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Working on Your Computer

Dell™ OptiPlex™ 760 Service Manual

  Recommended Tools

  Before Working on Your Computer

  After Working on Your Computer

This document provides procedures for removing and installing the components in your computer. Unless otherwise noted, each procedure assumes that:

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

Recommended Tools

The procedures in this document may require the following tools:

Before Working on Your Computer

Use the following safety guidelines to help protect your computer from potential damage and to help 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
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. 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.
CAUTION: To avoid damaging the computer, perform the following steps before you begin working inside the computer.
  1. Ensure that the work surface is flat and clean to prevent the computer cover from being scratched.

  2. Turn off your computer (see Turning Off Your Computer).

CAUTION: To disconnect a network cable, first unplug the cable from your computer and then unplug the cable from the network device.
  1. Disconnect all telephone or network cables from the computer.

  2. Disconnect your computer and all attached devices from their electrical outlets.

  3. Press and hold the power button while the system is unplugged to ground the system board.

CAUTION: Before touching anything inside your computer, ground yourself by touching an unpainted metal surface, such as the metal at the back of the computer. While you work, periodically touch an unpainted metal surface to dissipate static electricity, which could harm internal components.

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. Shut down the operating system.

  2. 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 4 seconds to turn them off.

After Working on Your Computer

After you have completed any replacement procedures, ensure that you connect any external devices, cards, cables, and so on, before turning on your computer.

  1. Replace the computer cover (see Replacing the Computer Cover).

  2. Connect any telephone or network cables to your computer.

CAUTION: To connect a network cable, first plug the cable into the network device and then plug it into the computer.
  1. Connect your computer and all attached devices to their electrical outlets.

  2. Turn on your computer.

  3. Verify that the computer works correctly by running the Dell Diagnostics (seeDell Diagnostics).

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