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90 | Installing System Components
1 Align the air ducts to the system-board assembly and heat sinks by the
rivet holes. See Figure 3-7.
2 Replace the rivets to secure the air ducts to the system-board assembly
and heat sinks. See Figure 3-7.
Heat Sinks
Removing the Heat Sink
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, including any attached peripherals, and
disconnect the system from its electrical outlet.
2 Remove the system-board assembly. See “Removing a System-Board
Assembly" on page 87.
3 Remove the air duct(s). See “Removing the Air Duct" on page 88.
WARNING: The heat sink may be hot to touch for some time after the system has
been powered down. Allow the heat sink to cool before removing it.
CAUTION: Never remove the heat sink from a processor unless you intend to
remove the processor. The heat sink is necessary for proper thermal conditions.
4 Using a Phillips screwdriver, loosen one of the heat-sink retention
screws. See Figure 3-8.
Wait for 30 seconds for the heat sink to loosen from the processor.
5 Remove the other heat-sink retention screw.
6 Gently lift the heat sink off the processor and set the heat sink aside
with thermal grease side facing up.