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Dell Inspiron 3420 Owner's Manual
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Dell Inspiron 3420 Owner's Manual

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

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Table of Contents
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Summary of Contents for Dell Inspiron 3420

  • Page 1 Dell Inspiron M4040/ 14-N4050 Owner’s Manual Regulatory model: P22G Regulatory type: P22G001; P22G002...
  • Page 2 Information in this document is subject to change without notice. © 2011 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...

  • Page 3: Table Of Contents

    Contents Before You Begin ....Recommended Tools ....Turning Off Your Computer .
  • Page 4 Replacing the Optical Drive ....Palm-Rest Assembly ....Removing the Palm-Rest Assembly .
  • Page 5 11 Coin-Cell Battery ....Removing the Coin-Cell Battery ... . . Replacing the Coin-Cell Battery .
  • Page 6 Removing the Display Assembly ..Replacing the Display Assembly ..Display Bezel ..... . . Removing the Display Bezel .
  • Page 7 Contents...
  • Page 8 Contents...

  • Page 9: Before You Begin

    • Phillips screwdriver • Plastic scribe • BIOS executable update program available at support.dell.com 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.

  • Page 10: Before Working Inside Your Computer

    Hold a component such as a processor by its edges, not by its pins. CAUTION: Only a certified service technician should perform repairs on your computer. Damage due to servicing that is not authorized by Dell is not covered by your warranty. CAUTION: When you disconnect a cable, pull on its connector or on its pull-tab, not on the cable itself.
  • Page 11 6 Disconnect all attached devices from your computer. CAUTION: To help prevent damage to the system board, remove the main battery (see "Removing the Battery" on page 13) before working inside the computer. 7 Remove the battery (see "Removing the Battery" on page 13). 8 Turn the computer top-side up, open the display, and press the power button to ground the system board.
  • Page 12 Before You Begin...

  • Page 13: Battery

    CAUTION: Only a certified service technician should perform repairs on your computer. Damage due to servicing that is not authorized by Dell is not covered by your warranty. 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).

  • Page 14: Replacing The Battery

    battery release latch battery battery lock latch Replacing the Battery 1 Follow the instructions in "Before You Begin" on page 9. 2 Slide the battery into the battery bay until it clicks into place. 3 Slide the battery lock latch to the lock position. Battery...

  • Page 15: Keyboard

    CAUTION: Only a certified service technician should perform repairs on your computer. Damage due to servicing that is not authorized by Dell is not covered by your warranty. 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).
  • Page 16 plastic scribe tabs (4) keyboard CAUTION: Be extremely careful when removing and handling the keyboard. Failure to do so could result in scratching the display panel. 5 Without pulling hard on the keyboard, hold it towards the display. 6 Lift the connector latch that secures the keyboard cable to the connector on the system board and remove the keyboard cable.

  • Page 17: Replacing The Keyboard

    keyboard cable keyboard Replacing the Keyboard 1 Follow the instructions in "Before You Begin" on page 9. 2 Slide the keyboard cable into the connector on the system board. Press down on the connector latch to secure the keyboard cable to the connector on the system board.
  • Page 18 Keyboard...

  • Page 19: Memory Module(S)

    CAUTION: Only a certified service technician should perform repairs on your computer. Damage due to servicing that is not authorized by Dell is not covered by your warranty. 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).

  • Page 20: Replacing The Memory Module(S)

    memory-module connector securing clips (2) memory module Replacing the Memory Module(s) CAUTION: If you need to install memory modules in two connectors, install a memory module in the connector labeled “DIMM A” before you install a memory module in the connector labeled “DIMM B.” 1 Follow the instructions in "Before You Begin"...
  • Page 21 notch 4 Replace the keyboard (see "Replacing the Keyboard" on page 17). 5 Replace the battery (see "Replacing the Battery" on page 14), or connect the AC adapter to your computer and an electrical outlet. 6 Turn on the computer. As the computer boots, it detects the memory module(s) and automatically updates the system configuration information.
  • Page 22 Memory...

  • Page 23: Optical Drive

    CAUTION: Only a certified service technician should perform repairs on your computer. Damage due to servicing that is not authorized by Dell is not covered by your warranty. 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).

