HP EliteBook 8470w, Maintenance And Service Manual

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f. Fan (see Fan on page 90 )
g. Keyboard (see Keyboard on page 91 )
h. Base enclosure (see Base enclosure on page 96 )
i. System board (see System board on page 112 )
Remove the heat sink:
NOTE: Steps 1 and 2 apply to computer models equipped with a graphics subsystem with discrete
memory. See steps 3 and 4 for heat sink removal information for computer models equipped with a
graphics subsystem with UMA memory.
1. Following the 1, 2, 3, 4, 5, 6 sequence stamped into the heat sink, loosen the six captive Philllips
screws
(1) and (2) that secure the heat sink to the system board.
2. Remove the heat sink (3) .
NOTE: Due to the adhesive quality of the thermal material located between the heat sink and
the system board components, it may be necessary to move the heat sink from side to side to
detach it.
NOTE: Steps 3 and 4 apply to computer models equipped with a graphics subsystem with UMA
memory. See steps 1 and 2 for heat sink removal information for computer models equipped with
a graphics subsystem with discrete memory.
3. Following the 1, 2, 3, 4 sequence stamped into the heat sink, loosen the four captive Philllips
screws
(1) that secure the heat sink to the system board.
116 Chapter 4 Removal and replacement procedures