Dell OptiPlex GX200 User Manual

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Dell™OptiPlex™GX200ServiceManual

Small Form-Factor Chassis — Removing and Replacing Parts

Low-Profile Chassis — Removing and Replacing Parts

Midsize 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:

Information in this document is subject to change without notice.

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: 18 April 2000

Last revised: 31 Jul 2000

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.

Back to Contents Page

Low-Profile Chassis — RemovingandReplacingParts:Dell™OptiPlex™GX200

Systems Service Manual

Overview

This section provides procedures for removing and replacing the components, assemblies, and subassemblies in the Dell OptiPlex low-profile

chassis GX200 system.

Unless otherwise noted, each procedure assumes that the following conditions exist:

l You have performed the steps in "Precautionary Measures."

l You have removed the computer cover.

l You can replace or reinstall a part by performing the removal procedure in reverse order unless additional information is provided.

Recommended Tools

Most of the procedures in this file require the use of one or more of the following tools:

l Small flat-blade screwdriver

l Wide flat-blade screwdriver

l #1 and #2 Phillips-head screwdrivers

l 1/4-inch nut driver

Also, use a wrist grounding strap as explained in "Precautionary Measures."

Precautionary Measures

Before you perform any procedure in this section, take a few moments to read the following caution for your personal safety and to prevent

damage to the system from electrostatic discharge (ESD).

Overview

System Power Supply

Recommended Tools

Expansion-Card Cage

Precautionary Measures

Riser Boards

Internal Views

System Board Components

Computer Cover

Expansion Cards

Eject, Power, and Reset Buttons

Memory

Front-Panel Inserts

Microprocessor/Cooling Fan/Heat Sink Assembly

Control Panel

System Battery

Chassis Intrusion Switch

System Board

Drives

CAUTION: FOR YOUR PERSONAL SAFETY AND PROTECTION OF THE EQUIPMENT

Before you start to work on the system, perform the following steps in the sequence listed:

1. Turn off the computer and all peripherals.

2. Disconnect the computer and peripherals from their electrical outlets. Also, disconnect any telephone or telecommunication lines from

the computer. Doing so reduces the potential for personal injury or shock.

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 the electrical outlet before disconnecting the peripheral or removing the component to avoid

Internal Views

Figure 1 shows a top view of the low-profile chassis to help you orient yourself when you work inside the computer.

Figure 1. Low-Profile Chassis Orientation View

Figure 2 shows the low-profile chassis with the cover removed.

Figure 2. Inside the Low-Profile Chassis

Computer Cover

Figure 3. Computer Cover Removal

possible 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,

periodically touch an unpainted metal surface on the computer chassis to dissipate any static electricity that might harm internal

components. Also avoid touching components or contacts on a card and avoid touching pins on a chip.

5. Verify that the auxiliary power indicator on the riser board is not on. If it is on, you may need to wait 10 to 30 seconds for it to go out

(see Riser Boards).

System board

Hard-disk drive

Power supply

Externally accessible drive bays

Diskette drive in upper bay

Diskette drive interface cable

Hard-disk drive interface cable

Hard-disk drive

Chassis intrusion switch

Expansion-card cage

Expansion-card slots

Security cable slot

I/O ports and connectors

AC power receptacle

Padlock ring

Power supply

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. Disengage the tabs that secure the cover to the top of the chassis, and lift the cover away.

Figure 4. Computer Cover Replacement

To replace the low-profile chassis computer cover, perform the following steps:

1. Face the front of the computer and hold the cover at a slight angle (see Figure 4).

2. Align the bottom of the cover with the bottom of the chassis and insert the hooks on the cover into the recessed slots on the computer

chassis so that the tabs catch the hooks inside the slots.

3. Pivot the cover down toward the back of the chassis and into position.

Make sure that the securing buttons click into place.

To reset the chassis intrusion detector, perform the following steps:

1. Reconnect all cables to their connectors at the back of the computer.

2. Restart the system.

3. Enter System Setup. To do this, press <F2> when F2=Setup appears in the upper-right corner of the screen.

If the operating system begins to load into memory, allow the system to complete the load operation, shut down the system, and try again.

4. Restore the system configuration settings.

5. While in System Setup, perform the following steps to configure the system if it has an LS-120 SuperDisk drive:

a. Set Diskette Drive A and Diskette Drive B to Not Installed.

b. Set Secondary Drive 0 or Secondary Drive 1, as appropriate, to Auto.

c. Go to the second page and set Diskette to Off.