  • Page 24: Replacing The Optical Drive

    plastic scribe screw optical drive notch Replacing the Optical Drive 1 Follow the instructions in "Before You Begin" on page 9. 2 Slide the optical drive into the optical-drive compartment until it is fully seated. 3 Replace the screw that secures the optical drive to the computer base. 4 Replace the keyboard (see "Replacing the Keyboard"...

  • Page 25: Palm-Rest Assembly

    CAUTION: Only a certified service technician should perform repairs on your computer. Damage due to servicing that is not authorized by Dell is not covered by your warranty. 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).
  • Page 26 4 Remove the keyboard (see "Removing the Keyboard" on page 15). 5 Remove the three screws on the palm-rest assembly. CAUTION: Pull on the plastic tab on top of the connectors to avoid damaging the connectors. 6 Lift the connector latch that secures the power-button board cable and touch-pad cable to the connectors on the system board and remove the cables.
  • Page 27 power-button board cable touch-pad cable CAUTION: Carefully separate the palm rest from the computer base to avoid damage to the palm rest. 7 Using a plastic scribe, carefully pry out the palm-rest assembly and then ease the palm-rest assembly from the computer base 8 Lift the palm-rest assembly off the computer base.

  • Page 28: Replacing The Palm-Rest Assembly

    palm-rest assembly plastic scribe 9 Remove the power button board (see "Removing the Power Button Board" on page 31). Replacing the Palm-Rest Assembly 1 Follow the instructions in "Before You Begin" on page 9. 2 Replace the power button board (see "Replacing the Power Button Board" on page 32).
  • Page 29 8 Replace the battery (see "Replacing the Battery" on page 14). CAUTION: Before turning on the computer, replace all screws and ensure that no stray screws remain inside the computer. Failure to do so may result in damage to the computer. Palm-Rest Assembly...
  • Page 30 Palm-Rest Assembly...

  • Page 31: Power Button Board

    CAUTION: Only a certified service technician should perform repairs on your computer. Damage due to servicing that is not authorized by Dell is not covered by your warranty. 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).

  • Page 32: Replacing The Power Button Board

    tabs (2) power button board screw Replacing the Power Button Board 1 Follow the instructions in "Before You Begin" on page 9. 2 Slide the power button board under the tabs on the palm rest and align the screw hole on the power button board with the screw hole on the palm rest. 3 Replace the screw that secures the power button board to the palm rest.

  • Page 33: Hard Drive

    CAUTION: Only a certified service technician should perform repairs on your computer. Damage due to servicing that is not authorized by Dell is not covered by your warranty. 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).
  • Page 34 4 Slide the hard-drive assembly to the left to disconnect it from the connector on the system board. 5 Lift the hard-drive assembly out of the computer base. hard-drive assembly 6 Remove the two screws that secure the hard-drive bracket to the hard drive.

  • Page 35: Replacing The Hard Drive

    hard drive screws (2) hard-drive bracket Replacing the Hard Drive 1 Follow the instructions in "Before You Begin" on page 9. 2 Remove the new hard drive from its packaging. Save the original packaging for storing or shipping the hard drive. 3 Place the hard-drive bracket on the hard drive.
  • Page 36 Hard Drive...

  • Page 37: Wireless Mini-Card

    CAUTION: Only a certified service technician should perform repairs on your computer. Damage due to servicing that is not authorized by Dell is not covered by your warranty. 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).

  • Page 38: Replacing The Mini-Card

    6 Lift the Mini-Card out of the connector on the system board. CAUTION: When the Mini-Card is not in the computer, store it in protective antistatic packaging. For more information, see "Protecting Against Electrostatic Discharge" in the safety information that shipped with your computer. Mini-Card antenna cables (2) Replacing the Mini-Card 1 Follow the instructions in "Before You Begin"...
  • Page 39 Failure to do so may result in damage to the computer. 8 Install the drivers and utilities for your computer, as required. NOTE: If you are installing a Mini-Card from a source other than Dell, you must install the appropriate drivers and utilities. Wireless Mini-Card...
  • Page 40 Wireless Mini-Card...

  • Page 41: Audio Board

    CAUTION: Only a certified service technician should perform repairs on your computer. Damage due to servicing that is not authorized by Dell is not covered by your warranty. CAUTION: To help prevent damage to the system board, remove the main battery (see "Removing the Battery"...

