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Microprocessor

Dell™ Dimension™ 8300 Series Service Manual

  Removing the Microprocessor

  Installing the Microprocessor

Removing the Microprocessor

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 you open 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. Disconnect the cooling fan power cable from the FAN2 connector on the system board.
   
   
7. Disconnect the power cable from the PWR connector on the system board.
   
   
8. Lift up the airflow shroud.
   
   

CAUTION: The heat sink can get very hot during normal operation. Be sure that the heat sink has had sufficient time to cool before you touch it.

9. Remove the heat sink:
   
   
   1. Release the retention module clip by pressing in on the tab and lifting the retention module clip up.

   

   2. Pull the release lever out until the heat sink is released.
      
      
   3. Lift the heat sink away from the microprocessor.
      

NOTICE: Lay the heat sink down with the thermal grease facing upward.

NOTICE: If you are installing a microprocessor upgrade kit from Dell�, discard the original heat sink. If you are not installing a microprocessor upgrade kit from Dell, reuse the original heat sink and blower when you install your new microprocessor.

NOTICE: Be careful not to bend any of the pins when you remove the microprocessor from the socket. Bending the pins can permanently damage the microprocessor.

11. Remove the microprocessor from the socket.
    
    

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

Installing the Microprocessor

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

NOTICE: Be careful not to bend any of the pins when you unpack the microprocessor. Bending the pins can permanently damage the microprocessor. If any of the pins on the microprocessor appears to be bent, see "Contacting Dell" in the Owner's Manual for instructions on obtaining technical assistance.

1. Unpack the new microprocessor.
   
   

NOTICE: You must position the microprocessor correctly in the socket to avoid permanent damage to the microprocessor and the computer when you turn on the computer.

2. If the release lever on the socket is not fully extended, move it to that position.
   
   
3. Align the pin-1 corners of the microprocessor and socket.
   
   

NOTICE: When you place the microprocessor in the socket, ensure that all of the pins fit into the corresponding holes on the socket.

4. Set the microprocessor lightly in the socket and ensure that all pins are headed into the correct holes. Do not use force, which could bend the pins if the microprocessor is misaligned. When the microprocessor is positioned correctly, press it with minimal pressure to seat it.
   
   
5. When the microprocessor is fully seated in the socket, pivot the release lever back toward the socket until it snaps into place to secure the microprocessor.
   
   

NOTICE: If you are not installing a microprocessor upgrade kit from Dell, reuse the original heat-sink assembly when you replace the microprocessor.

If you installed a microprocessor replacement kit from Dell, return the original heat-sink assembly and microprocessor to Dell in the same package in which your replacement kit was sent.

6. Install the heat sink:
   
   
   1. Insert the notched end of the heat sink onto the end of the retention base that is opposite the hinge.
      
      
   2. Lower the heat sink until it fits securely in the base.
      
      

      

   3. When the heat sink is secured, pivot the retention module clip back until the tab snaps into place to secure the heat sink.
   
   
   
7. Lower the airflow shroud over the heat sink.
   
   
8. Reconnect the cooling fan power cable to the FAN2 connector on the system board.
   
   
9. Reconnect the power cable to the PWR connector on the system board.
   
   
10. 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.

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

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