Dell OptiPlex GX240 User Manual Page 1

www.dell.comsupport.dell.comDell™ OptiPlex™ GX240SERVICE MANUAL

10 Before You Beginwww.dell.com | support.dell.comGetting StartedThis section provides procedures for removing and replacing the components, assemblie

100 Expansion Cardwww.dell.com | support.dell.com

www.dell.com | support.dell.comSECTION 9Expansion-Card Cage (Small Desktop Computer Only) Removing the Expansion-Card CageReplacing the Expansion-Card

102 Expansion-Card Cage (Small Desktop Computer Only)www.dell.com | support.dell.comRemoving the Expansion-Card Cage CAUTION: Use a wrist grounding s

Expansion-Card Cage (Small Desktop Computer Only) 103Expansion-Card Cage Replacement3Replace and reconnect any cables you removed in steps 1 and 2 of

104 Expansion-Card Cage (Small Desktop Computer Only)www.dell.com | support.dell.com

www.dell.com | support.dell.comSECTION 10Front-Panel Inserts Removing Front-Panel InsertsReplacing Front-Panel Inserts

106 Front-Panel Insertswww.dell.com | support.dell.comRemoving Front-Panel Inserts1 On the small form-factor and small desktop computers, perform the

Front-Panel Inserts 107Small Form-Factor Computer

108 Front-Panel Insertswww.dell.com | support.dell.comSmall Desktop Computer

Front-Panel Inserts 109Small Mini-Tower Computer

Before You Begin 113 Disconnect the computer and devices from their AC power sources. Also, disconnect any telephone or telecommunication lines from t

110 Front-Panel Insertswww.dell.com | support.dell.comReplacing Front-Panel InsertsTo replace a front-panel insert, follow the appropriate procedure,

www.dell.com | support.dell.comSECTION 11I/O Panel Removing the Front I/O PanelReplacing the Front I/O Panel

112 I/O Panelwww.dell.com | support.dell.comRemoving the Front I/O PanelSmall Form-Factor Computer1 To access the mounting screw that holds the front

I/O Panel 1133 Disconnect the front I/O cable from the front-panel connector on the system board (see "System Board Components" for the loca

114 I/O Panelwww.dell.com | support.dell.comFront I/O Panel Removal5Remove all cables that are connected to the front I/O panel.6 Remove the mounting

I/O Panel 115Small Mini-Tower ComputerFront I/O Panel Removal1Disconnect the control panel cable from the control panel connector on the I/O panel.2 D

116 I/O Panelwww.dell.com | support.dell.comNote the routing of the control panel cable as you remove it from the computer so that you can replace it

www.dell.com | support.dell.comSECTION 12Memory Removing a Memory ModuleReplacing a Memory Module

118 Memorywww.dell.com | support.dell.comRemoving a Memory Module CAUTION: Use a wrist grounding strap as explained in "Precautionary Measures.&

Memory 119Memory Module Replacement1231 Socket2 Slot3 Securing clip

12 Before You Beginwww.dell.com | support.dell.com

120 Memorywww.dell.com | support.dell.com

www.dell.com | support.dell.comSECTION 13Microprocessor Removing the Cooling Fan/Heat-Sink Assembly and MicroprocessorReplacing the Cooling Fan/Heat-S

122 Microprocessorwww.dell.com | support.dell.comRemoving the Cooling Fan/Heat-Sink Assembly and Microprocessor CAUTION: Use a wrist grounding strap

Microprocessor 123Heat Sink Removal—Small Mini-Tower Computer5On the small form-factor and small desktop computers, remove the securing clips to remov

124 Microprocessorwww.dell.com | support.dell.comHeat Sink/Blower Assembly Removal—Small Form-Factor and Small Desktop Computers NOTICE: Before you r

Microprocessor 125 NOTICE: Do not discard the original heat sink and securing clips unless you are installing a microprocessor upgrade kit from Dell.