  • Page 42: Replacing The Audio Board

    audio-board cable audio board Replacing the Audio Board 1 Follow the instructions in "Before You Begin" on page 9. 2 Use the alignment posts on the computer base to place the audio board in place and press the audio board until it clicks into place. 3 Slide the audio-board cable into the connector on the system board.

  • Page 43: Coin-Cell Battery

    CAUTION: Only a certified service technician should perform repairs on your computer. Damage due to servicing that is not authorized by Dell is not covered by your warranty. 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).
  • Page 44 battery socket coin-cell battery coin-cell battery cable audio-board cable For Inspiron M4040: Using a plastic scribe, gently pry the coin-cell out of the battery socket on the system board. Lift the coin-cell battery out of the battery socket on the system board.

  • Page 45: Replacing The Coin-Cell Battery

    plastic scribe coin-cell battery Replacing the Coin-Cell Battery 1 Follow the instructions in "Before You Begin" on page 9. For Inspiron M4040: With the positive side up, snap the coin-cell battery into the battery socket on the system board. For Inspiron 14-N4050: Slide the coin-cell battery into the battery socket on the computer base.
  • Page 46 Coin-Cell Battery...

  • Page 47: Usb Board

    CAUTION: Only a certified service technician should perform repairs on your computer. Damage due to servicing that is not authorized by Dell is not covered by your warranty. CAUTION: To help prevent damage to the system board, remove the main battery (see "Removing the Battery"...

  • Page 48: Replacing The Usb Board

    screw USB board USB-board cable Replacing the USB Board 1 Follow the procedures in "Before You Begin" on page 9. 2 Slide the connectors on the USB board into the slots on the computer base and align the screw hole on USB board with the screw hole on the computer base.

  • Page 49: Thermal Cooling Assembly

    CAUTION: Only a certified service technician should perform repairs on your computer. Damage due to servicing that is not authorized by Dell is not covered by your warranty. 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).

  • Page 50: Replacing The Thermal Cooling Assembly

    thermal cooling assembly fan cable captive screws (4) Replacing the Thermal Cooling Assembly 1 Follow the instructions in "Before You Begin" on page 9. 2 Align the four captive screws on the thermal cooling assembly with the screw holes on the system board. 3 Tighten the four captive screws that secure the thermal cooling assembly to the system board.

  • Page 51: Processor Module (For Inspiron 14-N4050 Only)

    CAUTION: Only a certified service technician should perform repairs on your computer. Damage due to servicing that is not authorized by Dell is not covered by your warranty. 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).

  • Page 52: Replacing The Processor Module

    CAUTION: When removing the processor module, pull the module straight up. Be careful not to bend the pins on the processor module. 6 Lift the processor module from the ZIF socket. ZIF socket ZIF-socket cam screw Replacing the Processor Module 1 Follow the instructions in "Before You Begin"...
  • Page 53 2 Align the pin-1 corner of the processor module with the pin-1 corner of the ZIF socket, then insert the processor module. NOTE: The pin-1 corner of the processor module has a triangle that aligns with the triangle on the pin-1 corner of the ZIF socket. When the processor module is properly seated, all four corners are aligned at the same height.
  • Page 54 Processor Module (For Inspiron 14-N4050 Only)

  • Page 55: Hinge Cover

    CAUTION: Only a certified service technician should perform repairs on your computer. Damage due to servicing that is not authorized by Dell is not covered by your warranty. 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).
  • Page 56 4 Turn the computer over. 5 Pry the hinge cover off the computer base. Hinge Cover...

  • Page 57: Replacing The Hinge Cover

    hinge cover Replacing the Hinge Cover 1 Follow the instructions in "Before You Begin" on page 9. 2 Align the tabs on the hinge cover with the slots on the computer base and snap the hinge cover into place. 3 Turn the computer over. 4 Replace the two screws that secure the hinge cover to the computer base.
  • Page 58 Hinge Cover...

  • Page 59: Display

    CAUTION: Only a certified service technician should perform repairs on your computer. Damage due to servicing that is not authorized by Dell is not covered by your warranty. 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).
  • Page 60 display cable Mini-Card Mini-Card antenna cables 10 Remove the two screws that secure the display assembly to the computer base. 11 Lift and remove the display assembly out of the computer base. Display...

  • Page 61: Replacing The Display Assembly

    display assembly screws (2) Replacing the Display Assembly 1 Follow the instructions in "Before You Begin" on page 9. 2 Place the display assembly in position and replace the two screws that secure the display assembly to the computer base. 3 Route the display cable and Mini-Card antenna cables through the routing guides.