6. While in System Setup, reset the chassis intrusion detector under the System Security tab by changing Chassis Intrusion to Enabled,

Enabled-Silent, or Disabled.

7. If no other changes are required in System Setup, press <Esc> and follow the menu directions to restart the system and implement the

changes.

8. Run the Dell Diagnostics to verify that the system is operating correctly.

Eject, Power, and Reset Buttons

Figure 5. Eject, Power, and Reset Button Removal

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. To remove the 3.5-inch diskette-drive eject button, pull gently on the plastic part of the button until it comes free.

3. To remove the power button or the reset button, use a small screwdriver and push in the two or three plastic clips that hold the button to the

bezel.Whentheseclipsarereleased,thebuttonscomefreefromthebezel.

Front-Panel Inserts

Figure6.5.25-Inch Front-Panel Insert Removal

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 top cover, use your thumbs to press inward on the insert until it snaps free of the cover.

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.

NOTE: If the system does not have an audio expansion card but does have an integrated audio controller, be sure that the

Sound setting is On. If the system has an audio expansion card, be sure that the Sound setting is Off.

Disk eject button

Reset button

Power button

Posts (2)

Front of top cover

Ring tabs (2)

Control Panel

Figure 7. Control Panel Removal

To remove the control panel in the low-profile chassis, perform the following steps:

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. Disconnect the chassis intrusion switch cable connector from the control panel.

4. Remove the control panel from the chassis.

When you reinstall the control panel, be sure to put the right side of the control panel behind the mounting tab.

Chassis Intrusion Switch

Figure 8. Chassis Intrusion Switch Removal

To remove the chassis intrusion switch in the low-profile chassis, perform the following steps:

1. Disconnect the chassis intrusion switch cable connector from the control panel on the front of the chassis as shown in Figure 8.

Note the routing of the chassis intrusion cable as you remove it from the chassis. Hooks on the chassis keep the cable in place.

2. Slide the chassis intrusion switch out of its slot to remove it from the chassis (see Figure 8).

3. Install the replacement chassis intrusion switch and cable.

4. Reset the chassis intrusion detector.

Control panel

Chassis intrusion switch

Control panel

Chassis intrusion switch

Drives

Figure 9. Drive Locations



3.5-Inch Diskette Drive

To remove the 3.5-inch diskette drive assembly from the drive shelf, perform the following steps:

1. Disconnect the DC power cable and the interface cable from the back of the drive.

2. Press both release latches on the left side of the 3.5-inch diskette drive.

3. Pivot the 3.5-inch diskette drive upward 1 inch (2.5 cm), and then pull the drive away from the notched tabs on the right chassis wall.

4. Remove the bracket from the diskette drive you just removed.

5.25-inch Drive

To remove the 5.25-inch drive/bracket assembly (the 5.25 drive is usually a CD-ROM drive), perform the following steps:

1. Remove the diskette drive and bracket.

2. Disconnect the DC power cable and EIDE cable from the drive.

3. Lift the 5.25-inch drive/bracket straight up and out of the chassis.

Hard-Disk Drive Removal

Figure 10. Hard-Disk Drive/Bracket Assembly Removal

To remove the hard-disk drive/bracket assembly, perform the following steps:

1. Disconnect the DC power cable and EIDE cable from the drive.

NOTE: In all of the following procedures, left and right refer to your left and right as you face the front of the computer.

5.25-inchdrive

3.5-inch diskette drive

Hard-disk drive

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.

Captive screw

Hinge tabs on back of drive bracket (2)

Slots in floor divider (3)

2. Loosen the captive screw securing the hard-disk drive/bracket to the bottom of the chassis.

3. Grasp the drive/bracket, and pivot it upward from the chassis until the two hinge tabs (located on the side opposite the screw) clear the floor

divider (see Figure 10). Then lift the bracket upward and out of the chassis.

4. To remove the hard-disk drive from the bracket, place the drive/bracket on a flat surface with the bracket facing up.

5. Remove the four screws that secure the bracket to the drive.

Figure 11. Hard-Disk Drive to Bracket Installation

To install a replacement hard-disk drive,performthefollowingsteps.

NOTICE: To avoid damaging the drive by ESD, ground yourself by touching an unpainted metal surface on the back of the computer.