126 Microprocessorwww.dell.com | support.dell.com10 Remove the microprocessor from the socket.11 Leave the release lever extended so that the socket i

Microprocessor 127Microprocessor Installation NOTICE: You must position the microprocessor correctly in the ZIF socket to avoid permanent damage to t

128 Microprocessorwww.dell.com | support.dell.com NOTICE: If you are not installing a microprocessor upgrade kit from Dell, reuse the original blower

Microprocessor 129 NOTE: If a setup password has been assigned by someone else, contact the network administrator for information on resetting the ch

www.dell.com | support.dell.comSECTION 2Computer Cover Opening the Computer CoverClosing the Computer Cover

130 Microprocessorwww.dell.com | support.dell.com

www.dell.com | support.dell.comSECTION 14Power Supply Removing the Power SupplyReplacing the Power Supply

132 Power Supplywww.dell.com | support.dell.comRemoving the Power SupplySmall Form-Factor Computer1 Release button2 AC power connector21

Power Supply 133Small Desktop Computer1 Release button2 AC power connector12

134 Power Supplywww.dell.com | support.dell.comSmall Mini-Tower Computer1Disconnect the AC power cable from the back of the power supply.2 Disconnect

Power Supply 1357 Lift the power supply up and out of the computer.Replacing the Power Supply1 Slide the power supply into place.2 Reconnect the DC po

136 Power Supplywww.dell.com | support.dell.com

www.dell.com | support.dell.comSECTION 16System Board System Board ComponentsRemoving the System BoardReplacing the System Board

138 System Boardwww.dell.com | support.dell.comSystem Board Components7191023 4 5681112131517181920211416222324252627282930

System Board 139System Board Labels1 Floppy drive 16 Audio line-out connector2 Internal speaker 17 12-volt microprocessor power connector3 EIDE2 conne

14 Computer Coverwww.dell.com | support.dell.comOpening the Computer Cover NOTE: If your computer is on a stand, remove the stand before you open the

140 System Boardwww.dell.com | support.dell.comSystem Board JumperKYBD_MOUSE Keyboard and mouse connectorsMODEM Telephony connectorNIC_USB Integrated

System Board 141System-Board Jumper SettingsRemoving the System Board CAUTION: Before you remove any component from the system board, read the steps

142 System Boardwww.dell.com | support.dell.comRemoving the System Board5Place the system board that you just removed next to the replacement system b

System Board 1435 Set the jumpers on the replacement system board so it is identical to the one on the existing board. NOTE: Some components and conn

144 System Boardwww.dell.com | support.dell.com

Computer Cover 15Small Desktop Computer1 Padlock ring2 Release buttons (one on each side)21

16 Computer Coverwww.dell.com | support.dell.comSmall Mini-Tower Computer1Remove the padlock from the padlock ring, if present. NOTICE: Do not open t

Computer Cover 17Closing the Computer Cover1 Check all cable connections, especially those that might have come loose during your work. Fold cables ou

18 Computer Coverwww.dell.com | support.dell.com

www.dell.com | support.dell.comSECTION 3Inside the Computer Key ComponentsComputer Cables

Notes, Notices, and Cautions NOTE: A NOTE indicates important information that helps you make better use of your computer. NOTICE: A NOTICE indicate

20 Inside the Computerwww.dell.com | support.dell.comKey Components NOTE: User service access points are color-coded green.Small Form-Factor Computer

Inside the Computer 21Small Desktop Computer1 Cover release buttons (2) 8 AC power connector2 Hard drive 9 Padlock ring3 Internal speaker 10 I/O ports

22 Inside the Computerwww.dell.com | support.dell.comSmall Mini-Tower Computer1 Cover release buttons (2) 8 AC power connector2 Hard drive 9 Padlock r

Inside the Computer 23Computer CablesSmall Form-Factor Computer1 CD/DVD drive data cable 6 IDE data cable (hard drive)2 Floppy drive data cable 7 Inpu

