Dell OptiPlex GX400 Service Manual
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Dell OptiPlex GX400 Service Manual

Dell OptiPlex GX400 Service Manual

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Dell™ OptiPlex™ GX400 Service Manual 
Before You Begin
Computer Cover
Inside Your Computer
System Board Components
Front Panel
Front-Panel Inserts
Front-Panel Buttons
Power Supply
System Memory
Disk Drives and Media
AGP Card Brace
Expansion Cards
Expansion-Card Guide
Control Panel
Chassis Intrusion Switch
Microprocessor Airflow Shroud
Microprocessor
Microprocessor Cooling Fan
VRM
Computer Battery
System Board
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 potentially hazardous situation which, if not avoided, may result in minor or moderate injury.
Information in this document is subject to change without notice.
© 2001 Dell Computer Corporation. All rights reserved.
Reproduction in any manner whatsoever without the written permission of Dell Computer Corporation is strictly forbidden.
Trademarks used in this text: Dell, OptiPlex and the DELL logo are trademarks of Dell Computer Corporation.
Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products. Dell Computer Corporation disclaims any proprietary interest in trademarks and trade names other than its
own.
A00 28 Feb 2001

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  • Page 1 Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products. Dell Computer Corporation disclaims any proprietary interest in trademarks and trade names other than its...

  • Page 2: Removing The Agp Card Brace

    Back to Contents Page AGP Card Brace Dell™ OptiPlex™ GX400 Service Manual    Removing the AGP Card Brace   Replacing the AGP Card Brace Removing the AGP Card Brace To access some components on the board, you may need to remove the AGP card brace. NOTE:...

  • Page 3: Replacing The Computer Battery

    Back to Contents Page Computer Battery Dell™ OptiPlex™ GX400 Service Manual    Removing the Computer Battery   Replacing the Computer Battery Removing the Computer Battery CAUTION: There is a danger of the new battery exploding if it is installed incorrectly. Replace the battery only with the same or equivalent type recommended by the manufacturer.

  • Page 4: Before You Begin

    Back to Contents Page Before You Begin Dell™ OptiPlex™ GX400 Service Manual    Precautionary Measures   Recommended Tools   Restarting the Computer Precautionary Measures Before you remove the computer cover, perform the following steps in the sequence indicated. 1.  Turn off your computer and any devices. 2.  Disconnect your computer and devices from their power sources. Also, disconnect any telephone or telecommunication lines from the computer.

  • Page 5: Removing The Chassis Intrusion Switch

    Back to Contents Page Chassis Intrusion Switch Dell™ OptiPlex™ GX400 Service Manual    Removing the Chassis Intrusion Switch   Replacing the Chassis Intrusion Switch Removing the Chassis Intrusion Switch CAUTION: Before you perform this procedure, see "Precautionary Measures." NOTICE: Before disconnecting a device from the computer or removing a component from the system board, verify that the standby power light on the system board has turned off.
  • Page 6 Back to Contents Page      ...

  • Page 7: Removing The Control Panel

    Back to Contents Page Control Panel Dell™ OptiPlex™ GX400 Service Manual    Components   Removing the Control Panel   Replacing the Control Panel Components The following figure shows the control panel and the location of its principal connectors and components. Control Panel Components   Removing the Control Panel...

  • Page 8: Replacing The Control Panel

    Replacing the Control Panel To replace the control panel, perform the removal procedure in reverse. Back to Contents Page      ...

  • Page 9: Removing The Computer Cover

    Back to Contents Page Computer Cover Dell™ OptiPlex™ GX400 Service Manual    Removing the Computer Cover   Replacing the Computer Cover Removing the Computer Cover CAUTION: Before you perform this procedure, see "Precautionary Measures." 1.  Turn off the computer and peripherals, and disconnect them from their electrical outlets.
  • Page 10 b.  Rotate the cover downward toward the bottom of the chassis. With both hands, press against the bottom edge of the cover to ensure that the securing hooks at the bottom of the cover click into place. Replacing the Cover  ...

  • Page 11: Disk Drives And Media

    Back to Contents Page Disk Drives and Media Dell™ OptiPlex™ GX400 Service Manual    Drive Location   Removing the Floppy Drive   Replacing the Floppy Drive   Removing a CD, Zip, or Other External Drive   Replacing a CD, Zip, or Other External Drive   Removing a Hard Drive   Replacing a Hard Drive  ...

