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Inspiron 20
3000 Series
Service Manual
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 © 2016 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.
2016 - 03
Rev. A00
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Contents |
1 Before working inside your computer |
......................................... 8 |
Before you begin ............................................................................. |
8 |
Safety instructions............................................................................ |
9 |
Recommended tools..................................................................... |
10 |
2 After working inside your computer.......................................... |
11 |
3 Technical overview........................................................................ |
12 |
Inside view of your computer...................................................... |
13 |
System-board components......................................................... |
14 |
4 Removing the stand...................................................................... |
16 |
Procedure........................................................................................ |
16 |
5 Replacing the stand....................................................................... |
18 |
Procedure........................................................................................ |
18 |
6 Removing the back cover............................................................. |
19 |
Prerequisites.................................................................................... |
19 |
Procedure........................................................................................ |
19 |
7 Replacing the back cover............................................................. |
21 |
Procedure........................................................................................ |
21 |
Post-requisites................................................................................ |
21 |
8 Removing the battery................................................................... |
22 |
Prerequisites.................................................................................... |
22 |
Procedure........................................................................................ |
22 |
9 Replacing the battery.................................................................... |
25 |
Procedure........................................................................................ |
25 |
3000 Series |
3 |
|
|
Post-requisites................................................................................ |
25 |
10 Removing the hard drive............................................................ |
26 |
Prerequisites.................................................................................... |
26 |
Procedure........................................................................................ |
26 |
11 Replacing the hard drive............................................................ |
29 |
Procedure........................................................................................ |
29 |
Post-requisites................................................................................ |
29 |
12 Removing the memory module................................................. |
31 |
Prerequisites.................................................................................... |
31 |
Procedure........................................................................................ |
31 |
13 Replacing the memory module................................................. |
33 |
Procedure........................................................................................ |
33 |
Post-requisites................................................................................ |
34 |
14 Removing the system-board shield......................................... |
35 |
Prerequisites.................................................................................... |
35 |
Procedure........................................................................................ |
35 |
15 Replacing the system-board shield.......................................... |
37 |
Procedure........................................................................................ |
37 |
Post-requisites................................................................................ |
37 |
16 Removing the wireless card...................................................... |
38 |
Prerequisites.................................................................................... |
38 |
Procedure........................................................................................ |
38 |
17 Replacing the wireless card....................................................... |
40 |
Procedure........................................................................................ |
40 |
Post-requisites................................................................................ |
41 |
3000 Series |
4 |
|
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18 Removing the control-buttons board..................................... |
42 |
Prerequisites.................................................................................... |
42 |
Procedure........................................................................................ |
42 |
19 Replacing the control-buttons board..................................... |
44 |
Procedure........................................................................................ |
44 |
Post-requisites............................................................................... |
44 |
20 Removing the microphone....................................................... |
45 |
Prerequisites.................................................................................... |
45 |
Procedure........................................................................................ |
45 |
21 Replacing the microphone........................................................ |
47 |
Procedure........................................................................................ |
47 |
Post-requisites................................................................................ |
47 |
22 Removing the camera................................................................ |
48 |
Prerequisites................................................................................... |
48 |
Procedure........................................................................................ |
48 |
23 Replacing the camera................................................................. |
51 |
Procedure........................................................................................ |
51 |
Post-requisites................................................................................ |
51 |
24 Removing the coin-cell battery................................................ |
52 |
Prerequisites.................................................................................... |
52 |
Procedure........................................................................................ |
52 |
25 Replacing the coin-cell battery................................................ |
54 |
Procedure........................................................................................ |
54 |
Post-requisites................................................................................ |
54 |
26 Removing the heat sink.............................................................. |
55 |
3000 Series |
5 |
|
|
Prerequisites.................................................................................... |
55 |
Procedure........................................................................................ |
55 |
27 Replacing the heat sink.............................................................. |
57 |
Procedure........................................................................................ |
57 |
Post-requisites................................................................................ |
57 |
28 Removing the speakers.............................................................. |
58 |
Prerequisites.................................................................................... |
58 |
Procedure........................................................................................ |
58 |
29 Replacing the speakers.............................................................. |
60 |
Procedure........................................................................................ |
60 |
Post-requisites............................................................................... |
60 |
30 Removing the system board...................................................... |
61 |
Prerequisites.................................................................................... |
61 |
Procedure........................................................................................ |
62 |
31 Replacing the system board...................................................... |
64 |
Procedure........................................................................................ |
64 |
Post-requisites................................................................................ |
65 |
32 Removing the display cable...................................................... |
66 |
Prerequisites................................................................................... |
66 |
Procedure........................................................................................ |
66 |
33 Replacing the display cable....................................................... |
68 |
Procedure........................................................................................ |
68 |
Post-requisites............................................................................... |
68 |
34 Removing the display assembly............................................... |
69 |
Prerequisites................................................................................... |
69 |
Procedure........................................................................................ |
70 |
3000 Series |
6 |
|
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35 Replacing the display assembly................................................ |
73 |
Procedure........................................................................................ |
73 |
Post-requisites................................................................................ |
73 |
36 Removing the rubber feet.......................................................... |
75 |
Prerequisites.................................................................................... |
75 |
Procedure........................................................................................ |
75 |
37 Replacing the rubber feet........................................................... |
77 |
Procedure........................................................................................ |
77 |
Post-requisites................................................................................ |
77 |
38 BIOS setup program.................................................................... |
78 |
Overview.......................................................................................... |
78 |
Entering BIOS setup program..................................................... |
78 |
Clearing forgotten passwords..................................................... |
79 |
Prerequisites.............................................................................. |
79 |
Procedure.................................................................................. |
79 |
Post-requisites.......................................................................... |
80 |
Clearing CMOS settings............................................................... |
80 |
Prerequisites............................................................................. |
80 |
Procedure.................................................................................. |
80 |
Post-requisites.......................................................................... |
81 |
39 Flashing the BIOS........................................................................ |
82 |
3000 Series |
7 |
|
|
1
Before working inside your computer
NOTE: The images in this document may differ from your computer depending on the configuration you ordered.
