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Microprocessor

Dell™ OptiPlex™ GX260 Systems User's Guide

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

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

1. Perform an orderly computer shutdown using the operating system menu.
   
   

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

2. Turn off any attached devices and disconnect them from their electrical outlets.
   
   
3. Disconnect the computer power cable from the wall outlet, and then press the power button to ground the system board.
   
   
4. Open the computer cover.
   
   
5. Disconnect the cooling fan power cable from the FAN connector on the system board.
   
   
6. Disconnect the power cable from the 12VPOWER connector on the system board.
   
   
7. Lift up the airflow shroud.
   
   

Airflow Shroud Rotation

8. Remove the heat sink.
   
   
   1. Press and lower the green lever on the retention mechanism until it is parallel to the system board.
      
      
   2. Gently rock the heat sink and then slightly twist it as you lift it from the microprocessor.
      
      

Heat Sink Removal

1	heat sink
2	lever
3	retention base

NOTICE: Lay the heat sink down with the thermal solution 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.

9. 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.

Microprocessor Removal

1	release lever
2	microprocessor
3	socket

10. 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: You must position the microprocessor correctly in the socket to avoid permanent damage to the microprocessor and the computer.

1. If the release lever is not extended to the release position, move it to that position.
   
   
2. Align pin 1 (the imprinted corner) of the microprocessor and pin 1 of the socket.
   
   

Microprocessor Installation

1	pin-1 corners of microprocessor and socket aligned

NOTICE: Microprocessor pins are delicate. To avoid damage, ensure that the microprocessor aligns properly with the socket, and do not use excessive force when you install the processor.

3. Carefully set the microprocessor in the socket and press it down lightly to seat it.
   
   
4. Rotate the release lever back toward the system board until it snaps into place, securing the microprocessor.
   
   
5. 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.
      
      
6. Raise the retention lever and press until the heat sink is secured. You will feel the lever pause once it is at a 90-degree angle. Keep pressing on the lever another 30 degrees, ensuring that it is in the locked position.
   
   

Heat Sink Replacement

1	heat sink
2	lever
3	hinge
4	retention base
5	notch

7. Lower the airflow shroud over the heat sink.
   
   

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.

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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