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System Board

Dell™ OptiPlex™ GX280 Systems User's Guide

  Small Form-Factor System Board

  Small Desktop System Board

  Desktop System Board

  Small Mini-Tower System Board

  Tower System Board

  Replacing the System Board

Small Form-Factor System Board

Small Desktop System Board

Desktop System Board

Small Mini-Tower System Board

Tower System Board

Jumper Settings

The jumper locations on the small form-factor, small desktop, desktop, small mini-tower, and mini-tower computers are shown below.

Small Form-Factor Computer

Small Desktop Computer

Desktop Computer

Small Mini-Tower Computer

Mini-Tower Computer

Jumper	Setting	Description
PSWD	(default)	Password features are enabled.
		Password features are disabled.
RTCRST		Real-time clock reset.
jumpered   unjumpered

Replacing the System Board

Removing the System Board: Small Form-Factor, Small Desktop, Small Mini-Tower Computers

1. Shut down the computer through the Start menu.
   
   
2. Ensure that your computer and attached devices are turned off. If your computer and attached devices did not automatically turn off when you shut down your computer, turn them off now.
   
   

NOTICE: To disconnect a network cable, first unplug the cable from your computer and then unplug it from the network wall jack.

3. Disconnect any telephone or telecommunication lines from the computer.
   
   
4. Disconnect your computer and all attached devices from their electrical outlets, and then press the power button to ground the system board.
   
   
5. Remove the computer stand, if it is attached.
   
   

CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before opening the cover.

6. Open the computer cover.
   
   

NOTICE: Before touching anything inside your computer, ground yourself by touching an unpainted metal surface, such as the metal at the back of the computer. While you work, periodically touch an unpainted metal surface to dissipate any static electricity that could harm internal components.

7. Remove any components that restrict access to the system board.
   
   
8. Disconnect all cables from the system board.
   
   
9. Before you remove the existing system board assembly, visually examine the existing system board to determine the chassis configuration:
   
   
   1. If a green tab is present on the front of the system board, your computer uses a metal tray to attach the system board to the chassis.
      
      

NOTE: If your original system board is attached to a metal tray, you will transfer the replacement board to the metal tray before you install the new board. See step 1 in the next procedure.

2. If a green tab is not present on the front of the system board, your computer uses a mounting plate to attach the system board to the chassis.
   
   
10. Remove the system board:
    
    
    1. If your system board is mounted to the chassis using a metal tray, remove the tray and the board as one piece:
       
       
       • Pull up on the tab and slide the system board assembly toward the front of the computer, and then lift the board away.
         
         
    2. If your system board is mounted to the chassis using a mounting plate, remove the system board and mounting plate as one piece:
       
       
       • Remove the retention screw at the front of the computer.
         
         
       • Slide the system board assembly toward the front of the computer, detaching it from the hooks on the floor of the chassis, and then lift the board away.
         
         

1	system board/metal tray assembly removal
2	tab
3	system board/mounting plate assembly removal
4	retention screw

Removing the System Board: Desktop and Mini-Tower Computers

1. Shut down the computer through the Start menu.
   
   
2. Ensure that your computer and attached devices are turned off. If your computer and attached devices did not automatically turn off when you shut down your computer, turn them off now.
   
   

NOTICE: To disconnect a network cable, first unplug the cable from your computer and then unplug it from the network wall jack.

3. Disconnect any telephone or telecommunication lines from the computer.
   
   
4. Disconnect your computer and all attached devices from their electrical outlets, and then press the power button to ground the system board.
   
   

CAUTION: To guard against the electrical shock, always unplug your computer from the electrical outlet before opening the cover.

5. Open the computer cover.
   
   

NOTICE: Before touching anything inside your computer, ground yourself by touching an unpainted metal surface, such as the metal at the back of the computer. While you work, periodically touch an unpainted metal surface to dissipate any static electricity that could harm internal components.

6. Remove any components that restrict access to the system board (CD/DVD drive(s), floppy drive, hard drive, I/O panel).
   
   
7. Remove the heat sink assembly and processor.
   
   
8. Disconnect all cables from the system board.
   
   
9. Remove the 10 screws from the system board (see illustrations below for screw locations).
   
   
10. Slide the system board assembly toward the front of the computer, and then lift the board up and away.
    
    

1	desktop system board
2	screws (10)

1	mini-tower system board
2	screws (10)

11. Place the system board assembly that you just removed next to the replacement system board to ensure it is identical.
    
    

Replacing the System Board: Small Form-Factor, Small Desktop, and Small Mini-Tower Computers

1. If your original system board uses a mounting plate rather than a tray to attach to the chassis, replace the existing system board with the replacement system board:
   
   
   1. Slide the system board assembly toward the back of the computer, attaching it to the hooks on the floor of the chassis.
      
      
   2. Replace the retention screw at the front of the computer.
      
      

1	retention screw
2	hooks (4)

2. If your original system board uses a metal tray rather than a mounting plate to attach to the chassis:
   
   
   1. Detach the system board from the metal tray:
      
      
      • Remove the screw that secures the original board to the metal tray.
        
        
      • Remove the four mounting screws from the heat-sink retention base, and then remove the system board by sliding the board back and detaching it from the hooks on the metal tray.
        
        

2. Detach the replacement system board from its mounting plate by removing the four mounting screws from the heat-sink retention base. Set the mounting plate aside for later installation on the old system board prior to shipping back to Dell.
   
   

3. Install the replacement system board onto the metal tray by sliding the replacement system board forward to attach the board to the hooks on the metal tray. Install the retention base using the four mounting screws, and then replace the screw at the front of the system board.
   
   

4. Install the mounting plate on the original system board using the retention base and the four mounting screws.
   
   

3. Transfer components from the existing system board to the replacement system board:
   
   
   1. Remove the memory modules from the existing system board and install them on the replacement board.
      
      

CAUTION: The processor package and heat-sink assembly can get hot. To avoid burns, ensure that the package and assembly have had sufficient time to cool before you touch them.

2. Remove the heat-sink assembly and processor from the existing system board and transfer them to the replacement system board.
   
   
4. Configure the settings of the replacement system board.
   
   
5. Set the jumpers on the replacement system board so they are identical to the ones on the existing board.
   
   

NOTE: Some components and connectors on the replacement system board may be in different locations than the corresponding connectors on the existing system board.

6. Orient the replacement board by aligning the notches on the bottom to the tabs on the computer.
   
   
7. Replace the system board:
   
   
   1. If your system board is attached to a metal tray, slide the system board assembly toward the back of the computer until the board clicks into position.
      
      
   2. If your chassis is attached to a mounting plate, slide the system board into position and replace the retention screw.
      
      
8. Replace any components and cables that you removed from the system board.
   
   
9. Reconnect all cables to their connectors at the back of the computer.
   
   
10. Close the computer cover.
    
    
11. Attach the computer stand.
    
    

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

12. Connect your computer and devices to electrical outlets, and turn them on.
    
    

Replacing the System Board: Desktop and Mini-Tower Computers

1. Gently align the board into the chassis and slide it toward the back of the computer.
   
   
2. Replace the screws on the system board.
   
   
3. Replace any components and cables that you removed from the system board.
   
   
4. Reconnect all cables to their connectors at the back of the computer.
   
   
5. Close the computer cover.
   
   

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

6. Connect your computer and devices to electrical outlets, and turn them on.
   
   

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