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Dell OptiPlex GX100 Service Manual
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Dell OptiPlex GX100 Service Manual

Dell OptiPlex GX100 Service Manual

Service manual
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Download this manual See also: User Manual
Dell™ OptiPlex™ GX100 Systems  Service Manual
Small-Form-Factor Chassis — Removing and Replacing Parts
Low-Profile Chassis — Removing and Replacing Parts
Mini Tower Chassis — Removing and Replacing Parts
Notes, Notices, and Cautions
Throughout this guide, blocks of text may be accompanied by an icon and printed in bold type or in italic type. These blocks are notes, notices,
and cautions, and they are used as follows:
NOTE: A NOTE indicates important information that helps you make better use of your system.
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.
© 1999-2000 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 and OptiPlex 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.
Initial release: May 1999
Last revised: 24 Aug 2000

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Summary of Contents for Dell OptiPlex GX100

  • Page 1 Information in this document is subject to change without notice. © 1999-2000 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 and OptiPlex are trademarks of Dell Computer Corporation.

  • Page 2: Recommended Tools

    System Battery System Board  Overview This section provides procedures for removing and replacing the components, assemblies, and subassemblies in the Dell OptiPlex low-profile chassis GX100 system. Unless otherwise noted, each procedure assumes that the following conditions exist: You have performed the steps in "Precautionary...

  • Page 3: Internal Views

    3. If you are disconnecting a peripheral from the computer or are removing a component from the system board, wait 10 to 20 seconds after disconnecting the computer from AC power before disconnecting the peripheral or removing the component to avoid possible damage to the system board.

  • Page 4: Eject, Power, And Reset Buttons

    To remove the low-profile chassis computer cover, perform the following steps: 1. Press in on the two securing buttons until the cover is free to swing up (see Figure 3). 2. Raise the back  of the cover, and pivot it toward the front of the computer. 3. Lift the cover off the hooks at the front of the chassis. 4.

  • Page 5: Front-Panel Inserts

    1 Disk eject button 2 Reset button 3 Power button To remove the eject, power, and reset buttons, perform the following steps: 1. Lay the computer cover on a flat work surface, with the inside of the top cover facing up. 2.

  • Page 6: Chassis Intrusion Switch

    1. Disconnect the control panel cable from the PANEL connector on the system board (see "System Board Labels" for the location of the PANEL connector). 2. From inside the chassis, remove the mounting screw that secures the control panel to the chassis. 3.
  • Page 7 1 5.25-inch  drive 2 3.5-inch diskette drive 3 Hard-disk drive 4 Chassis intrusion switch NOTE: Computer configurations differ. Your computer may have an Iomega Zip drive installed instead of a 3.5-inch diskette drive, or your computer may have no externally accessible drives installed. 3.5-Inch Diskette Drive To remove the 3.5-inch diskette drive assembly from the drive shelf, perform the following steps: 1.
  • Page 8 1 Hard-disk drive 2 Bracket 3 Screws (4) To install a replacement hard-disk drive, perform the following steps.   CAUTION: To avoid the possibility of electric shock, turn off the computer and any peripherals, disconnect them from electrical outlets, and then wait at least 5 seconds before you remove the computer cover. Also, before you install a drive, see the other precautions in "Precautionary Measures."...

  • Page 9: System Power Supply

    (including Microsoft®Windows NT®, when using a FAT16 file system) do not support drive partitions larger than 2 GB. 17. Test the hard-disk drive by running the Dell Diagnostics (see the online System User's Guide for complete information. 18. If the drive you just installed is the primary drive, install your operating system on the hard-disk drive.

  • Page 10: Expansion-Card Cage

    5. Lift the power supply up and out of the chassis.   Expansion-Card Cage Figure 14. Expansion-Card Cage Removal 1 Securing lever 2 Expansion-card cage 3 Slots (2) 4 Tabs (2) To remove the expansion-card cage, perform the following steps: 1. Examine any cables connected to expansion cards through the back-panel openings and disconnect any cables that will not reach to where the cage must be placed upon removal from the chassis.

  • Page 11: System Board Components

    1 Standby power indicator (AUX_LED) 2 ISA expansion slot 1 (ISA1; shared with PCI2) 3 ISA expansion slot 2 (ISA2) 4 Remote Wakeup header (WOL) 5 PCI expansion slot 1 (PCI1) 6 PCI expansion slot 2 (PCI2; shared with ISA1) To remove the riser board, perform the following steps.