24 Inside the Computerwww.dell.com | support.dell.comSmall Desktop Computer1 CD/DVD drive audio cable 5 Input/output cable2 CD/DVD drive data cable 6

Inside the Computer 25Small Mini-Tower Computer1 CD/DVD drive power cable 6 IDE drive power cable (hard drive)2 CD/DVD drive audio cable 7 IDE drive d

26 Inside the Computerwww.dell.com | support.dell.comCable ColorsDevice ColorHard drive BlueFloppy drive BlackCD/DVD drive OrangeUSB GrayATA, IDE, or

www.dell.com | support.dell.comSECTION 4BatteryRemoving the BatteryReplacing the Battery

28 Batterywww.dell.com | support.dell.comRemoving the Battery CAUTION: There is a danger of the new battery exploding if it is incorrectly installed.

www.dell.com | support.dell.comSECTION 5Badge Removing the BadgeReplacing the Badge

Contents 3Contents1 Before You BeginGetting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Recommended Tools. . . . . . . . . . . .

30 Badgewww.dell.com | support.dell.comRemoving the BadgeSmall Form-Factor Computer1 Open the computer cover.2 Using a flat-blade screwdriver, release

Badge 31Small Desktop and Small Mini-Tower Computers1 Open the front USB door.2 From inside the door, push in the two tabs on either side of the badge

32 Badgewww.dell.com | support.dell.comComputer Cover ReplacementTo help replace the plastic computer cover, remove the accent door and front mask fro

Badge 33Front Mask and Accent Door Removal2Replace the badge by pressing it into place, ensuring that the two tabs click, securing it into position.Sm

34 Badgewww.dell.com | support.dell.com

www.dell.com | support.dell.comSECTION 6Chassis Intrusion Switch Removing the Chassis Intrusion SwitchReplacing the Chassis Intrusion SwitchResetting

36 Chassis Intrusion Switchwww.dell.com | support.dell.comRemoving the Chassis Intrusion SwitchSmall Form-Factor Computer

Chassis Intrusion Switch 37Small Desktop Computer

38 Chassis Intrusion Switchwww.dell.com | support.dell.comSmall Mini-Tower Computer1Disconnect the chassis intrusion switch cable connector from the c

Chassis Intrusion Switch 39Resetting the Chassis Intrusion Detector1 Enter system setup by pressing <F2> during the computer's POST. NOTE:

4 ContentsReplacing the Badge . . . . . . . . . . . . . . . . . . . . . . . . 31Small Form-Factor Computer . . . . . . . . . . . . . . . . . 31Sma

40 Chassis Intrusion Switchwww.dell.com | support.dell.com

www.dell.com | support.dell.comSECTION 7Control Panel

42 Control Panelwww.dell.com | support.dell.comRemoving the Control PanelSmall Form-Factor Computer1 Open the computer cover.2 Using a flat-blade scre

Control Panel 43Control Panel Removal3Remove the metal control-panel shield.4 Remove the screw that holds the control panel to the computer.Small Desk

44 Control Panelwww.dell.com | support.dell.comControl Panel Removal2Remove the screw holding the control panel to the computer, and pull the panel up

Control Panel 45Front Bezel Tabs—Small Mini-Tower Computerb Close the cover and remove the front bezel. 1 Top panel2 Bottom panel3 Front-panel tabs (3

46 Control Panelwww.dell.com | support.dell.comControl Panel Removal4Remove the screw holding the control panel to the chassis, and pull the panel up

Control Panel 47Computer Cover ReplacementTo help replace the plastic computer cover, remove the accent door and front mask from the plastic computer

48 Control Panelwww.dell.com | support.dell.comFront Mask and Accent Door Removal—Small Form-Factor ComputerSmall Desktop Computer1 Replace the contro

www.dell.com | support.dell.comSECTION 7Drives Removing the Floppy DriveReplacing the Floppy DriveRemoving the CD/DVD DriveReplacing the CD/DVD DriveR

Contents 5Small Mini-Tower Computer . . . . . . . . . . . . . . . . . . . 64Replacing the CD/DVD Drive. . . . . . . . . . . . . . . . . . . . 67Smal

50 Driveswww.dell.com | support.dell.comRemoving the Floppy DriveSmall Form-Factor Computer 1 Disconnect the floppy-drive cable from the system board.

