Working On Your Computer; Safety Instructions; Turning Off Your Computer - Windows 10; Before Working Inside Your Computer - Dell Precision 7740 Service Manual

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Setup and specifications manual (36 pages)

Service manual (122 pages)

Table of Contents

Safety instructions

Use the following safety guidelines to protect your computer from potential damage and to ensure your personal safety. Unless otherwise

noted, each procedure included in this document assumes that the following conditions exist:

•

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 reverse order.

NOTE:

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 power source.

WARNING:

Before working inside your computer, read the safety information that shipped with your computer. For

additional safety best practices information, see the

CAUTION:

Many repairs may only be done by a certified service technician. You should only perform troubleshooting and

simple repairs as authorized in your product documentation, or as directed by the online or telephone service and

support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow

the safety instructions that came with the product.

CAUTION:

To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching

an unpainted metal surface at the same time as touching a connector on the back of the 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.

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; if you are disconnecting this type of cable, press in on the locking tabs before you

disconnect the cable. As you pull connectors apart, keep them evenly aligned to avoid bending any connector pins. Also,

before you connect a cable, ensure that both connectors are correctly oriented and aligned.

NOTE:

The color of your computer and certain components may appear differently than shown in this document.

Turning off your computer — Windows 10

CAUTION:

To avoid losing data, save and close all open files and exit all open programs before you turn off your

computer or remove the side cover.

1. Click or tap

2. Click or tap

and then click or tap Shut down.

NOTE:

Ensure that the computer and all attached devices are turned off. If your computer and attached devices did

not automatically turn off when you shut down your operating system, press and hold the power button for about 6

seconds to turn them off.

Before working inside your computer

1. Ensure that your work surface is flat and clean to prevent the computer cover from being scratched.

2. Turn off your computer.

3. Disconnect all network cables from the computer (if available).