Topics:
•Before you begin
•Safety instructions
•Recommended tools
Before you begin
1Save and close all open files and exit all open applications.
2Shut 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.
3Disconnect your computer and all attached devices from their electrical outlets.
4Disconnect all cables such as telephone cables, network cables, and so on, from your computer.
5Disconnect all attached devices and peripherals, such as keyboard, mouse, monitor, and so on, from your computer.
6Remove any media card and optical disc from your computer, if applicable.
7After the computer is unplugged, press and hold the power button for 5 seconds to ground the system board.
Before working inside your computer |
8 |
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CAUTION: Place the computer on a flat, soft, and clean surface to avoid scratches on the display.
8 Place the computer face down.
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 electrical outlet.
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.
Before working inside your computer |
9 |
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Recommended tools
The procedures in this document may require the following tools:
•Phillips screwdriver
•Plastic scribe
Before working inside your computer |
10 |
|
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2
After working inside your computer
CAUTION: Leaving stray or loose screws inside your computer may severely damage your computer.
1Replace all screws and ensure that no stray screws remain inside your computer.
2Connect any external devices, peripherals, or cables you removed before working on your computer.
3Replace any media cards, discs, or any other parts that you removed before working on your computer.
4Connect your computer and all attached devices to their electrical outlets.
5Turn on your computer.
After working inside your computer |
11 |
|
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3
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.
Topics:
•Inside view of your computer
•System-board components
Technical overview |
12 |
|
|
Inside view of your computer
1 |
speakers (2) |
2 |
hard-drive assembly |
3 |
control-buttons board |
4 |
battery assembly |
5 |
display assembly |
6 |
display-assembly base |
7 |
system board |
8 |
heat sink |
9 |
wireless card |
10 |
memory module |
11 |
coin-cell battery |
|
|
Technical overview |
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) |
Technical overview |
14 |
|
|
7 |
coin-cell battery |
8 |
touch-screen board cable |
|
|
|
connector (TOUCH) |
9 |
control-buttons board cable |
10 |
display-panel power cable |
|
connector |
|
connector (PWRCN) |
11 |
battery-cable connector |
12 |
display-cable connector |
13 |
hard-drive data cable connector |
14 |
hard-drive power cable connector |
|
(SATA_HDD) |
|
(SATAP1) |
Technical overview |
15 |
|
|
4
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
1Using a plastic scribe, pry the stand cover off the back cover.
2Slide and remove the stand cover from the back cover.
1 |
stand cover |
2 back cover |
3 |
plastic scribe |
|
Removing the stand |
16 |
|
|
3Close the stand and remove the screws that secure the stand to the back cover.
4Slide and remove the stand from the back cover.
1 screws (2) |
2 stand |
Removing the stand |
17 |
|
|
5
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
1Insert the tabs on the stand bracket into the slots on the back cover.
2Align the screw holes on the stand with the screw holes on the back cover.
3Replace the screws that secure the stand to the back cover.
4Replace the stand cover.
Replacing the stand |
18 |
|
|
6
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 www.dell.com/ regulatory_compliance.
Topics:
•Prerequisites
•Procedure
Prerequisites
Remove the stand.
Procedure
CAUTION: Do not remove the computer cover unless you need to install or replace internal components on your computer.
1Starting from the stand assembly bay, pry off the back cover.
2Lift the back cover off the computer.
Removing the back cover |
19 |
|
|
1 back cover
Removing the back cover |
20 |
|
|
7
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 www.dell.com/ regulatory_compliance.
Topics:
•Procedure
•Post-requisites
Procedure
Align the tabs on the back cover with the slots on the display bezel and snap the back cover into place.
NOTE: Make sure that no cables are caught between the back cover and the display bezel.
Post-requisites
Replace the stand.
Replacing the back cover |
21 |
|
|
8
Removing the battery
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.
Topics:
•Prerequisites
•Procedure
Prerequisites
1Remove the stand.
2Remove the back cover.
Procedure
1Disconnect the battery cable from the battery assembly.
2Remove the screws that secure the battery assembly to the display-assembly base.
3Slide and lift the battery assembly off the display-assembly base.
Removing the battery |
22 |
|
|
1 |
battery cable |
2 screws (4) |
3 |
battery assembly |
|
4 Remove the battery from the battery bracket.
Removing the battery |
23 |
|
|
1 |
battery |
2 battery bracket |
5Turn the computer over.
6Press and hold the power button for 5 seconds, to ground the system board.
Removing the battery |
24 |
|
|
9
Replacing the battery
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.
Topics:
•Procedure
•Post-requisites
Procedure
1Align the battery with the battery bracket and snap it in place.
2Align the screw holes on the battery assembly with the screw holes on the display-assembly base.
3Replace the screws that secure the battery assembly to the display-assembly base.
4Connect the battery cable to the battery assembly.
Post-requisites
1Replace the back cover.
2Replace the stand.
Replacing the battery |
25 |
|
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