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NOTICE: If you are installing a processor upgrade kit from Dell, discard the original heat sink. If you are not installing a processor upgrade kit from Dell, reuse the original heat sink and blower when you install your new processor. 5. To remove the processor from the socket, lift the processor vertically in one motion. Leave the release lever extended in the release position so that the socket is ready for the new processor. Installing the Processor 1. Unpack the new processor. 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 processor and socket. 4. Set the processor lightly in the socket and ensure that the processor is level in the socket. When the processor is positioned correctly, press it with minimal pressure to seat it. 5. When the processor is fully seated in the socket, close the processor cover. Ensure that the tab on the processor cover is positioned underneath the center cover latch on the socket. NOTICE: Ground yourself by touching an unpainted metal surface on the back of the computer. NOTICE: You must position the processor correctly in the socket to avoid permanent damage to the processor and the computer when you turn on the computer. NOTICE: To avoid damage, ensure that the processor aligns properly with the socket, and do not use excessive force when you install the processor. NOTICE: Be careful not to touch or bend the pins on the system board. 6. Pivot the socket release lever back toward the socket and snap it into place to secure the processor. If you installed a processor replacement kit from Dell, return the original heat sink assembly and processor to Dell in the same package in which your replacement kit was sent. 7. Install the heat sink: a. Slide one end of the heat sink under the retention tab. b. Pull out the other retention tab and lower the heat sink until it fits securely in the base. 8. Reinstall the retention module clips. 9. Lower the airflow shroud over the heat sink. 10. Reconnect the cooling fan power cable to the fan connector on the system board. 11. Reconnect the power cable to the power connector on the system board. 12. Close the computer cover. 13. Connect your computer and devices to electrical outlets, and turn them on. System Board Removing the System Board 1. Follow the procedures in "Before You Begin." NOTICE: If you are not installing a processor upgrade kit from Dell, reuse the original heat sink assembly when you replace the processor. NOTICE: Ensure the heat sink is correctly seated and secure. NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer. CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide. 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. NOTICE: The system board and metal tray are connected and are removed as one piece. 2. Open the computer cover. 3. Remove any components that restrict access to the system board. 4. Disconnect all cables from the system board. 5. Before you remove the existing system board assembly, visually compare the replacement system board to the existing system board to make sure that you have the correct part. 6. Remove the system board screw. 7. Pull up on the two tabs, slide the system board assembly toward the front of the computer, and then lift the asembly up and away. 8. Place the system board assembly that you just removed next to the replacement system board. Replacing the System Board 1. Transfer components from the existing system board to the replacement system board: a. Remove the memory modules and install them on the replacement board. b. Install them on the replacement board. c. Remove the heat-sink assembly and processor from the existing system board and transfer them to the replacement system board. 2. Configure the settings of the replacement system board. 3. Set the jumpers on the replacement system board so they are identical to the ones on the existing board. 4. Orient the replacement board by aligning the notches on the bottom of the board with the tabs on the computer. 5. Slide the system board assembly toward the back of the computer until the assembly clicks into position. 6. Replace any components and cables that you removed from the system board. 7. Reconnect all cables to their connectors at the back of the computer. 8. Close the computer cover. CAUTION: The processor package and heat-sink assembly can get hot. To avoid burns, ensure that the package and assembly have had sufficient time to cool before you touch them. NOTE: Some components and connectors on the replacement system board may be in different locations than the corresponding connectors on the existing sy...