Dell Inspiron 14 3420 User manual

Dell Inspiron M4040/14-N4050/
3520 Owner’s Manual
Regulatory model: P22G Regulatory type: P22G001; P22G002

Notes, Cautions, and Warnings
NOTE: A NOTE indicates important information that helps you make better use of
your computer.
CAUTION: A CAUTION indicates potential damage to hardware or loss of data if
instructions are not followed.
WARNING: A WARNING indicates a potential for property damage, personal
injury, or death.
____________________
© 2011-2012 Dell Inc. All rights reserved.
Trademarks used in this text: Dell™, the DELL logo, and Inspiron™are trademarks of Dell Inc.;
Bluetooth®is a registered trademark owned by Bluetooth SIG, Inc.; Microsoft®, Windows®, and the
Windowsstartbuttonlogo areeithertrademarksorregisteredtrademarksofMicrosoftCorporation
in the United States and/or other countries.
Regulatory model: P22G Regulatory type: P22G001; P22G002
2012 - 10 Rev. A01

Contents 3
Contents
1 Before You Begin. . . . . . . . . . . . . . . . . . . . 9
Recommended Tools. . . . . . . . . . . . . . . . . . . . 9
Turning Off Your Computer. . . . . . . . . . . . . . . . 10
Before Working Inside Your Computer . . . . . . . . . 10
2Battery. . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Removing the Battery . . . . . . . . . . . . . . . . . . 13
Replacing the Battery . . . . . . . . . . . . . . . . . . 14
3 Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . 15
Removing the Keyboard . . . . . . . . . . . . . . . . . 15
Replacing the Keyboard . . . . . . . . . . . . . . . . . 17
4 Memory Module(s) . . . . . . . . . . . . . . . . . 19
Removing the Memory Module(s) . . . . . . . . . . . . 19
Replacing the Memory Module(s). . . . . . . . . . . . 20

4Contents
5 Optical Drive . . . . . . . . . . . . . . . . . . . . . 23
Removing the Optical Drive . . . . . . . . . . . . . . . 23
Replacing the Optical Drive . . . . . . . . . . . . . . . 24
6 Palm-Rest Assembly . . . . . . . . . . . . . . . 25
Removing the Palm-Rest Assembly . . . . . . . . . . . 25
Replacing the Palm-Rest Assembly . . . . . . . . . . . 28
7 Power Button Board . . . . . . . . . . . . . . . 31
Removing the Power Button Board . . . . . . . . . . . 31
Replacing the Power Button Board . . . . . . . . . . . 32
8HardDrive. . . . . . . . . . . . . . . . . . . . . . . 33
Removing the Hard Drive . . . . . . . . . . . . . . . . 33
Replacing the Hard Drive . . . . . . . . . . . . . . . . 35
9 Wireless Mini-Card . . . . . . . . . . . . . . . . 37
Removing the Mini-Card . . . . . . . . . . . . . . . . . 37
Replacing the Mini-Card. . . . . . . . . . . . . . . . . 38

Contents 5
10 Audio Board. . . . . . . . . . . . . . . . . . . . . . . 41
Removing the Audio Board . . . . . . . . . . . . . . . 41
Replacing the Audio Board . . . . . . . . . . . . . . . 42
11 Coin-Cell Battery . . . . . . . . . . . . . . . . . . . 43
Removing the Coin-Cell Battery . . . . . . . . . . . . . 43
Replacing the Coin-Cell Battery. . . . . . . . . . . . . 45
12 USB Board . . . . . . . . . . . . . . . . . . . . . . . . 47
Removing the USB Board . . . . . . . . . . . . . . . . 47
Replacing the USB Board . . . . . . . . . . . . . . . . 48
13 Thermal Cooling Assembly . . . . . . . . . . . 49
Removing the Thermal Cooling Assembly . . . . . . . 49
Replacing the Thermal Cooling Assembly . . . . . . . 50
14 Processor Module
(For Inspiron 14-N4050 Only) . . . . . . . . . 51
Removing the Processor Module . . . . . . . . . . . . 51
Replacing the Processor Module . . . . . . . . . . . . 52

6Contents
15 Hinge Cover . . . . . . . . . . . . . . . . . . . . . . 55
Removing the Hinge Cover. . . . . . . . . . . . . . . . 55
Replacing the Hinge Cover . . . . . . . . . . . . . . . 57
16 Display . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Display Assembly . . . . . . . . . . . . . . . . . . . . 59
Removing the Display Assembly . . . . . . . . . . 59
Replacing the Display Assembly . . . . . . . . . . 61
Display Bezel. . . . . . . . . . . . . . . . . . . . . . . 62
Removing the Display Bezel . . . . . . . . . . . . 62
Replacing the Display Bezel . . . . . . . . . . . . 63
Removing the Display Panel . . . . . . . . . . . . 63
Replacing the Display Panel . . . . . . . . . . . . 66
17 Camera Module . . . . . . . . . . . . . . . . . . . 69
Removing the Camera Module. . . . . . . . . . . . . . 69
Replacing the Camera Module . . . . . . . . . . . . . 70
18 System Board . . . . . . . . . . . . . . . . . . . . . 73
Removing the System Board . . . . . . . . . . . . . . . 73
Replacing the System Board . . . . . . . . . . . . . . . 75
Entering the Service Tag in the BIOS . . . . . . . . . . 76
19 Flashing the BIOS . . . . . . . . . . . . . . . . . 77

Contents 7

8Contents

Before You Begin 9
1
Before You Begin
This manual provides procedures for removing and installing components in
your computer. Before you begin any procedure in this book, ensure that:
• You have performed the steps in "Turning Off Your Computer" on page 10
and "Before Working Inside Your Computer" on page 10.
• You have read the safety information that shipped with your computer
.
• A component can be replaced or—if purchased separately—installed by
performing the removal procedure in the reverse order.
Recommended Tools
The procedures in this document may require the following tools:
• Small flat-blade screwdriver
•Phillipsscrewdriver
•Plasticscribe
• BIOS executable update program available at
support.dell.com

10 Before You Begin
Turning Off Your Computer
CAUTION: To avoid losing data, save and close all open files and exit all open
programs before you turn off your computer.
1 Save and close all open files and exit all open programs.
2 Shut down your computer.
•Windows8
Move your mouse pointer to the upper-right or lower-right corner of
the screen to open the Charms sidebar, and then click
Settings →
Power → Shut down .
•Windows7
Click Start and then click Shut Down .
The computer turns off after the operating system shutdown process is
completed.
NOTE: If you are using a different operating system, see the documentation of
your operating system for shut-down instructions.
3 Ensure that the computer is turned off. If your computer did not
automatically turn off when you shut down the operating system, press
and hold the power button until the computer turns off.
Before Working Inside Your Computer
Use the following safety guidelines to help protect your computer from
potential damage and to ensure your own personal safety.
WARNING: Before working inside your computer, read the safety information
that shipped with your computer. For additional safety best practices information,
see the Regulatory Compliance Homepage at
www.dell.com/regulatory_compliance.
CAUTION: To avoid electrostatic discharge, ground yourself by using a wrist
grounding strap or by periodically touching an unpainted metal surface (such as a
connector on your computer).
CAUTION: Handle components and cards with care. Do not touch the components
or contacts on a card. Hold a card by its edges or by its metal mounting bracket.
Hold a component such as a processor by its edges, not by its pins.