Drives 51b To release the floppy-drive cable from the connector, slide the lever until it is fully extended, and then lift the cable away.

52 Driveswww.dell.com | support.dell.comRemoving the Floppy-Drive Cableor1212

Drives 536 Remove the floppy drive from its sled by pulling the sled tab out while pushing the drive up, and then sliding the drive out of the sled.Sm

54 Driveswww.dell.com | support.dell.com3 Press inward on the two tabs on the sides of the drive bay to disengage the drive from the computer.4 Slide

Drives 55Small Mini-Tower Computer1 Disconnect the power cable and the floppy-drive data cable from the drive.2 Disconnect the data cable from the flo

56 Driveswww.dell.com | support.dell.com2 Connect the interposer board to the floppy drive.a Slide the floppy-drive cable into the connector.b Close t

Drives 57Attaching the Floppy-Drive Data Cable1342or1342

58 Driveswww.dell.com | support.dell.com4 Attach the power cable to the interposer board on the floppy drive.5 Attach the CD/DVD drive cable and the p

Drives 59Cable ReplacementSmall Mini-Tower Computer1 If the replacement drive does not have the bracket rails attached, remove the rails from the old

6 Contents9 Expansion Card Cage (Small Desktop Computer Only)Removing the Expansion-Card Cage . . . . . . . . . . . . . . . 102Replacing the Expansi

60 Driveswww.dell.com | support.dell.comCable ReplacementRemoving the CD/DVD DriveSmall Form-Factor Computer1 Remove the interposer board from the CD/

Drives 61Interposer Board Removal2Press inward on the two tabs on the sides of the drive to disengage the drive from the computer.3 Slide the drive up

62 Driveswww.dell.com | support.dell.comCD/DVD Drive RemovalSmall Desktop Computer1 Remove the data, power, and audio cables from the drive.

Drives 63Cable Removal2Press inward on the two tabs on the sides of the drive bay to disengage the drive from the computer.3 Slide the drive upward an

64 Driveswww.dell.com | support.dell.comDrive Bracket Rail RemovalSmall Mini-Tower Computer1 Remove the data, power, and audio cables from the drive.

Drives 65Cable Removal2Press inward on the two tabs on the sides of the drive bay to disengage the drive from the computer.3 Slide the drive upward an

66 Driveswww.dell.com | support.dell.comCD/DVD Drive Removal4If the replacement drive does not have the bracket rails attached, remove the rails from

Drives 67Replacing the CD/DVD DriveSmall Form-Factor Computer1 Gently slide the drive into place until the tabs securely click into position.2 Connect

68 Driveswww.dell.com | support.dell.comInterposer Board Replacement132or132

Drives 69If your computer came with a CD drive, use the spare connector on the existing interface cable. Otherwise, use the IDE interface cable provid

Contents 714 Power SupplyRemoving the Power Supply . . . . . . . . . . . . . . . . . . . 132Replacing the Power Supply . . . . . . . . . . . . . .

