Dell Precision 650 - Manual (Page 100)

12. Remove the thermal grease protective cover and place the heat sink in the base.
13. Place one end of the heat sink under the tab on the retention module on the side opposite the lever. Lower the heat sink onto the microprocessor so
that the heat sink fits securely under the tab on the other end of the retention module.
14. Replace the retention module clips.
15. 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.
16. If you are installing a second microprocessor, install the VRM .
17. Replace the airflow shroud (for the Dell Precision 650 computer, see " Microprocessor Airflow Shroud " or for the Dell Precision 450 computer, see
" Microprocessor Airflow Shroud ").
18. Close the computer cover.
19. Connect your computer and devices to electrical outlets, and turn them on.
Removing the Microprocessor
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.
3. Disconnect any telephone or telecommunication lines from the computer.
4. Disconnect your computer and all attached devices from electrical outlets, and then press the power button to ground the system board.
5. If you have installed a padlock through the padlock ring on the back panel, remove the padlock.
1 microprocessor pin-1
indicator
2 release lever
3 microprocessor
4 microprocessor socket
5 socket pin-1 indicator
NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.
NOTE: It is recommended that only a technically knowledgeable person perform this procedure.
CAUTION: The processor can get very hot during normal operation. Ensure that the processor has had sufficient time to cool before you touch it.
CAUTION: Before you perform this procedure, follow the safety instructions in the System Information Guide.
NOTICE: To disconnect a network cable, first unplug the cable from your computer and then unplug it from the network wall jack.
CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before opening the cover.