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Dell Precision 7740 User Manual

Dell Precision 7740
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Dell Precision 7740
Service Manual
Regulatory Model: P34E
Regulatory Type: P34E002
September 2021
Rev. A02

Table of Contents

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Dell Precision 7740 Specifications

General IconGeneral
BrandDell
ModelPrecision 7740
CategoryLaptop
LanguageEnglish

Summary

Working on Your Computer

Safety Instructions

Guidelines to protect your computer from potential damage and ensure personal safety.

Shutting Down Your Computer (Windows 10)

Procedure for safely shutting down the computer, specifically for Windows 10.

Prepare for Internal Service

Steps to prepare the computer and workspace before performing internal maintenance.

Complete Internal Service

Steps to take after internal maintenance to ensure proper reassembly and functionality.

Technology and Components

HDMI 2.0 Technology

Details on the HDMI 2.0 standard, its features, and advantages for digital audio/video.

Understanding USB Features

Overview of Universal Serial Bus (USB) evolution and its features, including USB 3.0/3.1 Gen 1.

USB Type-C Connector

Explanation of the USB Type-C connector, its capabilities like Power Delivery and alternate modes.

Removing and Installing Components

Essential Service Tools

Lists the necessary tools for performing component removal and installation procedures.

Screw Identification Guide

A table detailing screw types, quantities, and images for component installation.

SD Card Removal and Installation

Instructions for removing and installing the SD card from the system.

Battery Cover Service

Procedures for removing and installing the computer's battery cover.

Lithium-Ion Battery Handling and Service

Guidelines for handling Lithium-ion batteries and procedures for removal/installation.

Keyboard Replacement Procedure

Step-by-step instructions for removing and installing the laptop keyboard.

Base Cover Removal and Installation

Procedures for removing and installing the bottom base cover of the laptop.

Primary Memory Module Service

Instructions for removing and installing the primary RAM module.

Secondary Memory Module Service

Instructions for removing and installing the secondary RAM module.

WWAN Card Service

Steps for removing and installing the Wireless Wide Area Network (WWAN) card.

WLAN Card Service

Steps for removing and installing the Wireless Local Area Network (WLAN) card.

SIM Card Service

Instructions for removing and installing the Subscriber Identity Module (SIM) card.

M.2 SSD Service

Procedures for removing and installing M.2 Solid State Drive (SSD) modules.

2.5-Inch Hard Drive Service

Instructions for removing and installing the 2.5-inch hard drive assembly.

Hard Drive Interposer Board Service

Steps for removing and installing the hard drive interposer board.

Coin-Cell Battery Service

Procedures for removing and installing the coin-cell battery.

Power Connector Port Service

Instructions for removing and installing the laptop's power connector port.

Palm Rest Removal and Installation

Steps for removing and installing the laptop's palm rest assembly.

Touchpad Button Service

Instructions for removing and installing the touchpad button assembly.

Smart Card Cage Service

Procedures for removing and installing the smart card cage.

Speaker Removal and Installation

Steps for removing and installing the laptop speakers.

LED Board Service

Instructions for removing and installing the LED indicator board.

Heat Sink Assembly Service

Procedures for removing and installing the system's heat sink assembly.

Graphics Card (GPU) Service

Steps for removing and installing the graphics card (GPU).

System Board Service

Instructions for removing and installing the main system board.

Display Assembly Service

Procedures for removing and installing the entire display assembly.

Display Bezel Service

Steps for removing and installing the display bezel around the screen.

Display Panel Service

Instructions for removing and installing the display panel itself.

Display Hinge Service

Procedures for removing and installing the display hinges.

Camera Module Service

Steps for removing and installing the system's camera module.

eDP Cable Service

Instructions for removing and installing the eDP (Embedded DisplayPort) cable.

Display Support Bracket Service

Procedures for removing and installing display support brackets.

BIOS Setup

BIOS Functionality Overview

Explanation of the BIOS role in managing system data flow and devices.

Accessing BIOS Setup

Steps to access and enter the BIOS setup utility on the computer.

BIOS Navigation Controls

Explanation of the keyboard keys used for navigating within the BIOS setup.

One-Time Boot Menu Usage

Instructions on how to access the one-time boot menu to select boot devices.

BIOS Configuration Options

Details on various configuration options available within the system setup.

BIOS Update Procedures

Procedures for updating the system's BIOS via Windows, USB, or the F12 menu.

System and Setup Password Security

Information on setting, changing, or deleting system and setup passwords for security.

Clearing CMOS Settings

Step-by-step guide to clearing CMOS settings, which resets BIOS configurations.

Clearing BIOS Passwords

Guidance on clearing BIOS or system passwords by contacting Dell support.

Troubleshooting

Swollen Battery Safety and Handling

Safety guidelines and procedures for handling swollen Lithium-ion batteries.

ePSA Diagnostics Guide

Instructions for running the ePSA diagnostics to check system hardware.

System Self-Test Utilities (BIST)

Information and procedures for running built-in self-tests like M-BIST and LCD BIST.

Diagnostic LED Error Codes

Explains the diagnostic LED blinking patterns and their corresponding problems.

Operating System Recovery Options

Information on how the system automatically starts Dell SupportAssist OS Recovery.

RTC Reset Procedure

Procedure to reset the Real-Time Clock (RTC) to recover from boot issues.

Battery Status LED Indicators

Details the battery status LED behavior under different power states and charge levels.

Backup and Recovery Media

Recommends creating recovery drives and mentions Dell's recovery options.

WiFi Connectivity Troubleshooting

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

Perform Hard Reset (Drain Flea Power)

Steps to drain residual power from the computer, also known as a hard reset.

Getting Help

Contacting Dell Support

Information on how to contact Dell support for sales, technical assistance, or service.

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