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Microprocessor

Dell™ OptiPlex™ GX270 Systems User's Guide

Removing the Microprocessor

CAUTION: Before you begin any of the procedures in this section, follow the steps in "Safety Instructions."

CAUTION: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface on the computer chassis.

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 FAN connector on the system board (see "System Board Components").
   
   
7. Disconnect the power cable from the 12VPOWER 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. Press the tab on the green securing clip to remove it from the retention base.
      
      
   2. Remove the heat-sink by pressing on the retention base tab while lifting one end of the heat sink.
      
      

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

1	securing clip
2	tab
3	retention base

1	heat sink
2	tab
3	retention base

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.

10. Pull the release lever straight up until the microprocessor is released.
    
    

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.

1	release lever
2	microprocessor
3	socket

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 appear to be bent, contact Dell 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. Place the one end of the heat sink under the tab on one side of the retention base.
      
      
   2. Lower the heat sink until the heat sink fits securely under the tab on the retention base.
      
      
   3. Insert the securing clip by placing the notched end of the clip opposite the tab into the slot on the retention base. Press on the securing clip tab and lower the securing clip into place. Make sure that the notched ends of the securing clip are secured in the retention base slots.
      
      

1	heat sink
2	retention base tab
3	retention base

1	securing clip
2	tab
3	slot
4	retention base

7. Lower the airflow shroud over the heat sink.
   
   
8. Reconnect the cooling fan power cable to the FAN connector on the system board.
   
   
9. Reconnect the power cable to the 12VPOWER 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.
    
    

After you open and close the cover, the chassis intrusion detector, if enabled, causes the following message to appear on the screen at the next computer start-up:

ALERT! Cover was previously removed.

12. Reset the chassis intrusion detector by changing the Chassis Intrusion option to Enabled or Enabled-Silent.
    
    

NOTE: If a setup password has been assigned by someone else, contact your network administrator for information on resetting the chassis intrusion detector.

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