HP EliteBook 745 Maintenance and Service Guide - Page 58

Heat sink assembly, Discrete graphics models

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Heat sink assembly NOTE: The heat sink assembly spare part kit includes replacement thermal material. Table 6-2 Heat sink descriptions and part numbers Description Spare part number Heat sink L68813-001 Before removing the heat sink assembly, follow these steps: 1. Prepare the computer for disassembly (Preparation for disassembly on page 34). 2. Remove the bottom cover (see Bottom cover on page 34). 3. Disconnect the battery cable from the system board (see Battery on page 46). Remove the heat sink assembly: 1. Discrete graphics models: Loosen the six captive screws on the heat sink following the sequence stamped on the heat sink (1), and then remove the heat sink from the system board (2). IMPORTANT: Take extreme care when removing the heat sink. The heatpipe is very fragile and can be easily damaged and bent during removal. Do not remove the shielding from the thermal module or heat pipe. 48 Chapter 6 Removal and replacement procedures for authorized service provider parts

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Heat sink assembly
NOTE:
The heat sink assembly spare part kit includes replacement thermal material.
Table 6-2
Heat sink descriptions and part numbers
Description
Spare part number
Heat sink
L68813-001
Before removing the heat sink assembly, follow these steps:
1.
Prepare the computer for disassembly (
Preparation for disassembly
on page
34
).
2.
Remove the bottom cover (see
Bottom cover
on page
34
).
3.
Disconnect the battery cable from the system board (see
Battery
on page
46
).
Remove the heat sink assembly:
1.
Discrete graphics models:
Loosen the six captive screws on the heat sink following the sequence
stamped on the heat sink
(1)
, and then remove the heat sink from the system board
(2)
.
IMPORTANT:
Take extreme care when removing the heat sink. The heatpipe is very fragile and can be
easily damaged and bent during removal.
Do not remove the shielding from the thermal module or heat pipe.
48
Chapter 6
Removal and replacement procedures for authorized service provider parts