HP ProBook 4545s HP ProBook 4545s Notebook PC - Maintenance and Service Guide - Page 60

system board, Lift the left end of the heat sink

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3. Rotate the heats sink up on the left end (2) and slide the heat sink to the left (3) to remove it from the system board. Remove the UMA heat sink. 1. Position the computer upside down with battery bay away from user. 2. To remove the discrete heat sink, loosen the four captive Phillips screws (1) in the order indicated on the component, that secure the heat sink to the system board. 3. Lift the left end of the heat sink (2) and then slide the heat sink to the left to remove it from the system board (3). NOTE: For discrete models, thoroughly clean thermal material from the surface of the system board (1) and (3) and from the heat sink components(2) and (4) each time you remove the heat sink. All heat sink and processor spare part kits include thermal material. 52 Chapter 4 Removal and replacement procedures

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3.
Rotate the heats sink up on the left end
(2)
and slide the heat sink to the left
(3)
to remove it
from the system board.
Remove the UMA heat sink.
1.
Position the computer upside down with battery bay away from user.
2.
To remove the discrete heat sink, loosen the four captive Phillips screws
(1)
in the order
indicated on the component, that secure the heat sink to the system board.
3.
Lift the left end of the heat sink
(2)
and then slide the heat sink to the left to remove it from the
system board
(3)
.
NOTE:
For discrete models, thoroughly clean thermal material from the surface of the system board
(1)
and
(3)
and from the heat sink components
(2)
and
(4)
each time you remove the heat sink. All
heat sink and processor spare part kits include thermal material.
52
Chapter 4
Removal and replacement procedures