Dell Inspiron 24 3000 series User manual

Inspiron 24
3000 Series
Service Manual
Computer Model: Inspiron 24–3455
Regulatory Model: W12C
Regulatory Type: W12C001

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 ©2015 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.
2015 - 05
Rev. A00

Contents
Before working inside your computer.....................................8
Before you begin ...............................................................................................8
Safety instructions..............................................................................................9
Recommended tools....................................................................................... 10
After working inside your computer...................................... 11
Technical overview....................................................................12
Inside view of your computer..........................................................................12
Removing the stand assembly................................................ 14
Procedure.........................................................................................................14
Replacing the stand assembly.................................................16
Procedure.........................................................................................................16
Removing the back cover.........................................................17
Prerequisites..................................................................................................... 17
Procedure......................................................................................................... 17
Replacing the back cover.........................................................19
Procedure.........................................................................................................19
Post-requisites................................................................................................. 19
Removing the optical drive..................................................... 20
Prerequisites.................................................................................................... 20
Procedure........................................................................................................ 20
Replacing the optical drive......................................................23
Procedure.........................................................................................................23
Post-requisites................................................................................................. 23
3

Removing the hard drive..........................................................24
Prerequisites.....................................................................................................24
Procedure........................................................................................................ 24
Replacing the hard drive.......................................................... 27
Procedure.........................................................................................................27
Post-requisites................................................................................................. 27
Removing the memory module..............................................28
Prerequisites.................................................................................................... 28
Procedure........................................................................................................ 28
Replacing the memory module.............................................. 30
Procedure........................................................................................................ 30
Post-requisites................................................................................................. 31
Removing the wireless card.................................................... 32
Prerequisites.....................................................................................................32
Procedure.........................................................................................................32
Replacing the wireless card.....................................................34
Procedure........................................................................................................ 34
Post-requisites................................................................................................. 35
Removing the heat sink............................................................36
Prerequisites.....................................................................................................36
Procedure........................................................................................................ 36
Replacing the heat sink............................................................38
Procedure........................................................................................................ 38
Post-requisites.................................................................................................38
4

Removing the fan...................................................................... 39
Prerequisites.....................................................................................................39
Procedure........................................................................................................ 39
Replacing the fan.......................................................................41
Procedure.........................................................................................................41
Post-requisites................................................................................................. 41
Removing the coin-cell battery..............................................42
Prerequisites.....................................................................................................42
Procedure........................................................................................................ 43
Replacing the coin-cell battery..............................................44
Procedure........................................................................................................ 44
Post-requisites.................................................................................................44
Removing the microphone......................................................45
Prerequisites.....................................................................................................45
Procedure........................................................................................................ 45
Replacing the microphone......................................................47
Procedure.........................................................................................................47
Post-requisites................................................................................................. 47
Removing the camera.............................................................. 48
Prerequisites.................................................................................................... 48
Procedure........................................................................................................ 48
Replacing the camera...............................................................50
Procedure........................................................................................................ 50
Post-requisites.................................................................................................50
5

Removing the system board....................................................51
Prerequisites..................................................................................................... 51
Procedure.........................................................................................................51
Replacing the system board....................................................54
Procedure........................................................................................................ 54
Post-requisites................................................................................................. 55
Removing the VESA-mount bracket......................................56
Prerequisites.....................................................................................................56
Procedure........................................................................................................ 56
Replacing the VESA-mount bracket...................................... 58
Procedure........................................................................................................ 58
Post-requisites.................................................................................................58
Removing the speaker cover...................................................59
Prerequisites.....................................................................................................59
Procedure........................................................................................................ 59
Replacing the speaker cover................................................... 61
Procedure.........................................................................................................61
Post-requisites................................................................................................. 61
Removing the speakers............................................................ 62
Prerequisites.....................................................................................................62
Procedure........................................................................................................ 62
Replacing the speakers............................................................ 64
Procedure........................................................................................................ 64
Post-requisites.................................................................................................64
6

Removing the control-buttons board...................................65
Prerequisites.....................................................................................................65
Procedure........................................................................................................ 65
Replacing the control-buttons board................................... 67
Procedure.........................................................................................................67
Post-requisites................................................................................................. 67
Removing the display assembly............................................. 68
Prerequisites.................................................................................................... 68
Procedure........................................................................................................ 69
Replacing the display assembly.............................................. 73
Procedure.........................................................................................................73
Post-requisites................................................................................................. 73
Removing the rubber feet........................................................75
Prerequisites.....................................................................................................75
Procedure.........................................................................................................76
Replacing the rubber feet........................................................ 77
Procedure.........................................................................................................77
Post-requisites................................................................................................. 77
Flashing the BIOS...................................................................... 79
7

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.
CAUTION: Place the computer on a flat, soft and clean surface to
avoid scratching the display.
8 Place the computer face down.
8

Safety instructions
Use the following safety guidelines to protect your computer from potential
damage and ensure your personal safety.
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, ensure 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: You should only perform troubleshooting and repairs as
authorized or directed by the Dell technical assistance team. Damage
due to servicing that is not authorized by Dell is not covered by your
warranty. See the safety instructions that shipped with the product or
at dell.com/regulatory_compliance.
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, ensure that the ports and connectors are correctly oriented
and aligned.
9

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:
• Philips screwdriver
• Plastic scribe
10

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, and cables you removed
before working on your computer.
3 Replace any media cards, discs, and 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.
11

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 control-buttons board 2 hard-drive assembly
3 optical-drive assembly 4 display-assembly base
5 microphone board 6 camera module
7 fan 8 heat sink
12

9 wireless card 10 memory module
11 system board 12 coin-cell battery
13 VESA-mount bracket 14 speaker cover
13

Removing the stand assembly
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.
Procedure
1 Using your fingertips, lift the stand cover.
2 Slide and remove the stand cover at an angle away from the stand.
1 stand 2 stand cover
3 back cover
3 Remove the screws that secure the stand bracket to the back cover.
14

4 Lift the stand off the back cover.
1 stand 2 stand bracket
3 screws (2) 4 back cover
15

Replacing the stand assembly
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.
Procedure
1 Insert the tabs on the stand bracket with the slots on the back cover to
align the screw holes on the stand bracket to the screw holes on the
back cover.
2 Replace the screws that secure the stand bracket to the back cover.
3 Slide and replace the stand cover on the stand bracket.
16

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
Remove the stand assembly.
Procedure
CAUTION: Do not remove the computer cover unless you need to
install internal accessories for your computer.
1 Using a plastic scribe, pry the back cover from the display bezel.
17

2 Lift the back cover off the computer.
1 display bezel 2 back cover
3 plastic scribe
18

Replacing 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.
Procedure
Align the tabs on the back cover with the slots on the display bezel and snap
the back cover into place.
Post-requisites
Replace the stand assembly.
19

Removing the optical 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.
Prerequisites
1 Remove the stand assembly.
2 Remove the back cover.
Procedure
1 Disconnect the power and data cable from the optical drive.
2 Remove the screw that secures the optical-drive assembly to the display-
assembly base.
20