NOTICE: When you unpack the drive, do not set it on a hard surface, which may damage the drive. Instead, set the drive on a

surface, such as a foam pad, that will sufficiently cushion it.

1. Prepare the drive for installation.

Check the documentation for the drive to verify that it is configured for your computer system.

2. If not already done, remove the computer cover.

3. To install the hard-disk drive to the bracket, place the drive top-down on a flat surface with the bracket mounting holes facing up.

4. Position the bracket over the holes and install four screws to secure the bracket to the drive.

5. Insert the bracket's hinge tabs into the chassis slots so that the tabs hook over the slots.

6. Rotate the bracket toward the chassis floor and secure the bracket with a screw.

7. Connect a power cable to the power input connector on the back of the drive (see Figure 12).

8. Check all connectors to ensure that they are properly cabled and firmly seated.

9. Connect one of the device connectors on the EIDE cable to the 40-pin interface connector on the back of the hard-disk drive.

NOTICE: You must match the red colored stripe on the EIDE cable with pin 1 on the drive's interface connector to avoid possible

damage to your system.

Figure 12. Hard-Disk Drive Cable Attachment

Hard-disk drive

Bracket

Screws (4)

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."

NOTICE: You must attach the blue connector on the EIDE interface cable to the IDE1 connector on the system board to avoid

possible damage to your system.

10. If it is not already connected, connect the blue connector on the EIDE interface cable to the IDE1 connector on the system board.

To locate the IDE1 connector on the system board, see "System Board Components."

11. Replace the computer cover.

12. Reset the chassis intrusion detector. While in System Setup, update the appropriate Primary Drive option, 0 or 1 (see the online System

User's Guide for complete information).

13. Partition and logically format your drive before you proceed to the next step.

See the documentation for your operating system for instructions.

14. If the drive you just installed is the primary drive, install your operating system on the hard-disk drive.

For instructions, refer to the documentation that came with your operating system.

System Power Supply

Figure 13. Power Supply Removal

To remove the system power supply, perform the following steps:

1. Disconnect the AC power cable from the back of the power supply.

2. DisconnecttheDCpowercablesfromthesystemboardandthedrives.

Power cable

EIDE interface cable

IDE1 connector on system board

AC power cord

AC power receptacle

Power supply

DC power cables

Securing screw

Note the routing of the DC power cables underneath the tabs in the chassis as you remove them from the system board and drives. It is

important to route these cables properly when you replace them to prevent them from being pinched or crimped.

3. Removethescrewbelowthefanguardonthebackofthechassis.

4. Slide the power supply toward the front of the computer approximately 1 inch.

5. Liftthepowersupplyupandoutofthechassis.

Expansion-Card Cage

Figure 14. Expansion-Card Cage Removal

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. Locatethesecuringlever(seeFigure14).Rotatetheleverupwarduntilitstopsinanuprightposition.

3. Slide the expansion-card cage out of the chassis.

4. Lift the expansion-card cage up and away from the chassis.

To replace the expansion-card cage into the low-profile chassis, perform the following steps:

1. With the securing lever in the upright position, align the expansion-card cage slots with the tabs in the chassis opening for the expansion-

card cage (see Figure 14). Slide the expansion-card cage into place.

2. Rotate the securing lever downward until it is flush with the top of the chassis. Make sure that the riser board is fully seated in the RISER

connector on the system board.

3. Reconnect any cables you removed in step 1 of the previous procedure.

Riser Boards

The low-profile chassis has a standard PCI riser board (see Figure 15) or an optional PCI/ISA riser board (see Figure 16). The PCI riser board

provides three PCI expansion-card slots. The PCI/ISA riser board provides one PCI expansion-card slot, one ISA expansion-card slot, and one

shared PCI/ISA expansion-card slot.

Figure 15. PCI Riser Board (Standard)

Securing lever

Expansion-card cage

Slots (2)

Tabs (2)

NOTICE: Use a wrist grounding strap as explained in "Precautionary Measures."

Figure 16. PCI/ISA Riser Board (Optional)

To remove the riser board, perform the following steps.

1. Remove the expansion-card cage.

2. Remove the expansion cards installed in the slots.

3. Remove the screws securing the riser board to the expansion-card cage.

4. Lift the riser board off the expansion-card cage.



System Board Components

Figure 17 shows the system board and the location of all its sockets and connectors.

