Owner`s manual

84 Installing System Components
d W hen the processor is fully seated in the socket, rotate the socket
release lever back down until it snaps into place, securing the
processor.
See Figure 3-22.
4 Clean the thermal grease from the bottom of the heat sink.
NOTICE: Ensure that you apply new thermal grease. Applying new thermal grease
is critical to ensuring proper thermal bonding as well as optimal processor
operation.
5 Apply new thermal grease to the top of the processor.
6 Place the heat sink assembly back onto the heat sink assembly bracket and
tilt the heat sink assembly down on the system board. See Figure 3-21.
7 Align the two captive screws properly with the system board, then tighten
them to secure the heat sink assembly to the system board.
8 Close the system. See "Closing the System" on page 47.
9 Reconnect the system to the electrical outlet, and turn on the system and
attached peripherals.
Cooling Fans
The system contains two cooling fans, one for the processor and one for the
card cage. Each contains a shroud that is part of the cooling fan assembly. The
fan and shroud are replaced as a unit.
NOTE: If you are removing the larger processor cooling fan, you must first remove
the heat sink and shroud assembly. See "Removing the Processor" on page 81
(however, do not remove the processor) and Figure 3-24.
Removing the Cooling Fans
CAUTION: Many repairs may only be done by a certified service technician. You
should only perform troubleshooting and simple repairs as authorized in your
product documentation, or as directed by the online or telephone service and
support team. Damage due to servicing that is not authorized by Dell is not covered
by your warranty. Read and follow the safety instructions that came with the
product.
1 Turn off the system and attached peripherals, and disconnect the system
from the electrical outlet.
2 Open the system. See "Opening the System" on page 47.
book.book Page 84 Wednesday, June 24, 2009 8:21 AM