Dell Inspiron 20-3052 User manual

Inspiron 20
3000 Series
Service Manual
Computer Model: Inspiron 20–3052
Regulatory Model: W15B
Regulatory Type: W15B002

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 - 07
Rev. A00

Contents
Before working inside your computer.....................................9
Before you begin ...............................................................................................9
Safety instructions............................................................................................10
Recommended tools........................................................................................11
After working inside your computer......................................12
Technical overview....................................................................13
Inside view of your computer..........................................................................13
System-board components............................................................................ 14
Removing the stand.................................................................. 16
Procedure.........................................................................................................16
Replacing the stand...................................................................18
Procedure.........................................................................................................18
Removing the optical drive......................................................19
Prerequisites.....................................................................................................19
Procedure.........................................................................................................19
Replacing the optical drive......................................................22
Procedure.........................................................................................................22
Post-requisites................................................................................................. 22
Removing the back cover........................................................ 23
Prerequisites.....................................................................................................23
Procedure.........................................................................................................23
3

Replacing the back cover.........................................................25
Procedure.........................................................................................................25
Post-requisites................................................................................................. 25
Removing the hard drive..........................................................26
Prerequisites.....................................................................................................26
Procedure........................................................................................................ 26
Replacing the hard drive..........................................................29
Procedure........................................................................................................ 29
Post-requisites.................................................................................................29
Removing the memory module..............................................30
Prerequisites.................................................................................................... 30
Procedure........................................................................................................ 30
Replacing the memory module.............................................. 32
Procedure.........................................................................................................32
Post-requisites................................................................................................. 33
Removing the wireless card.................................................... 35
Prerequisites.....................................................................................................35
Procedure.........................................................................................................35
Replacing the wireless card.....................................................37
Procedure.........................................................................................................37
Post-requisites.................................................................................................38
Removing the control-buttons board...................................39
Prerequisites.....................................................................................................39
Procedure........................................................................................................ 39
4

Replacing the control-buttons board................................... 41
Procedure.........................................................................................................41
Post-requisites................................................................................................. 41
Removing the microphone......................................................42
Prerequisites.....................................................................................................42
Procedure........................................................................................................ 42
Replacing the microphone......................................................44
Procedure........................................................................................................ 44
Post-requisites.................................................................................................44
Removing the system-board shield.......................................45
Prerequisites.....................................................................................................45
Procedure........................................................................................................ 45
Replacing the system-board shield....................................... 47
Procedure.........................................................................................................47
Post-requisites................................................................................................. 47
Removing the camera.............................................................. 48
Prerequisites.................................................................................................... 48
Procedure........................................................................................................ 48
Replacing the camera............................................................... 51
Procedure.........................................................................................................51
Post-requisites................................................................................................. 51
Removing the coin-cell battery..............................................52
Prerequisites.....................................................................................................52
Procedure.........................................................................................................52
5

Replacing the coin-cell battery..............................................54
Procedure........................................................................................................ 54
Post-requisites.................................................................................................54
Removing the fan...................................................................... 55
Prerequisites.....................................................................................................55
Procedure.........................................................................................................55
Replacing the fan.......................................................................57
Procedure.........................................................................................................57
Post-requisites................................................................................................. 57
Removing the heat sink............................................................58
Prerequisites.....................................................................................................58
Procedure........................................................................................................ 58
Replacing the heat sink............................................................60
Procedure........................................................................................................ 60
Post-requisites.................................................................................................60
Removing the speakers............................................................ 61
Prerequisites.....................................................................................................61
Procedure.........................................................................................................61
Replacing the speakers............................................................ 63
Procedure........................................................................................................ 63
Post-requisites.................................................................................................63
Removing the system board................................................... 64
Prerequisites.................................................................................................... 64
Procedure........................................................................................................ 64
6