Figure 17. System Board Components

Auxiliary power indicator LED (AUX_LED)

Wakeup On LAN (WOL) connector

PCI expansion slot 1 (PCI1)

PCI expansion slot 2 (PCI2)

PCI expansion slot 3 (PCI3)

Auxiliary power LED (AUX_LED)

ISA expansion-card connector 1 (ISA1)

ISA expansion-card connector 2 (ISA2)

Remote Wakeup header (WOL)

PCI expansion-card connector 1 (PCI1)

PCI expansion-card connector 2 (PCI2)

NOTE: The ISA expansion-card connector 1 and PCI expansion-card connector 2 share an expansion slot; only one of these two

connectors can be used at any given time.

CAUTION: Ground yourself by touching an unpainted metal surface on the back of the computer.

Line-in connector

System Board Jumpers

Figure 18 shows the location of the jumpers on the system board. Table 1 lists the system board jumpers and their settings.

Figure 18. System Board Jumpers

Jumpers are small blocks on a circuit board with two or more pins emerging from them. Plastic plugs containing a wire fit down over the pins. The

wire connects the pins and creates a circuit.

NOTICE: Make sure your system is turned off before you change a jumper setting. Otherwise, damage to your system or

unpredictable results may occur.

To change a jumper setting, pull the plug off its pin(s) and carefully fit it down onto the pin(s) indicated.

Line-out connector

Microphone connector

NIC connector

Video connector

Serial port 2 connector

USB connectors (2)

Keyboard (lower) and mouse (upper) connectors

Parallel port (upper) and serial port 1 (lower) connectors

Microprocessor connector

RIMM sockets (2)

DC power 1 connector

DC power 2 connector

Chassis intrusion connector

Control panel connector

External speaker connector

EIDE1 connector

EIDE2 connector

System board speaker

System board jumpers

Diskette/tape-drive connector

Riser board connector

Real-time clock reset (RTCRST) jumper

Battery

Modem audio connector

Fan connector

CD audio cable connector

Table 1. System-Board Jumper Settings

System Board Labels

Table 2 lists the labels for connectors and sockets on your system board, and it gives a brief description of their functions.

Table 2. System Board Connectors and Sockets

Expansion Cards

Each GX200 low-profile chassis can accommodate 32-bit PCI expansion cards and 16-bit and 8-bit ISA expansion cards, depending on the

installedriserboard.SeeFigure19forexamplesoftheexpansioncards.

Figure 19. Expansion Cards

Jumper

Setting

Description

PSWD

 (default)

Password features are enabled.



 (default)

Password features are disabled.

SAFE

 (default)

Reserved (do not change).

BIOS

 (default)

Reserved (do not change).

RTCRST

 (default)

Real-time clock reset. Can be used for troubleshooting purposes.

 jumpered unjumpered

Connector or Socket

Description

AMC

ATI multimedia channel connector

BATTERY

Battery socket

CD_IN

CD-ROM audio interface connector

RIMM_x

RIMM socket

DSKT

Diskette/tape drive interface connector

ENET

Integrated NIC connector

EXT_SPKR

External speaker connector

FAN

Microprocessor fan connector

HDLED

Hard-disk drive LED connector

IDEn

EIDE interface connector

INTRUDER

Chassis intrusion switch connector

KYBD

Keyboard connector

MODEM

Modem audio connector

MONITOR

Video connector

MOUSE

Mouse connector

PANEL

Control panel connector

PARALLEL

Parallel port connector; sometimes referred to as LPT1

PCIn*

PCI expansion-card connector

POWER_1

Main power input connector

POWER_2

3.3-V power input connector

RISER

Riser board connector

SERIALn

Serial port connector

SLOT1_PRI

Primary microprocessor connector

USB

USB connectors

Expansion-Card Removal

To remove an expansion card, perform the following steps:

1. 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. Grasp the card by its outside corners, and ease it out of its connector.

5. If you are removing the card permanently, install a metal filler bracket over the empty card-slot opening.

6. Replace the computer cover and reset the chassis intrusion detector.

Expansion-Card Installation

Figure 20. Expansion-Card Installation

To install an expansion card, perform the following steps:

1. Prepare the expansion card for installation, and remove the computer cover.

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).

Save the screw to use when installing the expansion card later in this procedure.

