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Inside Your Computer: Dell™ OptiPlex™ GX200 System User's Guide

	Overview		System Board Labels
	Internal Views		Rotating the Power Supply Away From the System Board (Midsize and Mini Tower Chassis Only)
	System Board Components		Removing and Replacing the Front Bezel (Mini Tower Chassis Only)
	System Board Jumpers		Removing and Replacing the Expansion-Card Cage

Overview

This section describes the inside of your computer and may be used as a reference before performing an upgrade procedure.

Internal Views

Figure 1, Figure 2, Figure 3, and Figure 4 show a top view of the small-form-factor, low-profile, and midsize chassis and a side view of the mini tower chassis, respectively, to help you orient yourself when working inside the computer.

Figure 1. Small-Form-Factor Chassis Orientation View

1 System board 2 Diskette drive 3 Hard-disk drive 4 CD-ROM drive 5 Power supply

Figure 2. Low-Profile Chassis Orientation View

1 Hard-disk drive 2 Expansion-card cage 3 System board 4 Power supply 5 Externally accessible drive bays 6 Front of computer

Figure 3. Midsize Chassis Orientation View

1 Internal drive cage 2 Expansion-card cage 3 System board 4 Power supply 5 Drive cage 6 Front of computer

Figure 4. Mini Tower Chassis Orientation View

1 System board 2 Power supply 3 Drive cage 4 Internal drive bracket 5 Expansion-card cage 6 Bottom of computer

Figure 5, Figure 6, Figure 7, and Figure 8 show the small-form-factor, low-profile, midsize, and mini tower chassis, respectively, with the cover removed.

Figure 5. Inside the Small-Form-Factor Chassis

1 CD-ROM drive interface cable 2 Externally accessible upper bay 3 Hard-disk drive 4 Diskette-drive interface cable 5 Hard-disk drive interface cable 6 Expansion-card cage 7 System board 8 I/O ports and connectors 9 AC power receptacle 10 Security cable slot 11 Power supply 12 Chassis intrusion switch

Figure 6. Inside the Low-Profile Chassis

1 Drive in upper bay 2 Drive interface cable 3 Hard-disk drive 4 Chassis intrusion switch 5 System board 6 Expansion-card cage 7 Security cable slot 8 I/O ports and connectors 9 AC power receptacle 10 Padlock ring 11 Power supply

Figure 7. Inside the Midsize Chassis

1 Drive in upper bay 2 Internal drive cage 3 Chassis intrusion switch 4 Drive interface cable 5 Expansion-card cage 6 Security cable slot 7 I/O ports and connectors 8 AC power receptacle 9 Padlock ring 10 Power supply 11 System board 12 Drive interface cable

Figure 8. Inside the Mini Tower Chassis

1 External drive bay 2 Internal drive cage 3 Chassis intrusion switch 4 Drive interface cable 5 Expansion-card cage 6 System board 7 Riser board 8 Padlock ring 9 Security cable slot 10 I/O ports and connectors 11 AC power receptacle 12 Power supply

System Board Components

Figure 9 shows the system board and the location of all its sockets and connectors.

Figure 9. System Board Components

1 Line-in connector 2 Line-out connector 3 Microphone connector 4 NIC connector 5 Video connector 6 Serial port 2 connector 7 USB connectors (2) 8 Keyboard (lower) and mouse (upper) connectors 9 Parallel port (upper) and serial port 1 (lower) connectors 10 Microprocessor connector 11 RIMM sockets (2) 12 DC power 1 connector 13 Control panel connector 14 DC power 2 connector 15 Video-memory upgrade socket 16 External speaker connector 17 EIDE1 connector 18 EIDE2 connector 19 System board speaker 20 System board jumpers 21 Diskette/tape-drive connector 22 Riser board connector 23 Real-time clock reset (RTCRST) jumper 24 Battery 25 Modem audio connector 26 Fan connector 27 CD audio cable connector

System Board Jumpers

Figure 10 shows the layout of jumpers on the system board. Table 1 lists the system board jumpers and their settings.

Figure 10. 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 and unplugged from the electrical outlet 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.

Table 1. System-Board Jumper Settings

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

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

Rotating the Power Supply Away From the System Board (Midsize and Mini Tower Chassis Only)

To access some components on the system board, you may have to rotate the midsize or mini tower chassis system power supply out of the way. To rotate the power supply, perform the following  steps.

