inside the
computer, replace all covers, panels, and screws before connecting to
the power source.
CAUTION: To avoid damaging the computer, make sure that the work
surface is flat and clean.
CAUTION: To avoid damaging the components and cards, handle
them by their edges and avoid touching pins and contacts.
CAUTION: Only a certified service technician is authorized to remove
the computer cover and access any of the components inside the
computer. See the safety instructions for complete information about
safety precautions, working inside your computer, and protecting
against electrostatic discharge.
CAUTION: Before touching anything inside your computer, ground
yourself by touching an unpainted metal surface, such as the metal at
the back of the computer. While you work, periodically touch an
unpainted metal surface to dissipate static electricity, which could
harm internal components.
CAUTION: When you disconnect a cable, pull on its connector or on
its pull-tab, not on the cable itself. Some cables have connectors with
locking tabs or thumb-screws that you must disengage before
disconnecting the cable. When disconnecting cables, keep them
evenly aligned to avoid bending any connector pins. When connecting
cables, make sure that the ports and connectors are correctly oriented
and aligned.
CAUTION: To disconnect a network cable, first unplug the cable from
your computer and then unplug the cable from the network device.
CAUTION: Press and eject any installed card from the media-card
reader.
Recommended Tools
The procedures in this document may require the following tools:
8

• Philips screwdriver
• Flat-head screwdriver
• Plastic scribe
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 make sure that no stray screws remain inside your
computer.
2 Connect any external devices, peripherals, and cables you removed
before working on your computer.
3 Replace any media cards, discs, and any other part(s) 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

Technical Overview
WARNING: Before working inside your computer, read the safety
information that shipped with your computer and follow the steps in
Before Working Inside Your Computer. After working inside your
computer, follow the instructions in After Working Inside Your
Computer. For more safety best practices, see the Regulatory
Compliance home page at dell.com/regulatory_compliance.
Inside View of Your Computer
1 back cover 2 hard-drive assembly
3 display panel 4 speakers (2)
5 power-status light board 6 system-board bracket
7 wireless card 8 antenna modules (2)
9 control-buttons board
11

System Board Components
1 memory-module slot (DDR3L) 2 hard-drive cable connector
(HDD)
3 wireless-card slot (WLAN) 4 display-backlight cable
connector
5 display-cable connector (LVDS) 6 speaker-cable connector (SPK)
7 power-status light board cable
connector (LED)
12

1 camera and control-buttons
board cable connector 2 coin-cell battery cable connector
3 coin-cell battery
13

Removing the Hard Drive
WARNING: Before working inside your computer, read the safety
information that shipped with your computer and follow the steps in
Before Working Inside Your Computer. After working inside your
computer, follow the instructions in After Working Inside Your
Computer. For more safety best practices, see the Regulatory
Compliance home page at dell.com/regulatory_compliance.
CAUTION: Hard drives are fragile. Exercise care when handling the
hard drive.
CAUTION: To avoid data loss, do not remove the hard drive while the
computer is in Sleep or On state.
Procedure
1 Place the computer face down on a flat and clean surface.
2 Using your fingertips, pry the hard-drive door off the back cover.
1 hard-drive door 2 back cover
3 Using the pull tab, disconnect the hard-drive cable from the interposer
board.
4 Remove the screws that secure the hard-drive assembly to the back
cover.
14

5 Lift and slide the hard-drive assembly out of the slot on the back cover.
1 hard-drive assembly 2 screws (4)
3 pull tab 4 hard-drive cable
5 interposer board
6 Turn the hard-drive assembly over.
15

7 Peel off the tape that secures the interposer board to the hard-drive
assembly.
1 hard-drive assembly 2 interposer board
3 tape
8 Turn the hard-drive assembly over.
9 Pull the interposer board to disconnect it from the hard-drive assembly.
10 Remove the screws that secure the hard-drive bracket to the hard drive.
16

11 Lift the hard-drive bracket off the hard drive.
1 interposer board 2 screws (4)
3 hard drive 4 hard-drive bracket
17

Replacing the Hard Drive
WARNING: Before working inside your computer, read the safety
information that shipped with your computer and follow the steps in
Before Working Inside Your Computer. After working inside your
computer, follow the instructions in After Working Inside Your
Computer. For more safety best practices, see the Regulatory
Compliance home page at dell.com/regulatory_compliance.
CAUTION: Hard drives are fragile. Exercise care when handling the
hard drive.
Procedure
1 Align the screw holes on the hard-drive bracket with the screw holes on
the hard drive.
2 Replace the screws that secure the hard-drive bracket to the hard drive.
3 Connect the interposer board to the hard-drive assembly.
4 Turn the hard-drive assembly over.
5 Adhere the tape to the interposer board and hard-drive assembly.
6 Turn the hard-drive assembly over.
7 Slide the hard-drive assembly into the slot on the back cover.
8 Align the screw holes on the hard-drive assembly with the screw holes
on the back cover.
9 Replace the screws that secure the hard-drive assembly to the back
cover.
10 Connect the hard-drive cable to the interposer board.
11 Slide the tabs on the hard-drive door into the slots on the back cover and
snap the hard-drive door into place.
12 Place the computer in an upright position.
18

Removing the Back Cover
WARNING: Before working inside your computer, read the safety
information that shipped with your computer and follow the steps in
Before Working Inside Your Computer. After working inside your
computer, follow the instructions in After Working Inside Your
Computer. For more safety best practices, see the Regulatory
Compliance home page at dell.com/regulatory_compliance.
Prerequisites
Follow the procedure from step 1 to step 5 in “Removing the Hard Drive”.
19

Procedure
1 Slide the tabs on the hard-drive door into the slots on the back cover and
snap the hard-drive door into place.
2 Remove the screws that secure the back cover to the display bezel.
1 screws (4) 2 back cover
3 notch
20