Figure 21. Filler Bracket Removal

8-bit ISA expansion card

16-bit ISA expansion card

32-bit PCI expansion card

NOTE: Installing filler brackets over empty card-slot openings is necessary to maintain Federal Communications Commission (FCC)

certification of the system. The brackets also keep dust and dirt out of your computer.

Expansion card

Card-edge connector

Riser board

Expansion-card connector

Expansion-card cage

CAUTION: Some network cards automatically start the system when they are connected. To guard

against electric shock, be sure to unplug your computer from its electrical outlet before installing any

expansion cards.

3. Insert the expansion card into the expansion-card connector.

If the expansion card is full-length, insert the front end of the card into the corresponding card guide on the inside front of the chassis as you

insert the card into its connector. Insert the card's edge connector firmly into the expansion-card slot.

4. When the card is firmly seated in the connector, secure the card's mounting bracket to the chassis with the screw you removed in step 2.

5. Connect any cables that should be attached to the card.

See the documentation for the card for information about the card's cable connections.

6. Replace the computer cover and reset the chassis intrusion detector.

Memory

To remove a Rambus in-line memory module (RIMM), perform the following steps:

1. Remove the computer cover.

2. Remove the system power supply to allow you to access the RIMMs.

3. Press the securing clips outward simultaneously until the RIMM disengages and pops out slightly from the socket (see Figure 22).

Figure 22. Removing a RIMM

To reinstall a RIMM, perform the following steps:

1. Locate the plastic securing clips at each end of the socket (see Figure 23).

2. Press the clips outward until they snap open.

3. Press the RIMM straight into the slot running down the center of the socket until the securing tabs snap into place around the ends of the

RIMM.

4. Replace the computer cover and reset the chassis intrusion detector.

Figure 23. Installing a RIMM

Filler bracket

Securing clips (2)



Microprocessor/Cooling Fan/Heat Sink Assembly

Figure 24. Microprocessor/Cooling Fan/Heat Sink Assembly

To replace a microprocessor, perform the following steps:

1. Remove the computer cover.

2. Disconnect the cooling fan power cable from its system board connector.

3. Remove the metal retaining clip that secures the heat sink assembly to the microprocessor package by gently pushing down on the folded

part of the retaining clip with a small screwdriver.

The retaining clip hooks over the sides of the zero insertion force (ZIF) socket.

4. Remove the heat sink assembly from the microprocessor package.

NOTICE: Be careful not to bend any of the pins when you remove the microprocessor package from the ZIF socket. Bending

the pins can permanently damage the microprocessor.

5. Detach and lift the microprocessor package away from the ZIF socket.

The ZIF socket has a lever-type handle that secures and releases the microprocessor package from the ZIF socket.

a. Pull the socket release lever straight out until the microprocessor package is released.

b. Remove the microprocessor package from the socket.

Leave the release lever extended so that the socket is ready for the new microprocessor.

Figure 25. Microprocessor Package Removal

Securing clips (2)

Notches (2)

Cooling fan/heat sink assembly

ZIF socket

Retaining clip

CAUTION: The microprocessor/heat sink assembly can get extremely hot. Be sure that the assembly has had sufficient time to

cool before you touch it.

NOTE: Dell recommends that only a technically knowledgeable person perform this procedure.

6. Unpack the new microprocessor package.

If any of the pins on the new microprocessor appear to be bent, return the microprocessor package.

NOTICE: You must position the microprocessor package correctly in the ZIF socket to avoid permanent damage to the

microprocessor and the computer when you turn on the system.

7. Install the microprocessor package in the ZIF socket.

a. If the release lever on the ZIF socket is not all the way out, move it to that position.

b. Align pin-1 (the beveled corner) of the microprocessor package and pin-1 of the ZIF socket.

c. Set the microprocessor package lightly in the socket, making sure that all the pins are headed into the correct holes.

Because the system uses a ZIF socket, there is no need to use force (which could bend the pins if the microprocessor package is

misaligned).

d. When the microprocessor package is positioned correctly, press it with minimal pressure to fully seat it in the ZIF socket.

e. When the microprocessor package is fully seated, pivot the release lever back toward the system board until it snaps into place,

securing the microprocessor package.

Figure 26. Microprocessor Package Installation

8. Unpack the heat sink included in the replacement kit.

NOTICE: Do not reuse the old heat sink assembly when you replace the microprocessor package. Using the old heat sink

assembly can cause the microprocessor to overheat because there is not enough thermal compound between the old heat

sink assembly and the microprocessor package.