CAUTION: See "Safety First — For You and Your Computer."

1. Remove the computer cover as instructed in "Removing and Replacing the Computer Cover."
   

2. Disconnect the AC power cable from the AC power receptacle on the back of the power supply (Figure 11 illustrates rotating the power supply on the mini tower chassis; the power supply is on the right side of the midsize chassis).  
   
   
3. Free the power supply from the securing tab labeled "RELEASE - >, " and rotate it upward until it locks in its extended position.

Figure 11. Rotating the Power Supply

1 AC power cable 2 AC power receptacle 3 Power supply 4 DC power cables 5 Securing tab

Removing and Replacing the Front Bezel (Mini Tower Chassis Only)

To access some drive bays in the mini tower chassis, you must first remove the front bezel. To remove the front bezel, you first must remove the computer cover (see "Removing and Replacing the Computer Cover").

CAUTION: See "Safety First — For You and Your Computer."

With the cover removed, release the bezel by pressing the tab release marked with the icon.

Figure 12. Removing the Mini Tower Chassis Front Bezel

1 Tab release 2 Retaining hooks (2)

While pressing the tab release, tilt the bezel away from the chassis, disengage the two retaining hooks at the bottom of the bezel, and carefully pull the bezel away from the chassis.

To replace the bezel, fit the two retaining hooks on the bezel into their corresponding slots at the bottom of the mini tower chassis or the left side of the low-profile or midsize chassis. Then rotate the bezel toward the chassis until the tabs snap into their corresponding slots on the bezel.

Removing and Replacing the Expansion-Card Cage

This section describes how to remove and replace the expansion-card cage.

Small-Form-Factor, Low-Profile, and Midsize Chassis

To remove the expansion-card cage from the small-form-factor, low-profile, and midsize chassis, perform the following steps.

CAUTION: See "Safety First — For You and Your Computer."

1. Remove the computer cover.
   

2. Check any cables connected to expansion cards through the back-panel openings. Disconnect any cables that will not reach to where the cage must be placed upon removal from the chassis.
   
   
3. Locate the securing lever (see Figure 13). Rotate the lever upward until it stops in an upright position.

Figure 13. Removing the Expansion-Card Cage From the Small-Form-Factor, Low-Profile, or Midsize Chassis

1 Slots (2) 2 Tabs (2) 3 Securing lever

4. Slide the expansion-card cage out of the chassis.
   
   
5. Lift the expansion-card cage up and away from the chassis.

To replace the expansion-card cage into the small-form-factor, low-profile, and midsize chassis, perform the following steps:

1. With the securing lever in the upright position, align the slots in the left side of the expansion-card cage with the tabs on the left side of the chassis (see Figure 13). Slide the expansion-card cage into place.
   
   
2. Rotate the securing lever downward until it is flush with the top side 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 2 of the preceding procedure.

Mini Tower Chassis

To remove the expansion-card cage from the mini tower chassis, perform the following steps.

CAUTION: See "Safety First — For You and Your Computer."

1. Remove the computer cover as instructed in "Removing and Replacing the Computer Cover."

2. Check any cables connected to expansion cards through the back-panel openings. Disconnect any cables that will not reach to where the cage must be placed upon removal from the chassis.
   
   
3. Locate the securing lever (see Figure 14). Rotate the lever toward the back of the computer until it stops in an upright position.

Figure 14. Removing the Expansion-Card Cage From the Mini Tower Chassis

1 Securing lever 2 Tabs (2) 3 Slots (2)

4. Slide the expansion-card cage out of the chassis.
   
   
5. Lift the expansion-card cage up and away from the chassis.

To replace the expansion-card cage into the mini tower chassis, perform the following steps:

1. With the securing lever in the upright position, align the tabs on the left and right sides of the expansion-card cage with the slots on the back and bottom of the chassis (see Figure 14). Slide the expansion-card cage into place.
   
   
2. Rotate the securing lever downward until it is flush with the top side of the chassis. Make sure that the riser board is fully seated in the RISER connector on the system board (see Figure 9).
   
   
3. Reconnect any cables you removed in step 2 of the preceding procedure.

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