  • Page 12: Replacing The Floppy Drive

    5.  Ensure that all cables are firmly connected. Fold cables out of the way to provide airflow for the fan and cooling vents. 6.  Rotate the power supply back into position until the securing tab snaps into the release latch. 7.  Replace the computer cover and restart the computer. 8.  Run the Dell Diagnostics to verify that the drive is operating properly.
  • Page 13 Removing a CD, Zip, or Other External Drive CAUTION: Before you perform this procedure, see "Precautionary Measures." NOTICE: Before disconnecting a device from the computer or removing a component from the system board, verify that the standby power light on the system board has turned off.
  • Page 14 Replacing a CD, Zip, or Other External Drive 1.  Attach the new drive to the drive bracket. Turn the drive upside down, and fit the bracket on the drive so that the screw holes align. To ensure proper installation, all screw holes should be aligned and the tabs on the front of the bracket should be flush with the front of the drive (see "Removing the Drive from the Bracket").
  • Page 15 See the operating system's documentation for instructions. NOTE: Tape drives sold by Dell come with their own operating software and documentation. After you install a tape drive, refer to the documentation that came with the drive for instructions on installing and using the tape drive software.

  • Page 16: Removing A Hard Drive

    Removing a Hard Drive CAUTION: Before you perform this procedure, see "Precautionary Measures." NOTICE: Before disconnecting a device from the computer or removing a component from the system board, verify that the standby power light on the system board has turned off. To locate this light, see "System Board Components."...

  • Page 17: Replacing A Hard Drive

    Replacing a Hard Drive 1.  Slide the drive into one of bracket bays, oriented so that the connectors on the back of the drive will face the interior of the chassis when the bracket is reinstalled. See "Removing a Hard Drive from the Bracket."...
  • Page 18 12.  Partition and logically format the drive before proceeding to the next step. See the operating system's documentation for instructions. 13.  Run the Dell Diagnostics to test the drive. 14.  If the hard drive you installed is the primary drive, install the operating system on the drive.
  • Page 19  ...

  • Page 20: Expansion Card Types

    Back to Contents Page Expansion Cards Dell™ OptiPlex™ GX400 Service Manual    Expansion Card Types   Removing an Expansion Card Expansion Card Types Up to five 32-bit, 33-MHz PCI expansion cards. One 32-bit AGP card. The expansion slot supports AGP 4x or 2x Pro50 modes operating at 1.5 V.
  • Page 21 8.  If you are removing the card permanently, install a filler bracket in the empty card-slot opening, using the screw you removed in step If you need a filler bracket, contact Dell. See the User's Guide for information on contacting Dell. NOTE: Installing filler brackets over empty card-slot openings is necessary to maintain Federal Communications Commission (FCC) certification of the computer.
  • Page 22 b.  Connect external audio devices to the audio connectors on the back panel. 13.  If you removed an add-in network adapter, perform the following steps: a.  Enter system setup, select Integrated Devices and change the setting for Network Interface Card to On. b.

  • Page 23: Expansion-Card Guide

    Back to Contents Page Expansion-Card Guide Dell™ OptiPlex™ GX400 Service Manual    Removing the Expansion-Card Guide   Replacing the Expansion-Card Guide Removing the Expansion-Card Guide CAUTION: Before you perform this procedure, see "Precautionary Measures." NOTICE: Before disconnecting a device from the computer or removing a component from the system board, verify that the standby power light on the system board has turned off.
  • Page 24 Back to Contents Page      ...

  • Page 25: Removing The Front Panel

    Back to Contents Page Front Panel Dell™ OptiPlex™ GX400 Service Manual    Removing the Front Panel   Replacing the Front Panel Removing the Front Panel CAUTION: Before you perform this procedure, see "Precautionary Measures." 1.  Turn off the computer and devices, disconnect them from their electrical outlets, wait at least 5 seconds, and then remove the computer cover.

  • Page 26: Front Panel Buttons

    Back to Contents Page Front-Panel Buttons Dell™ OptiPlex™ GX400 Service Manual    Removing Front-Panel Buttons   Replacing Front-Panel Buttons Removing Front-Panel Buttons 1.  Turn off the computer and devices, disconnect them from their electrical outlets, wait at least 5 seconds, and then remove the computer cover.
  • Page 27  ...

  • Page 28: Removing Front-Panel Inserts

    Back to Contents Page Front-Panel Inserts Dell™ OptiPlex™ GX400 Service Manual    Removing Front-Panel Inserts   Replacing Front-Panel Inserts Removing Front-Panel Inserts CAUTION: Before you perform this procedure, see "Precautionary Measures." 1.  Turn off the computer and devices, disconnect them from their electrical outlets, wait at least 5 seconds, and then remove the computer cover.

  • Page 29: Inside Your Computer

    Back to Contents Page Inside Your Computer Dell™ OptiPlex™ GX400 Service Manual    Chassis Interior Chassis Interior Chassis Interior   NOTE: Before you remove the cover, you must first slide the outer padlock ring to the left to unlock the cover release mechanism. See "Cover Release Mechanism."...

  • Page 30: System Memory

    Back to Contents Page System Memory Dell™ OptiPlex™ GX400 Service Manual    Removing a Memory Module   Replacing a Memory Module Removing a Memory Module CAUTION: Before you perform this procedure, see "Precautionary Measures." CAUTION: RIMMs can get very hot during system operation. Be sure that the RIMMs have had sufficient time to cool before you touch them.
  • Page 31 2 through step 5 of this procedure. 7.  When the System Memory total is correct, exit system setup. 8.  Run the Dell Diagnostics to verify that the memory modules are operating properly. Back to Contents Page      ...