  • Page 12: Expansion Cards

    To change a jumper setting, pull the jumper off its pin(s) and either remove it entirely, or carefully fit it down onto the pin(s) indicated. Dell shipped your computer with a PSWD jumper installed, meaning that password features for this computer are enabled. When you remove the jumper, or when you install the jumper on only one of the two pins, the password features are disabled.
  • Page 13 Expansion-Card Removal CAUTION: Use a wrist grounding strap as explained in "Precautionary Measures." To remove an expansion card, perform the following steps: Remove the computer cover. 2. If necessary, disconnect any cables connected to the card. 3. Remove the screw on the mounting bracket of the card you want to remove. 4.
  • Page 14 See the documentation that came with the expansion card for information on configuring the card, making internal connections, or otherwise customizing it for your system. 2. Remove the screw and remove the metal filler bracket that covers the card-slot opening for the expansion-card slot you intend to use (see Figure 21).

  • Page 15: Microprocessor/Heat Sink Assembly

    CAUTION: Use a wrist grounding strap as explained in "Precautionary Measures." NOTE: Dell recommends that only a technically knowledgeable person perform this procedure. To replace a microprocessor, perform the following steps: Remove the computer cover.
  • Page 16 1 Microprocessor chip 2 Release lever 3 Microprocessor socket CAUTION: Ground yourself by touching an unpainted metal surface on the back of the computer. 8. Unpack the new microprocessor. NOTICE: Be careful not to bend any of the pins when unpacking the microprocessor. Bending the pins can permanently damage the microprocessor.

  • Page 17: System Battery

    As the system boots, it detects the presence of the new microprocessor and automatically changes the system configuration information in System Setup. 16. Enter System Setup and confirm that the Microprocessor category correctly identifies the installed microprocessor. 17. Run the Dell Diagnostics to verify that the new microprocessor is operating correctly. System Battery Figure 28. System Battery Removal...

  • Page 18: System Board

    System Board Figure 29. System Board Removal To remove the system board, perform the following steps: 1. Disconnect all cables from their connectors at the back of the computer. 2. Remove the expansion-card cage. 3. Disconnect all cables from the system board. 4.
  • Page 19 System Battery System Board Overview This section provides procedures for removing and replacing the components, assemblies, and subassemblies in the Dell OptiPlex mini tower chassis GX100 system. Unless otherwise noted, each procedure assumes that the following conditions exist: You have performed the steps in "Precautionary...

  • Page 20: Internal Views

    3. If you are disconnecting a peripheral from the computer or are removing a component from the system board, wait 10 to 20 seconds after disconnecting the computer from AC power before disconnecting the peripheral or removing the component to avoid possible damage to the system board.
  • Page 21 To remove the mini tower computer cover, perform the following steps: 1. Face the back of the computer and slide the upper half of the padlock ring to the left to unlock the cover release mechansism (see figure 3). 2. Face the left side cover and press the release button, located at the bottom-left corner of the front bezel (see Figure 3). 3.
  • Page 22 1 Tab release 2 Retaining hooks (2) To remove the front bezel, perform the following steps: 1. While pressing the tab release marked with the icon, tilt the bezel away from the chassis. 2. Disengage the two retaining hooks at the bottom of the bezel. 3.

  • Page 23: Control Panel

    Front-Panel Inserts Figure 7.  5.25-Inch Front-Panel Insert Removal 1 Front panel insert 2 Bezel 3 Ring tab (2) To remove a 5.25-inch front-panel insert, perform the following steps: 1. Hold the bezel with the front facing you. 2. From the front of the bezel, use your thumbs to press inward on the insert until it snaps free of the bezel. To replace a 5.25-inch front-panel insert, position the two ring-tabs over the posts on the inside of the bay opening, and then press the ring tabs over the posts.

  • Page 24: Chassis Intrusion Switch

    5. Pull the control panel cable through the opening in the front wall, and carefully remove the cable from the routing tab in the chassis. 6. Pull out on the control panel to detach it from the chassis. Note the routing of the control panel cable as you remove it from the chassis. Chassis Intrusion Switch Figure 9. Chassis Intrusion Switch  Removal 1 Control panel...
  • Page 25 1 3.5-inch diskette drive 2 5.25-inch drive slots (3) 3 3.5-inch internal bay for hard-disk drives (2) 3.5-Inch Diskette Drive Figure 11. Removing a Diskette Drive From a Drive Bay 1 Release tab To remove the 3.5-inch diskette drive from the drive bay, perform the following steps: 1.
  • Page 26 1 Bracket tabs (2) To remove a 5.25-inch drive from a drive bay, perform the following steps. NOTE: For easier access inside the chassis, you may want to rotate the power supply out of the way temporarily. Remove the front bezel.
  • Page 27 1 5.25-inch drive           NOTICE: You must match the colored strip on the cable with pin 1 on the drive's interface connector to avoid possible damage to your system. 8. Connect a DC power cable to the power input connector on the back of the drive (see Figure 15). Figure 15. 5.25-Inch Drive Cables Attachment 1 DC power cable 2 EIDE interface connector (on drive) 9.
  • Page 28 To remove a hard-disk drive from the mini tower's internal hard-disk drive bracket, perform the following steps. CAUTION: To avoid the possibility of electric shock, turn off the computer and any peripherals, disconnect them from electrical outlets, and then wait at least 5 seconds before you remove the computer cover. Also, before you remove a drive, see the other precautions in "Precautionary Measures."...
  • Page 29 If you are installing a drive in the 1.6-inch bay, use the four screw holes in the side of the bracket (see Figure 17). If you are installing a drive in the 1-inch bay, use the four screw holes in the bottom of the bracket. 6.

