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Processor

Dell™ OptiPlex™ SX280 User's Guide

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.

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

NOTICE: When replacing the processor, do not touch the underside of the new processor.

NOTICE: When replacing the processor, do not touch any of the pins inside the socket or allow any objects to fall on the pins in the socket.

1. Follow the procedures in "Before You Begin."
   
   
2. Remove the fan shroud by lifting the fan shroud up and away from the computer.

1	fan shroud

CAUTION: The heat sink can get extremely hot. Be sure the heat sink has had sufficient time to cool before you touch it.

3. Remove the heat sink.
   
   
   1. Remove the memory module (see "Removing Memory") closest to the heat sink.
      
      
   2. Press the lever on the retention base until the heat sink is released.
      
      

1	top of heat sink	3	retention base
2	heat sink	4	lever

3. Gently lift the heat sink from the processor.
   
   

NOTICE: Lay the heat sink down on its top, with the thermal grease facing upward.

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

1	processor
2	socket
3	release lever

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

NOTICE: When replacing the processor, do not touch any of the pins inside the socket or allow any objects to fall on the pins in the socket.

5. Unpack the new processor, being careful not to touch the underside of the processor.
   
   
6. If the release lever on the socket is not fully extended, move it to that position.
   
   
7. Orient the front and rear alignment notches on the processor with the front and rear alignment notches on the socket.
   
   
8. Align the pin-1 corners of the processor and socket.
   
   

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

9. Set the processor lightly in the socket and ensure that the processor is positioned correctly.
   
   
10. When the processor is fully seated in the socket, pivot the release lever back toward the socket until it snaps into place to secure the processor.
    
    

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

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

11. Place one end of the heat sink under the tab on the retention base on the side opposite the lever (see the illustration). Lower the heat sink onto the processor so that the heat sink fits securely under the tab on the other end of the retention base.
    
    

12. Replace the computer cover.
    
    
13. Replace the cable cover, if used.
    
    

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

14. Connect your computer to the adapter cable and devices to electrical outlets, and turn them on.
    
    

After you replace 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.

15. Reset the chassis intrusion detector by changing the Chassis Intrusion option to On or On-Silent.
    
    

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

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