9. Replace the heat sink assembly.

a. Peel the release liner from the adhesive tape attached to the bottom of the new heat sink assembly.

b. Replace the computer cover and restart the system.

c. Reset the chassis intrusion detector. While in System Setup, confirm that the system data area correctly identifies the type of

microprocessor installed.

System Battery

Figure 27. System Battery Removal

Microprocessor package

Socket release lever

ZIF socket

Microprocessor

ZIF socket

Pin-1 (beveled corner)

To remove the system battery, perform the following steps:

1. If possible, enter System Setup and print the System Setup screens.

2. Remove the system battery by carefully prying it out of its socket with your fingers or with a blunt, nonconducting object such as a plastic

screwdriver.

When you replace the system battery, orient the new battery with the "+" facing up. Insert the battery into its socket and snap it into place.

System Board

Figure 28. 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 computer cover.

3. Remove the expansion-card cage.

4. Remove the 5.25-inch drive.

5. Disconnect all cables from the system board.

6. Remove the screw that secures the system board to the bottom of the chassis (see Figure 28).

7. Slide the system board toward the front of the chassis until it stops.

8. Carefully lift the system board out of the chassis (be sure to lift evenly and not twist the system board).

To replace the system board, perform the following steps:

1. Remove the RIMMs and the microprocessor/cooling fan/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 you are installing a

microprocessor upgrade.

3. Push down near each slot to engage the grounding clip onto its corresponding tab.

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.

Systemboard

Screw

4. Push evenly on both sides of the system board as you slide and lock it into position (do not twist the system board).

5. Reconnect all cables to the system board.

6. Replace the 5.25-inch drive.

7. Replace the expansion-card cage.

8. Replace the computer cover.

9. Reset the chassis intrusion detector. While in System Setup, confirm that the system data area correctly identifies the type of

microprocessor installed.

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Midsize Chassis — Removing and Replacing Parts: Dell™OptiPlex™GX200System

Service Manual

Overview

This section provides procedures for removing and replacing the components, assemblies, and subassemblies in the Dell OptiPlex 200 midsize

chassis system.

Unless otherwise noted, each procedure assumes that the following conditions exist:

l You have performed the steps in "Precautionary Measures."

l You have removed the computer cover.

You can replace or reinstall a part by performing the removal procedure in reverse order unless additional information is provided.

Recommended Tools

The procedures in this file require the use of a #2 Phillips-head screwdriver.

Also, use a wrist grounding strap as explained in "Precautionary Measures."

Precautionary Measures

Before you perform any procedure in this section, take a few moments to read the following caution for your personal safety and to prevent

damage to the system from electrostatic discharge (ESD).

Overview

System Power Supply

Recommended Tools

System Board Components

Precautionary Measures

Expansion Cards

Computer Cover

Riser Boards

Internal View

Memory

Front-Panel Inserts

Microprocessor/Airflow Shroud/Heat Sink Assembly

Expansion-Card Cage

System Battery

Control Panel

System Board

Drives

CAUTION: FOR YOUR PERSONAL SAFETY AND PROTECTION OF THE EQUIPMENT

Before you start to work on the system, perform the following steps in the sequence listed:

1. Turn off the computer and all peripherals.

2. Disconnect the computer and peripherals from their electrical outlets. Also, disconnect any telephone or telecommunication lines from

the computer. Doing so reduces the potential for personal injury or shock.

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 the electrical outlet before disconnecting the peripheral or removing the component to avoid

possible 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,

periodically touch an unpainted metal surface on the computer chassis to dissipate any static electricity that might harm internal

components. Also avoid touching components or contacts on a card and avoid touching pins on a chip.

5. Verify that the standby power indicator

on the riser board is not on. If it is on, you may need to wait 10 to 30 seconds for it to go out (see

Computer Cover

Figure 1. Computer Cover Removal

To remove the computer cover, perform the following steps:

1. Turn off your computer and peripherals, and observe the caution for your personal safety and protection of the equipment described in

"Precautionary Measures."