  • Page 30: System Power Supply

    11. If the drive you just installed is the primary drive, insert a bootable diskette (such as the Dell Diagnostics Diskette) into drive A. 12. Turn on the computer system. 13. Enter System Setup and update the appropriate Primary Drive option, 0 or 1 (see the online System User's Guide for complete information on System Setup).
  • Page 31 To remove the expansion-card cage, perform the following steps: 1. Examine any cables connected to expansion cards through the back-panel openings and disconnect any cables that will not reach to where the cage must be placed upon removal from the chassis. 2.

  • Page 32: System Board Components

    1 PCI expansion slot 1 (PCI1) 2 PCI expansion slot 2 (PCI2) 3 PCI expansion slot 3 (PCI3) 4 PCI expansion slot 4 (PCI4; shared with ISA1) 5 ISA expansion slot 1 (ISA1; shared with PCI4) 6 Standby power indicator LED (AUX_LED) 7 ISA expansion slot 4 (ISA4) 8 ISA expansion slot 3 (ISA3) 9 ISA expansion slot 2 (ISA2;...

  • Page 33: Expansion Cards

    To change a jumper setting, pull the jumper off its pin(s) and carefully fit it down onto the pin(s) indicated. Dell shipped your computer with a PSWD jumper installed, meaning that password features for this computer system are enabled. When you remove the jumper, or when you install the jumper on only one of the two pins, the password features for this computer system are disabled.
  • Page 34 Expansion Card Removal CAUTION: Use a wrist grounding strap as explained in "Precautionary Measures." To remove an expansion card, perform the following steps: Remove the computer cover. 2. If necessary, disconnect any cables connected to the card. 3. Remove the screw from the mounting bracket of the card you want to remove. 4.
  • Page 35 CAUTION: Some network cards automatically start up the system when they are connected. To guard against electrical shock, be sure to unplug your computer from its electrical outlet before installing any expansion cards. To install an expansion card, perform the following steps: 1.

  • Page 36: Microprocessor/Heat Sink Assembly

    CAUTION: Use a wrist grounding strap as explained in Precautionary Measures. NOTE: Dell recommends that only a technically knowledgeable person perform this procedure. To replace a microprocessor, perform the following steps: Remove the computer cover.
  • Page 37 5. Press down on the folded part of the clip with a small screwdriver to release the clip (see Figure 30).  The securing clip hooks over tabs on the sides of the socket. NOTICE: Be careful not to bend any of the pins when removing the microprocessor from its socket. Bending the pins can permanently damage the microprocessor.

  • Page 38: System Battery

    As the system boots, it detects the presence of the new microprocessor and automatically changes the system configuration information in System Setup. 16. Enter System Setup and confirm that the Microprocessor category correctly identifies the installed microprocessor. 17. Run the Dell Diagnostics to verify that the new microprocessor is operating correctly. System Battery Figure 35. System Battery Removal...