  • Page 32: Removing The Microprocessor

    NOTE: If you are installing a microprocessor upgrade kit from Dell, return the original heat sink assembly and microprocessor package to Dell in the same package in which your upgrade kit was sent. Your microprocessor upgrade kit should include a replacement microprocessor heat sink and two replacement securing clips.

  • Page 33: Replacing The Microprocessor

    To remove the microprocessor, pull the socket lever straight up until the microprocessor is released. Then remove the microprocessor from the socket. Removing the Microprocessor   Replacing the Microprocessor NOTICE: Do not reuse the old heat sink assembly when replacing the microprocessor package. Doing so can cause the microprocessor to overheat because of an inadequate amount of thermal compound between the heat sink assembly and the microprocessor package.
  • Page 34 2.  Install the microprocessor heat sink: NOTICE: If you are installing a microprocessor upgrade kit from Dell, remove the plastic cover that is attached to the bottom of the new heat sink before installing it. a.  Lower the heat sink to the microprocessor so that the heat sink fits in the heat sink retention base.

  • Page 35: Removing The Microprocessor Cooling Fan

    Back to Contents Page Microprocessor Cooling Fan Dell™ OptiPlex™ GX400 Service Manual    Removing the Microprocessor Cooling Fan   Replacing the Microprocessor Cooling Fan Removing the Microprocessor Cooling Fan CAUTION: Before you perform this procedure, see "Precautionary Measures." NOTICE: Before disconnecting a device from the computer or removing a component from the system board, verify that the standby power lights on the system board has turned off.
  • Page 36      ...

  • Page 37: Removing The Microprocessor Airflow Shroud

    Back to Contents Page Microprocessor Airflow Shroud Dell™ OptiPlex™ GX400 Service Manual    Removing the Microprocessor Airflow Shroud   Replacing the Microprocessor Airflow Shroud Removing the Microprocessor Airflow Shroud CAUTION: Before you perform this procedure, see "Precautionary Measures." NOTICE: Before disconnecting a device from the computer or removing a component from the system board, verify that the standby power light on the system board has turned off.

  • Page 38: Rotating The Power Supply

    Back to Contents Page Power Supply Dell™ OptiPlex™ GX400 Service Manual    Rotating the Power Supply   Removing the Power Supply   Replacing the Power Supply Rotating the Power Supply To access some of the components on the system board, you may need to rotate the power supply out of the way.

  • Page 39: Replacing The Power Supply

    7.  Disengage the pivot pin on the left rear of the power supply from the chassis socket. Removing the Power Supply   8.  Lift the power supply away from the chassis. Replacing the Power Supply 1.  Insert the pivot pin on the left rear of the power supply into the chassis socket. 2.

  • Page 40: Removing The System Board

    Back to Contents Page System Board Dell™ OptiPlex™ GX400 Service Manual    Removing the System Board   Replacing the System Board Removing the System Board CAUTION: Before you perform this procedure, see "Precautionary Measures." NOTICE: Before disconnecting a device from the computer or removing a component from the system board, verify that the standby power light on the system board has turned off.

  • Page 41: Replacing The System Board

    8.  Run system setup to ensure that your settings are correct and that all system board components are correctly identified. 9.  Run the Dell Diagnostics to verify that the computer is operating properly. Back to Contents Page  ...

  • Page 42: System Board Components

    Back to Contents Page System Board Components Dell™ OptiPlex™ GX400 Service Manual    Components   Labels   Jumpers Components System Board Components   Labels   System-Board Labels  Connector or Component Label AGP connector AUX_LED Auxiliary hard-drive access light connector BATTERY Battery socket CD_IN CD audio input connector CPU_POWER...
  • Page 43 L_IN Line-in connector L_OUT Line-out/speaker connector Microphone connector MICROPROCESSOR Microprocessor with heat sink PS/2 mouse connector Network adapter connector PANEL Control-panel connector Parallel port connector PCIn PCI expansion-card connector POWER Computer power connector PSWD Password jumper RIMM_n RIMM socket RTCRST Real-time clock reset jumper Serial port connectors SPKR...
  • Page 44 Back to Contents Page      ...

  • Page 45: Notes, Notices, And Cautions

    Back to Contents Page Dell™ OptiPlex™ GX400 Service Manual    Notes, Notices, and Cautions 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.

  • Page 46: Removing The Vrm

    Back to Contents Page Dell™ OptiPlex™ GX400 Service Manual    Removing the VRM   Replacing the VRM Removing the VRM CAUTION: Before you perform this procedure, see "Precautionary Measures." NOTICE: Before disconnecting a device from the computer or removing a component from the system board, verify that the standby power light on the system board has turned off.
  • Page 47 Back to Contents Page      ...

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