HP EliteBook 745 G2 HP Notebook PC and EliteBook 755 G2 Notebook PC - Maintenance and Service Guide

Heat sink
NOTE: The heat sink spare part kit includes replacement thermal material.
Description Spare part number
For use only on HP EliteBook 745 models 768790-001
For use only on HP EliteBook 755 models 773959-001
Before removing the heat sink, follow these steps:
1. Turn o the computer. If you are unsure whether the computer is o or in Hibernation, turn
the computer on, and then shut it down through the operating system.
2. Disconnect the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the following components:
a. Service door (see Service door on page 45)
b. Battery (see Battery on page 47)
c. Fan (see Fan on page 71)
d. Keyboard (see Keyboard on page 56)
e. Base enclosure (see Internal base enclosure on page 65)
Remove the heat sink:
1. Following the 1, 2, 3, 4 sequence stamped into the heat sink, loosen the four captive Phillips screws (1) –
(4) that secure the heat sink to the system board, and then remove the heat sink (5).
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.
76 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts