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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. Remove the computer stand, if it is attached.
   
   
5. Open the computer cover.
   
   
6. Disconnect the cooling fan power cable from the FAN connector on the system board.
   
   
7. Disconnect the 12-volt power cable from the 12VPOWER connector on the system board.
   
   
8. Remove the heat sink/blower assembly.
   
   
   1. The heat sink is attached to the blower. 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.
      
      

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

Heat Sink/Blower Assembly Removal

1	blower	4	retention base
2	screws (2)	5	heat sink
3	lever

9. Lift the heat sink/blower assembly away from the microprocessor.
   
   
10. Remove the two screws on the blower to remove it from the heat sink.
    
    

NOTICE: Do not discard the blower. You will reuse it. 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 when you install your new microprocessor.

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

11. Pull the release lever straight up until the microprocessor is released, and then remove the microprocessor from the socket.
    
    

Microprocessor Removal

1	release lever
2	microprocessor
3	socket

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.

12. Unpack the new microprocessor.
    
    

If any of the pins on the microprocessor appear to be bent, contact Dell (see "Getting Help") for instructions on obtaining technical assistance.

Microprocessor Installation

1	pin-1 corners of microprocessor and socket aligned

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.

13. If the release lever on the socket is not fully extended, move it to that position.
    
    
14. 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. Be careful not to bend the pins.

15. 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.
    
    
16. 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: Ground yourself by touching an unpainted metal surface on the back of the computer.

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

If you are installing a microprocessor replacement kit from Dell, return the microprocessor to Dell in the same package in which your replacement kit was sent.

17. Reinstall the two screws that attach the blower to the heat sink.
    
    
18. Lower the heat sink/blower assembly to the microprocessor so that the heat sink fits in the retention base.
    
    
19. 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 the lever another 30 degrees, ensuring that it is in the locked position.
    
    

Heat Sink/Blower Assembly Replacement

1	heat sink/blower assembly
2	lever
3	retention base

20. Plug the fan cable into the FAN connector on the system board.
    
    
21. Plug the 12-volt power cable into the 12VPOWER connector on the system board.
    
    
22. Close the computer cover.
    
    
23. Attach the computer stand (optional).
    
    

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

24. 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.

25. 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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