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Dell OptiPlex 990 Desktop Service Manual
Regulatory Model: D05D
Regulatory Type: D05D001
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Notes, Cautions, and Warnings NOTE: A NOTE indicates important information that helps you make better use of your computer. CAUTION: A CAUTION indicates potential damage to hardware or loss of data if instructions are not followed. WARNING: A WARNING indicates a potential for property damage, personal injury, or death. Information in this publication is subject to change without notice. © 2011 Dell Inc. All rights reserved. Reproduction of these materials in any manner whatsoever without the
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Contents Notes, Cautions, and Warnings..................................................................2 1 Working on Your Computer......................................................................9 Before Working Inside Your Computer.............................................................................9 Recommended Tools.......................................................................................................10 Turning Off Your Computer..................................
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Installing The Memory.....................................................................................................28 8 Chassis Intrusion Switch........................................................................29 Removing the Chassis Intrusion Switch..........................................................................29 Installing The Chassis Intrusion Switch..........................................................................30 9 Speaker...................................
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16 Power Supply..........................................................................................49 Removing The Power Supply..........................................................................................49 Installing The Power Supply...........................................................................................51 17 System Board..........................................................................................53 Removing The System Board....................
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Controller has failed..................................................................................................84 Data error .................................................................................................................84 Decreasing available memory .................................................................................85 Diskette drive 0 seek failure.....................................................................................85 Diskette read failure.
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Shutdown failure ......................................................................................................89 Time-of-day clock stopped ......................................................................................89 Time-of-day not set-please run the System Setup program ...................................90 Timer chip counter 2 failed ......................................................................................90 Unexpected interrupt in protected mode..............
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1 Working on Your Computer Before Working Inside Your Computer Use the following safety guidelines to help protect your computer from potential damage and to help 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 orde
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NOTE: The color of your computer and certain components may appear differently than shown in this document. To avoid damaging your computer, perform the following steps before you begin working inside the computer. 1. Ensure that your 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 ne
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Click Start , then click the arrow in the lower-right corner of the Start menu as shown below, and then click Shut Down. – In Windows XP: Click Start → Turn Off Computer → Turn Off . The computer turns off after the operating system shutdown process is complete. 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 6 seconds t
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2 Cover Removing the Cover 1. Follow the procedures in Before Working Inside Your Computer. 2. Pull up the cover-release latch at the side of the computer. 3. Lift the cover upward to a 45–degree angle and remove it from the computer. Installing The Cover 1. Place the computer cover on the chassis. 2. Press down on the computer cover until it clicks into place. 13
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3. Follow the procedures in After Working Inside Your Computer. 14
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3 Front Bezel Removing the Front Bezel 1. Follow the procedures in Before Working Inside Your Computer. 2. Remove the cover. 3. Pry the front bezel retention clips away from the chassis. 4. Rotate the bezel away from the computer to release the hooks on the opposite edge of the bezel from the chassis. 15
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Installing The Front Bezel 1. Insert the hooks along the bottom edge of the front bezel into the slots on the chassis front. 2. Rotate the bezel towards the computer to engage the four front-bezel retention clips until they click into place. 3. Install the cover. 4. Follow the procedures in After Working Inside Your Computer. 16
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4 Cards Removing the Expansion Card 1. Follow the procedures in Before Working Inside Your Computer. 2. Remove the cover. 3. Rotate the release tab on the card-retention latch upward. 4. Pull the release lever away from the PCIe x16 card to release the securing tab from the dent in the card. Then, ease the card up and out of its connector and remove it from the computer. 5. Lift the PCIe x1 expansion card (if any) up and out of its connector and remove it from the computer. 17
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6. Lift the PCI expansion card (if any) up and out of its connector and remove it from the computer. 7. Lift the PCI x4 expansion card (if any) up and out of its connector and remove it from the computer. 18
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Installing The Expansion Card 1. Insert the PCIe x4 card into the connector on the system board and press down to secure it in place. 2. Insert the PCIe card (if any) into the connector on the system board and press down to secure it in place. 3. Insert the PCIe x1 card (if any) into the connector on the system board and press down to secure it in place. 4. Insert the PCIe x16 card (if any) into the connector on the system board and press down to secure it in place. 5. Install the cover. 6.
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