2. If you have installed a padlock through the padlock ring on the back panel, remove the padlock.

3. Press in on the two securing buttons until the cover is free to swing up (see Figure 1).

4. Raise the back of the cover, and pivot it toward the front of the computer.

5. Lift the cover off the hooks at the front of the chassis.

Figure 2. Computer Cover Replacement

To replace the computer cover, perform the following steps:

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. Facing the left side of the computer, hold the cover at a slight angle as shown in Figure 2.

3. Fit the three cover hooks into the rectangular slots on the chassis. (It might be helpful to look down into the chassis to verify that the hooks are

in place.)

4. Pivot the cover down toward the back and into position. Make sure that the two securing buttons click into place.

To reset the chassis intrusion detector, perform the following steps:

1. Reconnect all cables to their connectors at the back of the computer.

Riser Boards).

Securing buttons (2)

Release buttons (2)

Hooks in slots (4)

2. Restart the system.

3. Enter System Setup. To do this, press <F2> when F2=Setup appears in the upper-right corner of the screen.

If the operating system begins to load into memory, allow the system to complete the load operation, shut down the system, and try again.

4. Restore the system configuration settings.

5. While in System Setup, perform the following steps to configure the system if it has an LS-120 SuperDisk drive:

a. Set Diskette Drive A and Diskette Drive B to Not Installed.

b. Set Secondary Drive 0 or Secondary Drive 1, as appropriate, to Auto.

c. Go to the second page and set Diskette to Off.

6. While in System Setup, reset the chassis intrusion detector under the System Security tab by changing Chassis Intrusion to Enabled,

Enabled-Silent, or Disabled.

7. If no other changes are required in System Setup, press <Esc> and follow the menu directions to reboot the system and implement the

changes.

8. Run the Dell Diagnostics to verify that the system is operating correctly.

Internal View

Figure 3 shows the chassis with the cover removed.

Figure 3. Inside the Chassis

Front-Panel Inserts

Figure4.5.25-Inch Front-Panel Insert Removal (cutaway view through top of cover)

NOTE: If the system does not have an audio expansion card but does have an integrated audio controller, be sure that the

Sound setting is On. If the system has an audio expansion card, be sure that the Sound setting is Off.

Drive in upper bay

Internal drive cage

Chassis intrusion switch

Drive interface cable

Expansion-card cage

Security cable slot

I/O ports and connectors

AC power receptacle

Padlock ring

Power supply

System board

Drive interface cable

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 top cover, use your thumbs to press inward on the insert until it snaps free of the cover.

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.

Expansion-Card Cage

Figure 5. Control Panel Removal

To remove the card cage, complete the following steps:

1. Rotate the lever toward the back of the computer until it stops in the upright position.

2. Lift the expansion-card cage up and away from the computer.

To replace an expansion-card cage, keep the cage flush against the chassis to ensure that the lever engages the notch when the lever is

depressed.

Control Panel

Figure 6. Control Panel Removal

5.25-inch front-panel insert

Ring tabs (2)

Posts (2)

Slots (2)

Tabs (2)

Securing lever

To remove the control panel, perform the following steps:

1. Remove the hard-disk drive cage.

2. Disconnect the control panel cable from the PANEL connector on the system board (see Figure 14 or the internal service label for the

location of the PANEL connector).

3. Remove the mounting screw holding the control panel to the chassis.

4. Slide the control panel out of the hooks holding it to the chassis.

Note the routing of the control panel cable as you remove it from the chassis.

To reinstall the control panel, perform the removal procedure in reverse.

Drives

3.5-Inch Diskette Drive Removal

To remove the 3.5-inch diskette drive assembly, perform the following steps:

1. Remove the computer cover.

2. Disconnect the DC power and cables from the diskette drive.

3. Remove the mounting screw (see Figure 7).

4. Rotate the diskette drive upward and lift it free.

When you replace the 3.5-inch diskette drive on the bracket, be sure that the two retaining tabs on the right side of the bracket engage the

mounting holes in the side of the 3.5-inch diskette drive. Rotate the drive down. Then replace the screw that holds the diskette drive to the bracket.

Figure 7. 3.5-Inch Diskette Drive Bracket

5.25-Inch Drive Removal

To remove a device from an externally accessible drive bay, perform the following steps:

1. Remove the computer cover.

Chassis hooks (2)

Mounting screw

Control panel

Control panel cable

NOTE: In all of the following procedures, left and right refer to your left and right as you face the front of the computer.

3.5-inch diskette drive

Retaining tabs (2)

Bracket

Screw

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