Replacing the system board....................................................67
Procedure.........................................................................................................67
Post-requisites................................................................................................. 67
Removing the display cable.................................................... 68
Prerequisites.................................................................................................... 68
Procedure........................................................................................................ 68
Replacing the display cable.....................................................70
Procedure........................................................................................................ 70
Post-requisites.................................................................................................70
Removing the display assembly..............................................71
Prerequisites..................................................................................................... 71
Procedure......................................................................................................... 71
Replacing the display assembly.............................................. 75
Procedure.........................................................................................................75
Post-requisites................................................................................................. 75
Removing the rubber feet........................................................77
Prerequisites.....................................................................................................77
Procedure.........................................................................................................77
Replacing the rubber feet........................................................ 79
Procedure.........................................................................................................79
Post-requisites................................................................................................. 79
BIOS setup program................................................................. 80
Overview..........................................................................................................80
Entering BIOS setup program.........................................................................80
Clearing Forgotten Passwords........................................................................80
Prerequisites............................................................................................... 81
Procedure...................................................................................................81
7

Post-requisites........................................................................................... 81
Clearing CMOS Settings..................................................................................82
Prerequisites...............................................................................................82
Procedure...................................................................................................82
Post-requisites........................................................................................... 83
Flashing the BIOS...................................................................... 84
8

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 10: Click or tap Start → Power → Shut down.
– 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.
9

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
www.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 www.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.
CAUTION: Press and eject any installed card from the media-card
reader.
10

Recommended tools
The procedures in this document may require the following tools:
• Phillips screwdriver
• Plastic scribe
11

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.
12

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 www.dell.com/regulatory_compliance.
Inside view of your computer
1 speakers (2) 2 hard-drive assembly
3 control-buttons board 4 display assembly
5 fan 6 display-assembly base
7 heat sink 8 wireless card
9 memory module 10 system board
11 coin-cell battery
13

System-board components
1 wireless-card slot (NGFF_WIFI) 2 memory-module slot (DIMM1)
3 camera-cable connector
(WEBCAM) 4 CMOS clear jumper (CMCL R2)
5 Password clear jumper (PSWD) 6 speaker-cable connector
(SPEAKER)
7 coin-cell battery 8 touch-screen board cable
connector (TOUCH)
14

9 control-buttons board cable
connector 10 display-panel power cable connector (PWRCN)
11 display-cable connector 12 hard-drive data cable
connector (SATA_HDD)
13 optical-drive cable connector
(SATA_HDD) 14 hard-drive and optical-drive power cable connector
(SATAP1)
15 fan-cable connector (FAN_CPU)
15

Removing the stand
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 www.dell.com/regulatory_compliance.
Procedure
NOTE: This chapter is applicable only for systems with an easel stand.
For systems with a pedestal stand, refer to the Quick Start Guide that
came with your computer.
1 Using a plastic scribe, pry the stand cover off the back cover.
2 Slide and remove the stand cover from the back cover.
1 stand cover 2 back cover
3 Close the stand and remove the screws that secure the stand to the back
cover.
16

4 Slide and remove the stand from the back cover.
1 screws (2) 2 stand
17

Replacing the stand
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 www.dell.com/regulatory_compliance.
Procedure
NOTE: This chapter is applicable only for systems with an easel stand.
For systems with a pedestal stand, refer to the Quick Start Guide that
came with your computer.
1 Insert the tabs on the stand bracket into the slots on the back cover.
2 Align the screw holes on the stand with the screw holes on the back
cover.
3 Replace the screws that secure the stand to the back cover.
4 Replace the stand cover.
18

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 www.dell.com/regulatory_compliance.
Prerequisites
Remove the stand.
Procedure
1 Using a plastic scribe, push the optical-drive bracket down and then push
it outward.
19

2 Pull the optical-drive assembly out of the optical-drive bay.
1 optical-drive assembly 2 optical-drive bracket
3 plastic scribe
3 Carefully pull the optical-drive bezel and remove it from the optical drive.
4 Remove the screws that secure the optical-drive bracket to the optical
drive.
20