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Dell™ OptiPlex™ GX240
SERVICE MANUAL
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support.dell.com
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Notes, Notices, and Cautions NOTE: A NOTE indicates important information that helps you make better use of your computer. NOTICE: A NOTICE indicates either potential damage to hardware or loss of data and tells you how to avoid the problem. CAUTION: A CAUTION indicates a potential for property damage, personal injury, or death. ____________________ Information in this document is subject to change without notice. © 2001— 2002 Dell Computer Corporation. All rights reserved. Reproduction in
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Contents 1 Before You Begin Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Recommended Tools . . . . . . . . . . . . . . . . . . . . . . . 10 Precautionary Measures . . . . . . . . . . . . . . . . . . . . . . 10 2 Computer Cover Opening the Computer Cover . . . . . . . . . . . . . . . . . . . 14 Closing the Computer Cover . . . . . . . . . . . . . . . . . . . . 17 3 Inside the Computer Key Components . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Computer Cables
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Replacing the Badge. . . . . . . . . . . . . . . . . . . . . . . . 31 Small Form-Factor Computer . . . . . . . . . . . . . . . . . 31 Small Desktop and Small Mini-Tower Computers . . . . . . . . 33 6 Chassis Intrusion Switch Removing the Chassis Intrusion Switch . . . . . . . . . . . . . . 36 Replacing the Chassis Intrusion Switch . . . . . . . . . . . . . . 38 Resetting the Chassis Intrusion Detector . . . . . . . . . . . . . 39 Removing the Control Panel . . . . . . . . . . . . . . . . .
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Small Mini-Tower Computer . . . . . . . . . . . . . . . . . . . 64 Replacing the CD/DVD Drive . . . . . . . . . . . . . . . . . . . . 67 Small Form-Factor Computer . . . . . . . . . . . . . . . . . . 67 Small Desktop Computer . . . . . . . . . . . . . . . . . . . . 69 Small Mini-Tower Computer . . . . . . . . . . . . . . . . . . . 71 Removing the Hard Drive . . . . . . . . . . . . . . . . . . . . . . 72 Small Form-Factor Computer . . . . . . . . . . . . . . . . . . 72 Small Desktop Computer . .
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9 Expansion Card Cage (Small Desktop Computer Only) Removing the Expansion-Card Cage . . . . . . . . . . . . . . . 102 Replacing the Expansion-Card Cage . . . . . . . . . . . . . . . 102 Removing the PCI Riser Board . . . . . . . . . . . . . . . . . . 103 Replacing the PCI Riser Board . . . . . . . . . . . . . . . . . . 103 10 Front-Panel Inserts Removing Front-Panel Inserts . . . . . . . . . . . . . . . . . . . 106 Replacing Front-Panel Inserts . . . . . . . . . . . . . . . . . . . 110 11 I/O P
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14 Power Supply Removing the Power Supply . . . . . . . . . . . . . . . . . . . 132 Replacing the Power Supply . . . . . . . . . . . . . . . . . . . 135 15 System Board System Board Components . . . . . . . . . . . . . . . . . . . . 138 Removing the System Board . . . . . . . . . . . . . . . . . . . 141 Replacing the System Board . . . . . . . . . . . . . . . . . . . 142 Contents 7
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8 Contents
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www.dell.com | support.dell.com SECTION 1 Before You Begin Getting Started Precautionary Measures
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Getting Started This section provides procedures for removing and replacing the components, assemblies, and subassemblies in the Dell™ OptiPlex™ GX240 small form-factor, small desktop, and small mini-tower computers. Unless otherwise noted, each procedure assumes that the following conditions exist: � You have performed the steps in "Precautionary Measures." � You have opened the computer cover. Recommended Tools The GX240 computer is primarily a tool-less one, but certain procedures (such
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3 Disconnect the computer and devices from their AC power sources. Also, disconnect any telephone or telecommunication lines from the computer. Doing so reduces the potential for personal injury or shock. If you are disconnecting a device from the computer or are removing a component from the system board, wait 15 to 30 seconds after disconnecting the computer from AC power before disconnecting the device or removing the component to avoid possible damage to the system board. Verify that t
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12 Before You Begin www.dell.com | support.dell.com
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www.dell.com | support.dell.com SECTION 2 Computer Cover Opening the Computer Cover Closing the Computer Cover
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Opening the Computer Cover NOTE: If your computer Small Form-Factor Computer is on a stand, remove the stand before you open the computer cover. 1 3 2 1 Security cable slot 2 Padlock ring 3 Release buttons (one on each side) 14 Computer Cover www.dell.com | support.dell.com
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Small Desktop Computer 1 2 1 Padlock ring 2 Release buttons (one on each side) Computer Cover 15
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Small Mini-Tower Computer 1 2 1 Padlock ring 2 Release buttons (one on each side) 1 Remove the padlock from the padlock ring, if present. NOTICE: Do not open the cover if the computer is on the edge of a desk or table. Doing so may cause the computer to tip over and fall. Make sure that the computer is situated so that there is at least 12 inches of desk- or table-top for the cover to rest on. NOTICE: Open the computer cover slowly to prevent damage to the system cables. 2 Press in on the
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Closing the Computer Cover 1 Check all cable connections, especially those that might have come loose during your work. Fold cables out of the way so that they do not catch on the computer cover. Make sure cables are not routed over the drive cage—they will prevent the cover from closing properly. 2 Check to see that no tools or extra parts (including screws) are left inside the computer. 3 On the small mini-tower computer, close the cover to a 45-degree angle and connect the drive data cab
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18 Computer Cover www.dell.com | support.dell.com
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www.dell.com | support.dell.com SECTION 3 Inside the Computer Key Components Computer Cables
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Key Components NOTE: User service Small Form-Factor Computer access points are color- 2 coded green. 3 1 4 5 6 12 11 7 10 8 9 1 Hard drive 7 System board 2 3.5-inch floppy drive 8 Power supply 3 CD/DVD drive 9 AC power connector 4 Cover release buttons (2) 10 I/O ports and connectors 5 Internal speaker 11 Padlock ring 6 Chassis intrusion switch 12 Heat sink and blower assembly 20 Inside the Computer www.dell.com | support.dell.com