  • Page 39: System Board

       Battery    Socket CAUTION: There is a danger of the new battery exploding if it is incorrectly installed. Replace the battery only with the same or equivalent type recommended by the manufacturer. Discard used batteries according to the manufacturer’s instructions. To remove the system battery, perform the following steps: 1.
  • Page 40 board). Back to Contents Page...
  • Page 41 System Battery System Board  Overview This section provides procedures for removing and replacing the components, assemblies, and subassemblies in the Dell OptiPlex small-form- factor chassis GX100 system. Unless otherwise noted, each procedure assumes that the following conditions exist: You have performed the steps in "Precautionary...
  • Page 42 damage to the system board. 4. Wear a wrist grounding strap, and clip it to an unpainted metal surface, such as the padlock loop on the back of the chassis. If a wrist grounding strap is not available, touch any unpainted metal surface on the back of the computer or on the computer chassis, such as the power supply, to discharge any static charge from your body before touching anything inside the computer.  While you work, ...
  • Page 43 1   Padlock ring 2   Securing buttons (2)               To remove the computer cover, perform the following steps: 1. Press in to retract the padlock ring into the cover to open (see Figure 3). 2. Press in on the two securing buttons until the cover is free to swing up (see Figure 3). 3. Raise the back of the cover, and pivot it toward the front of the computer. 4.
  • Page 44 1 Diskette eject button 2 Power button To remove the eject and power buttons, perform the following steps: 1. Lay the computer cover on a flat work surface, with the inside of the top cover facing up. 2. To remove the 3.5-inch diskette-drive eject button, pull gently on the plastic part of the button until it comes free. 3.
  • Page 45 1 Control panel 2 Chassis intrusion switch To remove the chassis intrusion switch, perform the following steps: Remove the drive shelf. Remove the power supply. Remove the control panel. 4. Disconnect the chassis intrusion switch cable connector from the control panel. Note the routing of the chassis intrusion cable as you remove the cable from the chassis.
  • Page 46 1 Drive shelf 2 Release tabs (2) To remove the drive shelf from the chassis, perform the following steps: 1. Disconnect the power and interface cables from the diskette drive and CD-ROM drive. 2. Press inward on the two drive shelf release tabs, and pull the shelf forward and out of the chassis (see Figure 9). Hard-Disk Drive Figure 10.
  • Page 47 1 Drive 2 Drive bracket 3 Screws (4) Figure 12. Hard-Disk Drive/Bracket Replacement 1 Tabs on bottom of drive bracket 2 Hooks on chassis floor 3 Drive bracket 4 Release tabs (2) To install a replacement hard-disk drive in the chassis, perform the following steps. CAUTION: To avoid the possibility of electric shock, turn off the computer and any peripherals, disconnect them from electrical outlets, and then wait at least 5 seconds before you remove the computer cover.
  • Page 48 2 GB. 16. Test the hard-disk drive by running the Dell Diagnostics (see the online System User's Guide for complete information). 17. If the drive you just installed is the primary drive, install your operating system on the hard-disk drive.
  • Page 49 3. Ensure that the latch on the left side of the 3.5-inch diskette drive engages the top of the diskette drive. If necessary, press on the latch from the bottom of the drive shelf. 4. Replace the drive shelf and connect the interface and power cable connectors. CD-ROM Drive Figure 14.
  • Page 50 Set the Drive 1 option under Drives: Primary to Auto. See the online System User's Guide for more information. 5. Verify that your system works correctly by running the Dell Diagnostics (see the online System User's Guide for complete information).

  • Page 51: Riser Board

    Remove the computer cover. NOTICE: Use a wrist grounding strap as explained in "Precautionary Measures."    2. Examine the cables connected to expansion cards through the back-panel openings, and disconnect any cables that will not reach to where the cage must be placed when it is removed from the chassis. 3.
  • Page 52 To change a jumper setting, pull the jumper off its pin(s) and carefully fit it down onto the pin(s) indicated. Dell shipped your computer with a PSWD jumper installed, meaning that the password features for this computer are enabled. When you remove the jumper, or when you install the jumper on only one of the two pins, the password features are disabled.
  • Page 53 ENET Integrated NIC connector Microprocessor fan connector EIDE interface connector IDEn KYBD Keyboard connector MICROPROCESSOR Microprocessor connector MONITOR Video connector MOUSE Mouse connector PANEL Control panel connector PARALLEL Parallel port connector; sometimes referred to as LPT1 POWER_1 Main power input connector POWER_2 3.3-volt (V) power input connector RISER...
  • Page 54 NOTE: If a setup password has been assigned by someone else, contact your network administrator for information on resetting the chassis intrusion detector. Figure 23. Expansion Card Installation 1 Expansion card 2 Card-edge connector 3 Riser board 4 Expansion-card connector 5 Expansion-card cage CAUTION: Use a wrist grounding strap as explained in "Precautionary...
  • Page 55 See the User's Guide for detailed information on the chassis intrusion detector. NOTE: If a setup password has been assigned by someone else, contact your network administrator for information on resetting the chassis intrusion detector. DIMMs Figure 25. DIMM Removal 1 Ejectors (2)  ...
  • Page 56 CAUTION: Use a wrist grounding strap as explained in "Precautionary Measures." NOTE: Dell recommends that only a technically knowledgeable person perform this procedure. To replace a microprocessor, perform the following steps: Remove the computer cover.
  • Page 57 As the system boots, it detects the presence of the new microprocessor and automatically changes the system configuration information in System Setup. 17. Enter System Setup and confirm that the Microprocessor option correctly identifies the installed microprocessor. 18. Run the Dell Diagnostics to verify that the new microprocessor operates correctly.
  • Page 58 System Battery Figure 31. System Battery Removal 1 Battery 2 Battery socket   CAUTION: There is a danger of the new battery exploding if it is incorrectly installed. Replace the battery only with the same or equivalent type recommended by the manufacturer. Discard used batteries according to the manufacturer’s instructions. To remove the system battery, perform the following steps: 1.
  • Page 59 1. Remove the DIMMs and the microprocessor/heat sink assembly and install them on the replacement board. 2. Set the jumpers on the new system board so that they are identical to those on the old board, unless a microprocessor upgrade is being installed.

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