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.
NOTICE: To disconnect a network cable, first unplug the cable from your computer and then
unplug it from the network wall jack.
Disconnect any telephone or telecommunication lines from the computer.
Disconnect your computer and all attached devices from their electrical outlets, and
then press the power button to ground the system board.
CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before you open the cover.
NOTICE: Before touching anything inside your computer, ground yourself by touching an
unpainted metal surface, such as the metal at the back of the computer. While you work,
periodically touch an unpainted metal surface to dissipate any static electricity that could harm
internal components.
Disconnect the cooling fan power cable from the FAN connector on the system board
(see "System Board Components").
Disconnect the power cable from the 12VPOWER connector on the system board.
CAUTION: The heat sink can get very hot during normal operation. Be sure that the
heat sink has had sufficient time to cool before you touch it.
Pull up and rotate the airflow shroud.
Remove the heat sink:
Press the tab on the green securing clip to remove the clip from the retention base.
1
securing clip
2
tab
3
slot
4
retention base
Remove the heat sink by pressing the retention base tab while lifting one end of
the heat sink.
NOTICE: Lay the heat sink down with the thermal material facing upward.
1
heat sink
2
retention base tab
3
retention base
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 when you
install your new processor.
NOTICE: Be careful not to bend any of the pins when you remove the processor from the
socket. Bending the pins can permanently damage the processor.
Pull the release lever straight up until the processor is released, and then remove the
processor from the socket.
CAUTION: 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 processor. Bending the
pins can permanently damage the processor. If any of the pins on the processor appear to be
bent, contact Dell for instructions on obtaining technical assistance.
Unpack the new processor.
1
pin-1 corners of the processor and socket aligned
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.
If the release lever on the socket is not fully extended, move it to that position.
Align the pin-1 corners of the processor and socket.
NOTICE: When you place the processor in the socket, ensure that all of the pins fit into the
corresponding holes on the socket.
Set the processor 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 processor is
misaligned. When the processor is positioned correctly, press it with minimal pressure
to seat it.
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: If you are not installing a processor upgrade kit from Dell, reuse the original heat
sink when you replace the processor.
Install the heat sink:
Place one end of the heat sink under the tab on one side of the retention base.
Lower the heat sink until the heat sink fits securely under the tab on the retention
base.
Insert the securing clip by placing the notched end of the clip opposite the tab
into the slot on the retention base. Press the securing clip tab and lower the
securing clip into place. Make sure that the notched ends of the securing clip are
secured in the retention base slots.
1
heat sink
2
retention base tab
3
retention base
1
securing clip
2
tab
3
slot
4
retention base
Lower the airflow shroud over the heat sink.
Reconnect the cooling fan power cable to the FAN connector on the system board.
Reconnect the power cable to the 12VPOWER connector on the system board.