  • Page 62: Display Bezel

    9 Follow the instructions from step 3 to step 7 in "Replacing the Palm-Rest Assembly" on page 28. 10 Replace the battery (see "Replacing the Battery" on page 14). CAUTION: Before turning on the computer, replace all screws and ensure that no stray screws remain inside the computer.

  • Page 63: Replacing The Display Bezel

    display bezel Replacing the Display Bezel 1 Follow the instructions in "Before You Begin" on page 9. 2 Realign the display bezel over the display panel and gently snap into place. 3 Replace the display assembly (see "Replacing the Display Assembly" on page 61).
  • Page 64 display cable display cover display panel Mini-Card antenna cables screws (6) 7 Remove the four screws (two on each side) that secure the display-panel brackets to the display panel. Display...
  • Page 65 screws (4) display-panel brackets (2) 8 Turn the display panel over and place it on a clean surface. 9 Lift the tape that secures the display cable to the display-board connector and disconnect the display cable. 10 Make a note of the display cable routing and peel the cable from the back of the display panel.

  • Page 66: Replacing The Display Panel

    tape display-board connector display cable Replacing the Display Panel 1 Follow the instructions in "Before You Begin" on page 9. 2 Attach the display cable to the back of the display panel. 3 Connect the display cable to the display-board connector and secure it with the tape.
  • Page 67 CAUTION: Before turning on the computer, replace all screws and ensure that no stray screws remain inside the computer. Failure to do so may result in damage to the computer. Display...
  • Page 68 Display...

  • Page 69: Camera Module

    CAUTION: Only a certified service technician should perform repairs on your computer. Damage due to servicing that is not authorized by Dell is not covered by your warranty. 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).

  • Page 70: Replacing The Camera Module

    camera module camera cable tabs (2) Replacing the Camera Module 1 Follow the instructions in "Before You Begin" on page 9. 2 Connect the camera cable to the connector on the camera module. 3 Use the alignment posts on the display cover to place the camera module in position and snap the camera module into place.
  • Page 71 8 Replace the optical drive (see "Replacing the Optical Drive" on page 24). 9 Follow the instructions from step 3 to step 7 in "Replacing the Palm-Rest Assembly" on page 28. 10 Replace the battery (see "Replacing the Battery" on page 14). CAUTION: Before turning on the computer, replace all screws and ensure that no stray screws remain inside the computer.
  • Page 72 Camera Module...

  • Page 73: System Board

    CAUTION: Only a certified service technician should perform repairs on your computer. Damage due to servicing that is not authorized by Dell is not covered by your warranty. 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).
  • Page 74 10 Remove the thermal cooling assembly (see "Removing the Thermal Cooling Assembly" on page 49). 11 Remove the processor (see "Removing the Processor Module" on page 51). 12 Disconnect the display cable, speakers cable, audio-board cable, USB-board cable, coin-cell battery cable, and AC-adapter cable from the connectors on the system board.

  • Page 75: Replacing The System Board

    screws (2) system board Replacing the System Board 1 Follow the instructions in "Before You Begin" on page 9. 2 Slide the connectors on the system board into the slots on the computer base. 3 Replace the two screws that secure the system board to the computer base. 4 Connect the display cable, speakers cable, audio-board cable, USB-board cable, coin-cell battery cable, and AC-adapter cable to the connectors on the system board.

  • Page 76: Entering The Service Tag In The Bios

    9 Follow the instructions from step 3 to step 7 in "Replacing the Palm-Rest Assembly" on page 28. 10 Replace the optical drive (see "Replacing the Optical Drive" on page 24). 11 Replace the memory module(s) (see "Replacing the Memory Module(s)" on page 20).

  • Page 77: Flashing The Bios

    The BIOS may require flashing when an update is available or when replacing the system board. To flash the BIOS: 1 Turn on the computer. 2 Go to support.dell.com/support/downloads. 3 Locate the BIOS update file for your computer: NOTE: The Service Tag for your computer is located on a label at the bottom of your computer.
  • Page 78 8 Double-click the file icon on the desktop and follow the instructions on the screen. Flashing the BIOS...

This manual is also suitable for:

Inspiron m4040Inspiron 14-n4050

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