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System Board

Dell™ Dimension™ 8300 Series Service Manual

  Removing the System Board

  Replacing the System Board

Removing the System Board

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in your Owner's Manual.

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 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.

NOTICE: The system board and metal tray are connected and are removed as one piece.

6. Remove any components that restrict access to the system board.
   
   
7. Disconnect all cables from the system board.
   
   
8. Before you remove the existing system board assembly, visually compare the replacement system board to the existing system board to make sure that you have the correct part.
   
   
9. Pull up on the tab and slide the system board assembly toward the front of the computer, and then lift it up and away.
   
   

10. Place the system board assembly that you just removed next to the replacement system board.
    
    

Replacing the System Board

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

CAUTION: The microprocessor 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 microprocessor from the existing system board and transfer them to the replacement system board.
   
   

2. Configure the settings of the replacement system board.
   
   
3. 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 from the corresponding connectors on the existing system board.

4. Orient the replacement board by aligning the notches on the bottom to the tabs on the computer.
   
   
5. Slide the system board assembly toward the back of the computer until it clicks into place.
   
   
6. Replace any components and cables that you removed from the system board.
   
   
7. Reconnect all cables to their connectors at the back of the computer.
   
   
8. 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.

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

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