Dell Inspiron 14 5420 User Manual

Chapter 1: Identifying the correct manual for your Inspiron 14 5420.............................................. 5
Chapter 2: Working inside your computer......................................................................................6
Safety instructions.............................................................................................................................................................. 6
Before working inside your computer.......................................................................................................................6
After working inside your computer................................................................................................................................9
Chapter 3: Removing and installing components.......................................................................... 10
Recommended tools..........................................................................................................................................................10
Major components of Inspiron 14 5420........................................................................................................................ 10
Screw list..............................................................................................................................................................................12
Base cover........................................................................................................................................................................... 13
Removing the base cover...........................................................................................................................................13
Installing the base cover.............................................................................................................................................15
Battery..................................................................................................................................................................................16
Lithium-ion battery precautions............................................................................................................................... 16
Removing the battery..................................................................................................................................................17
Installing the battery....................................................................................................................................................18
Solid-state drive................................................................................................................................................................. 18
Removing the M.2 2230 solid-state drive..............................................................................................................18
Installing the M.2 2230 solid-state drive............................................................................................................... 20
Removing the M.2 2280 solid-state drive..............................................................................................................21
Installing the M.2 2280 solid-state drive............................................................................................................... 23
Memory module................................................................................................................................................................. 24
Removing the memory module.................................................................................................................................24
Installing the memory module...................................................................................................................................25
Wireless card...................................................................................................................................................................... 26
Removing the wireless card......................................................................................................................................26
Installing the wireless card........................................................................................................................................ 27
Display assembly................................................................................................................................................................28
Removing the display assembly............................................................................................................................... 28
Installing the display assembly..................................................................................................................................29
Power-adapter port...........................................................................................................................................................31
Removing the power-adapter port.......................................................................................................................... 31
Installing the power-adapter port............................................................................................................................32
I/O board.............................................................................................................................................................................33
Removing the I/O board............................................................................................................................................ 33
Installing the I/O board.............................................................................................................................................. 33
Fans...................................................................................................................................................................................... 34
Removing the left fan.................................................................................................................................................34
Installing the left fan...................................................................................................................................................35
Removing the right fan.............................................................................................................................................. 36
Installing the right fan.................................................................................................................................................37
Heat sink..............................................................................................................................................................................38
Contents
Contents 3

Dell Inspiron 14 5420 Specifications

General

Graphics	Intel Iris Xe Graphics
Operating System	Windows 11 Home
Battery	4-Cell Battery, 54WHr (Integrated)
Processor	12th Gen Intel Core i5-1235U
Display	14-inch FHD (1920 x 1080)
RAM	8GB DDR4
Storage	256GB/512GB/1TB SSD
Ports	2 x USB 3.2 Gen 1
Wireless	Bluetooth

Summary

Identifying the Correct Manual

Identifying the Correct Manual for Inspiron 14 5420

Identifies the specific service manual for the Inspiron 14 5420 with NVIDIA GeForce RTX 2050.

Working Inside Your Computer

Safety Instructions for Internal Service

Essential safety guidelines to protect against electrical shock and component damage.

Preparing for Internal Computer Service

Steps to safely shut down, disconnect power, and prepare the workspace.

Entering Service Mode

Procedure to enable Service Mode for safe component removal and installation.

Electrostatic Discharge (ESD) Protection

Guidelines and tools to prevent damage from static electricity during repairs.

Removing and Installing Components

Essential Service Preparation and Tools

Covers recommended tools, ESD protection, and initial system preparation steps.

Base Cover and Battery Service

Instructions for removing and installing the base cover and the lithium-ion battery.

Storage and Memory Module Service

Procedures for servicing M.2 SSDs and the system's memory modules.

Core Internal Component Service

Covers servicing the wireless card, display assembly, power-adapter port, and I/O board.

Cooling and Power Component Service

Instructions for replacing fans, heat sink, and power-button board.

System Board and Peripheral Service

Procedures for servicing the system board, speakers, and keyboard assembly.

Drivers and Downloads

System Setup

BIOS Overview and Purpose

Explanation of the Basic Input/Output System (BIOS) and its functions.

Entering the BIOS Setup Program

Step-by-step instructions to access the computer's BIOS settings.

BIOS Navigation Keys

Key combinations and functions for navigating the BIOS interface.

Boot Sequence Configuration

How to manage and set the order of devices for system startup.

System Setup Options and Settings

Overview of various configurable settings within the BIOS setup utility.

System and Setup Password Management

Instructions for setting, changing, deleting, or clearing BIOS passwords.

BIOS Update Procedures

Methods for updating the computer's BIOS firmware via Windows, USB, or F12 menu.

Troubleshooting

Handling Swollen Lithium-ion Batteries

Safety procedures and advice for dealing with swollen laptop batteries.

Locating Service Tag or Express Service Code

Guide to finding the unique identifier for accessing Dell support resources.

System Diagnostic Lights and Codes

Explanation of power/battery status lights and diagnostic error codes.

On-board Diagnostics with SupportAssist

Information about using the built-in diagnostic tool for hardware checks.

Operating System Recovery

How to use Dell SupportAssist OS Recovery to repair or restore the system.

WiFi Connectivity Troubleshooting

Steps for performing a WiFi power cycle to resolve connectivity issues.

Getting Help and Contacting Dell

Accessing Self-Help Resources

Information on utilizing online resources like Dell.com and My Dell app.

Contacting Dell Support

Methods for reaching Dell technical support and customer service.