70 Driveswww.dell.com | support.dell.comCable ReplacementIf your computer came with an IDE CD drive, use the spare connector on the existing interface

Drives 715 If the drive bay was previously empty, remove the front-panel insert from the front panel.a Release the insert tabs from inside the chassis

72 Driveswww.dell.com | support.dell.comIf your computer came with an IDE CD drive, use the spare connector on the existing interface cable. Otherwise

Drives 73Cable Removal2Press in on the tabs on each side of the drive, and slide the drive toward the I/O panel until the notch in the drive rail allo

74 Driveswww.dell.com | support.dell.comHard Drive Removal3If the replacement drive does not have the bracket rails attached, remove the rails from th

Drives 75 NOTE: Your computer’s hard drive may or may not have a plastic shroud cover. Operating the computer without a hard-drive shroud does not af

76 Driveswww.dell.com | support.dell.comCable Removal3Press in on the tabs on each side of the drive and slide it up and out.1 Hard-drive cable2 Power

Drives 77Hard Drive Removal4If the replacement drive does not have the bracket rails attached, remove the rails from the old drive by removing the two

78 Driveswww.dell.com | support.dell.comCable Removal2Press in on the tabs on each side of the drive and slide it up and out.1 Power cable2 Hard-drive

Drives 79Hard Drive Removal3If the replacement drive does not have the bracket rails attached, remove the rails from the old drive by removing the two

8 Contents

80 Driveswww.dell.com | support.dell.comSmall Form-Factor ComputerHard Drive Replacement1 Power cable2 IDE data cable3 IDE1 connector312

Drives 81Small Desktop ComputerHard Drive Replacement1 Power cable2 IDE data cable3 IDE1 connector312

82 Driveswww.dell.com | support.dell.comSmall Mini-Tower ComputerHard Drive Replacement3On the small desktop computer, if your computer has a hard-dri

Drives 83To locate the system board interface connector (IDE1), see "System Board Components." 5 If the drive you just installed is the prim

84 Driveswww.dell.com | support.dell.com4 Remove the two green plastic drive rails inside the lower hard-drive bay.These rails are not attached with s

Drives 85Second Hard Drive Installed NOTICE: Match the colored strip on the cable with pin 1 on the drive. Locate the extra connector on the drive ca

86 Driveswww.dell.com | support.dell.com

www.dell.com | support.dell.comSECTION 8Expansion Card Expansion Card TypesRemoving an Expansion CardReplacing an Expansion CardRemoving an AGP Graphi

88 Expansion Cardwww.dell.com | support.dell.comExpansion Card TypesYour computer provides expansion slots for the following cards:• In the small form

Expansion Card 89 NOTE: Before disconnecting a device from the computer or removing a component from the system board, verify that the auxiliary powe

www.dell.com | support.dell.comSECTION 1Before You Begin Getting StartedPrecautionary Measures

90 Expansion Cardwww.dell.com | support.dell.com2 Press the hinged lever on the expansion card retention arm and raise the retention arm.3 Grasp the c

Expansion Card 913 Press the lever on the expansion card retention arm and raise the retention arm.Expansion Card Removal4Grasp the card by its outsid

92 Expansion Cardwww.dell.com | support.dell.comSmall Mini-Tower Computer3Grasp the card by its outside corners and ease it out of its connector on th

Expansion Card 93 CAUTION: Some network cards automatically start the computer when they are connected. To guard against electrical shock, be sure to

94 Expansion Cardwww.dell.com | support.dell.comExpansion Card Connection4Before lowering the retention arm, make sure of the following:• Tops of all

Expansion Card 95Retention Arm Closure5Reconnect the computer and devices to their electrical outlets and turn them on. NOTE: After you open and clos

96 Expansion Cardwww.dell.com | support.dell.comRemoving an AGP Graphics CardSmall Form-Factor Computer1 Remove the filler bracket by raising the hing

Expansion Card 97AGP Slot Filler Bracket Removal3On the AGP card clip, press the lever toward the PCI slot 1.4 Pull the AGP card up and out of the AGP

98 Expansion Cardwww.dell.com | support.dell.comAGP Slot Filler Bracket Removal2On the AGP card clip, press the lever toward PCI slot 1.3 Pull the AGP

Expansion Card 99Replacing an AGP Graphics CardSmall Form-Factor, Small Desktop, and Small Mini-Tower Computers1Press the AGP card clip lever, ensurin